Persistent DSL connection problems (distance to DSL hub)

My disabled brother has had Verizon DSL for several years now and we've ontinually have problems with the connection. He lives in a group home; I'm in a different state.. After numerous of calls to Verizon DSL support line, hundreds of dollars spent for at-home technical support (not from Verizon), and several visits by Verizon technicians, we were finally told that the problem was the distance from the DSL hub.
I'm so frustrated and angry. We've been paying for this service for years. Finally we get an explanation which sounds accurate but the resolution is out of our hands. I'm unable to get in touch with Verizon (by phone) to find out if they plan to do anything about this. The internet is one of the primary ways my brother can communicate with friends and he's so discouraged now.
Has anyone else had this problem? Have you had success in resolving it?
Do you have any recommendations? Fios is not available in the area and cable DSL is not an option because he lives in a group home and the management won't let residents use the buiness's DSL.
Oh yes--I tried the link to the disability services URL, but got an error message.

IHave the same issue as of now ,i have been without a verizon connection for a day and a half.the verizon tech told me there was nothing that could be done. he also told me to switch my cable provider for internet service(comcast). but that is almost twice the cost. I am using another connection to write this . this is absolutley ridiculous. i share the same feelings you do.

Similar Messages

Persistent Airport connection problems

I've been having persistent airport connection problems since upgrading to Leopard. It got so bad that I finally installed an Ethernet network in my office. However, I really want to be able to use my laptop in other rooms so I want to fix this problem if possible.
Here's what happens. When I turn Airport on, and then select my network, I am prompted to enter my password (even though it's in the keychain). When I click "OK", I get a "connection timeout" error and no connection is made. This happens on both my MacBook and my Mac Pro.
I am currently using a D-Link ethernet/wireless router, but the problem also occurs with an Airport Express which I used previously and still have. I am using mixed 802.11n and 802.11g with WPA personal security and "WPA only" mode.
One note: if I disable any kind of network security, I can easily connect to the network. So it seems to have something to do with the security setting.

Can you reconfigure your router to use WPA2? Some people have found satisfaction after switching to the security model: http://discussions.apple.com/message.jspa?messageID=7336628#7336628

Persistent internet connection problems.

Every 8 months I get a spate of internet connection problems that last for a few months. (Meaning I get relief for two months at a time, and bad service for two months). When the previous bout of internet connection issues happened I was fortunate enough to get a good technician who showed me how to reset the connection at the fios box at the entrance to my home, by unplugging the backup battery, unplugging the connection box and then reconnecting the battery and plugging back in the connection box. The technician had remarked that there were problems with the main fios connection system to the townhouses, and somehow that got fixed.
This time I have not had as much luck. The technicians on duty have had me reset the cable router (which isn't the problem) and even replace the cable router (also not the problem). Fortunately I have remembered the previous technician's solution and am doing that every three days, without contacting technical support since they have proven useless at this time, only continuing to have me get new routers that do not even connect without the previous steps.
How do I get Verizion to bother to listen to me? At this time I am really wishing Cox was in my neighborhood, since I was able to go at least eight months straight without problems from them.
I am hoping that this causes someone to check on this problem. You had a good technician on technical support once, but not now.
By the way - this has been going on for over two years.

AtrixWolfe
Since we haven't heard back from you or have received a form submission as requested in your private support case, it appears assistance is no longer required. If you need any future help with your Verizon service, please make a post here on the forums so we can assist.
Anthony_VZ
**If someones post has helped you, please acknowledge their assistance by clicking the red thumbs up button to give them Kudos. If you are the original poster and any response gave you your answer, please mark the post that had the answer as the solution**
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Printing wirelessly via Airport Express to DSL hub to ethernet printer?

This seems like a fairly standard set up.
My iBook prints just fine when cabled directly to the DSL (Verizon/Westell Versalink 327W) cabled to the ethernet printer, and connects wirelessly just fine through the Airport Express (AX) cabled to the DSL hub, but I can't print wirelessly.
My questions are:
- The hub IP is 192.168.1.1, and the printer is 192.168.1.10. I changed the AX IP (Airport Admin Utility: Network) from 10.0.1.1 addressing to 192.168.1.1 addressing, but that didn't do anything. Does this matter?
- In Airport Admin Utility: Internet, the router address is 10.0.36.1. Does this matter? Should it be 192.168.1.X?
Note: In the Printer Setup Utility, when the iBook is cabled directly to the hub, the printer is automatically identified when I type in the printer IP address under HP Jet Direct Socket, as 'HP Laser Jet 4000 Series' is automatically and correctly selected. This does not happen when connected wirelessly.
Any help would be greatly appreciated.

The problem is that your wireless connection is creating a different subnet. To remedy this, configure the AirPort Express so that the option to distribute IP addresses is DISABLED.

How to resolve this: Some Gmail features have failed to load due to an Internet connectivity problem. If this problem persists, try reloading the page, using the older version, or using basic HTML mode.

Keep getting this message while using Gmail "Some Gmail features have failed to load due to an Internet connectivity problem. If this problem persists, try reloading the page, using the older version, or using basic HTML mode. "
I have to use the older version of gmail for it to work properly.

now i cant even send emails out of gmail, except when using the older version.

Persistent connection problems

I am having persistent and infuriating problems connecting with iChat. When attempting to connect with a buddy the connection fails with the message "(my name) did not respond". If I try connecting with the apple test site the message is "insufficient bandwidth" although sometimes I have been able to connect. I have a G4 iBook connected to a cable modem through a DLink 524 wireless router.
I have tested my connection speed and the download tests at 1354 and the up load at 481. This seems more than sufficient for a video conference.
Quicktime streaming is set at 1.5 mbps
The router has the proper ports open
DHCP is disabled when trying to connect
All firewalls are down
I am running OS 10.4.8 and iChat 3.1.6
The buddy I am trying to connect with is using a .MAC account and AIM as am I. While trying to connect, we are able to use the text messaging with no problem.
What is going on? It already seems that even using iChat is a challenge but this is ridiculous. I would appreciate any help. Thanks

Hi Geoff,
This is a recent quote from a post by a user who had, not identical but maybe noteworthy for your set up, problems and found a way to get up and running again. I wonder if his fix might apply to your connection problems as well:
"I have been using a D-Link DI-614+ wireless router for several years in tandem with my iBook with no problems. When I switched to a new MacBook Intel Core 2 Duo 2 Ghz the problems started. The connection became extremely slow. I tried numerous things such as turning off DHCP, turning off WEP, changing the DTIM and Beacon Interval and all those things corrected the problem -- that is, until I put my MacBook to sleep then when wake-up time came the problem came back. I concluded that the speed up resulted from the re-setting of the router and not the changes in the setup. I returned the router back to their original settings and now every time I connect I automatically login to the router and restart it and the problem if fixed -- until the next time."
(D-link DI-624, DI-524, 54g This router was mentioned by several users as exhibiting the dropped-connection issue. This is unfortunate as the DI-624 is one of the third-party wireless routers that supports AppleTalk connectivity. The DI-524 was also mentioned by a few readers as occasionally having the problem.)
Maybe it is something worh giving a try,
JP

Preempting problems here- BT Home Hub-ethernet cable-Airport Extreme

OK- here is the story so far. Have a summerhouse needing broadband/telephone from the main house. It is 80 metres from the main house and so unable to use WiFi to connect to our BT Home Hub (white from 2006).
The problem we needed to overcome is the distance involved and so laid a telephone cable and an ethernet cable.
First of all the ethernet connection to the BT Home Hub:
It connects fine to the BT station and runs down the garden in its "communications pipe" with the telephone lineto connect the iMac to the internet.
BUT when we tried to reconnect the Netgear (so that the laptops could be used down at the summerhouse) which once worked fine with all the MacBooks etc to this set up it refused to work.
So I dusted off the Airport Extreme and wonder- can this be made to work as a wireless router at the end of an ethernet cable plugged into a BT Home Hub (white)?
Then- does anyone have a clue if there is a phone system in the UK which permits the transfer of calls and intercom usage between handsets where the distance is too great for handsets to communicate wirelessly? Ie use the telephone line? I have an iDect system (swish bit of kit) and can make the handsets communicate with each other as long as they are within range of each other, just not when one of them is down at the summerhouse. Anyone got a solution?

Thank you for that. I understand that if I don't do this the Airport Extreme will keep trying to take over the job, right?
As it happens I haven't got an Admin Utility in my Utilities folder. I have AirPort Disk Utility and an AirPort Utility. I am on Tiger?
OK- having checked the Airport out via the ethernet cable (and without) it is fine- it was once set up as our wireless router (in the chain after a BT Voyager or something like that, one which requires a wireless box if you wanted to use it like that). The computer could see it (and was even connected to it wirelessly at one point) but only one light was ever on on it (the centre one) with the other two flashing intermittently.
At the moment the AirPort has had to be turned off because the BT Hub was not assigning IPs and anyone who came to join the network for a new session (considering we are running 4 Mac laptops...).
What now?
:O

Huge speed drop and connection problem when answer...

About 2 days ago my internet speed dropped hugely and it's almost now unuseable. I've run a speed test and the results are below. Any idea on what to do to get this resolved?
Also, every time I answer a call or disconnect a call the broadband connection is los which is very annoying! Again, any ideas about thats causing that?
Test1 comprises of Best Effort Test: -provides background information.
Download Speed
102 Kbps
0 Kbps
250 Kbps
Max Achievable Speed
Download speedachieved during the test was - 102 Kbps
For your connection, the acceptable range of speeds is 50-250 Kbps.
Additional Information:
Your DSL Connection Rate :2432 Kbps(DOWN-STREAM), 448 Kbps(UP-STREAM)
IP Profile for your line is - 135 Kbps

AndyMc what you have supplied is the wireless connection rate between the router and your wireless adapter this is not related to anything from Bt. This is the connection rate which I am sure would be related to a channel issue more than the connection dropping. Here is a link to the help site that will assist especially the link with regards changing the wireless channels. http://bt.custhelp.com/app/answers/detail/a_id/11381/c/346,1887,1889
Make the change and then disconnect and reconnect the wireless and notice if the connection rate changes. I am sure you will get some interesting results. A good little tool you can use is an utility called inSSIDer just do a google search and install that, it will show you where there may be a conflicting channel issue, the non shared channels are 1.6.and 11. If you need to diagnose the dropping connection problem then that is a different issue to the connection one.

Strange connection problems -- software or hardware?

I've been experiencing some strange connectivity problems of late, and am wondering if it's a software or hardware issue. I'm running OS-X 10.4.11, and have noticed web-associated "drop-outs" occurring. When I'm browsing, any of the following will happen:
1. the pages will periodically stop loading, or will take forever to load a few final images.
2. the page will load with a different format (completely unformatted, like a throwback to Mosaic!).
3. the page won't load at all, and will instead give me either a "DNS error" message, or will default to my ISP's "We couldn't resolve your page" message.
4. Nothing out of the ordinary happens.
Throughout this process, the connection strength is 100%.
It seems this happens with both Firefox and Safari. Is this an issue with driver software, or is my Airport Card giving out? My computer is about 3 years old.

I have been having intermittent connection problems on several computers over many years now. We have 12 eMacs, all purchased within a few months of each other, all with 10.4.11. Some computers have almost perfect internet connection, but some are constantly losing connection. If the user just waits a few minutes, the network just comes back or if they open system preferences and renew the DHCP lease it comes back as well. We have tried replacing cables, reloading the operating system, repairing permissions, reseting safari... We are all connecting through ethernet cables through wall jacks then to a switch that is connected to our router. Our DSL provider claims it can't be wiring or a problem on their end or they would see it and we would all have problems. I am not super computer literate... Any suggestions for what I should check on the 4 or so computers that are having lots of connection problems?
Thanks for any words of wisdom!!!

RG54G2 Wireless Router Internet Connection Problem

Hi,
(apologies for the long message - trying to cover all details - summary: wireless router often drops internet connection)
I recently bought an RG54G2 Wireless Router, a CB54G2 PCMCIA Wireless card and a D-Link GWL-630 PCMCIA Wireless card. In addition to two laptops connected to the wireless router WLAN, I have two PCs (one Win WP Pro SP 1 and one Win98SE) connected to the router via wired LAN. I also have a SurfBoard SB3100 Cable Modem connected to the WAN port (this connects to my ISP - Optusnet (Australia) via DHCP).
The problem I have is that the internet connection is disconnected many times a day (often every few minutes, sometimes an hour or so). I am able to reconnect by resetting the wireless router via the wireless router configuration page. When the internet is disconnected I am still able to access the computers on the LAN/WLAN (via Windows Explorer and Ping), I am also able to ping the router and the Cable Modem, but nothing outside of the cable modem.
Also, when the internet is disconnected the System Status page indicates that the router is still connected to the internet, and the Diagnostics page passes the Test Connection test, though no external pings work.
I did not have this problem when the cable modem was connected directly to the Win98SE PC (and other PCs via ICS).
I have disabled the WLAN and the problem still exists with only the wired LAN.
I have changed numerous settings in the wireless router config page with no success (eg disabling DHCP and setting each IP address, minimising LAN and WLAN speeds to 10 and 11MBps plus others).
I have upgraded the wireless router firmware to R1.0.6.0 (no change to the problem).
Searching on Google I have found several other cases of routers with unstable internet connections (none refering to the MSI routers), but none had solutions that helped my situation (most replies suggested updating the firmware).
Any suggestions of how to make the router internet connection stable?
Thanks,
Mike

maybe this is the FIX 4 wireles router internet connection problem
please let me know if any one fix the problem with this tips
thankz
M. B. Feb 6 2004, 8:20 am hide options
Newsgroups: comp.os.ms-windows.networking.windows
From: "M. B." - Find messages by this author
Date: Fri, 06 Feb 2004 16:20:48 GMT
Local: Fri, Feb 6 2004 8:20 am
Subject: SOLUTION to my router loosing connection to Windows XP
Reply | Reply to Author | Forward | Print | Individual Message | Show original | Report Abuse
I am happy to report that after 8 days of constant battles, reboots, phone
calls, cable pulling, router changing, it seems that I finally have found a
combination that has had me using Verizon DSL account for over 12 hours so
far without any kind of interruptions.
Since so many of you tried giving me comments and suggestions, I felt that
it is necessary for me to post this here so that the next person will not
(hopefully) need to go through this hell as I did!
My original problem was that when after I purchased a D-Link Wireless Router
DI-624, I would get disconnected from Verizon DSL at least once every 2
hours or so. My internet access would "freeze" and then a little popup box
at the bottom right system tray would tell me that the "LAN cable has been
unplugged". After about a minute or so, my internet connection would be
back working This was NEVER happening during the 2+ years I was using my
Westell modem alone (running in router mode).
Please keep in mind: The problem I was having was not wireless related as
it was happening to the desktop computer to which the router/westell was
connected to!
During these last 8 days, I tried: one DI-624 wireless router, two Netgear
614v3 routers and two Linksys WRT54G v.2 routers. In addition, I received a
brand new Westell 2200 modem from Verizon. I also tried about four
different CAT-5 cables. Here is the final outcome:
I have the Linksys WRT54G (version 2) wireless router connected to the
Netgear Fast Ethernet FA310TX network card in Auto-Sense mode (using the
built-in XP drivers, as Netgear told me that there was never a newer
revision released). I have DISABLED the built-in 3Com Gigabit LOM (3C940)
network card (via the ASUS P4C800 Deluxe motherboard BIOS), DISABLED the
Zero Wireless Configuration service, and have put in the IP/Gateway/DNS
address numbers inside my Windows XP Network Connections | LAN setup. My
operating system is Windows XP Pro SP1 and the modem is a Westell 2200
configured as bridge only.
If my situation continues to be stable, I *might* try to go back to the 3Com
built-in card (disable any power management) and then re-enabling the Zero
Wireless Configuration services. But in reality, I am happy with the way
things are and have already spent enough time trying to get my router to
work with Verizon DSL without having it drop connections!
Now, the next step will be setting up the WIRELESS part of this. I don't
even yet have a laptop with me on the premises, but the 802.11g card that I
already have is the D-Link DWL-G650. I hope and assume that this will work
okay with the Linksys...
One thing I must say is that I never realized that how many problems other
users are having. I would have thought that since 802.11x has been around
in the mainstream by now 2+ years, that things would have been much more
"system friendlier". And again, my issues were not even WIRELESS related.
All 3 tech supports were not really helpful, as none of them realized that
the problem is somehow between the router and Windows XP (Ethernet card?)
loosing a connection, which of course results in Verizon DSL loosing the
connection also.
One other comment about the Netgear 614 v.3 router: A number of people have
responded to tell me that they have had this random "router resetting"
happen to them (where the routers behaves as if someone turned the power off
and then back on, and the lights flash) just as if you first turn it on). I
was lucky to witness it myself during one of the "disconnects" that I had.
This was actually the reason why I went back to try the Linksys one more
time. So, I would definitely recommend staying way from this 614 (version
3) model.
Once again - THANK YOU everyone!

LAN connection problems

Hi, I am having connection problems with my AirPort Extreme base station. I have had it working in since March 2005 just fine, that is until 2 weeks ago.
I have an iMac G5 connecting to the AirPort base through a Ethernet cable and an iBook (graphite G3) wirelessly via an airport card. The AirPort base is wired to the DSL modem via Ethernet cable. With the iMac not connected to the base station the iBook works fine on the wireless connection. The iMac connects fine to the internet when connected to the DSL modem directly. But, when I connect the iMac to the base station I am losing my internet connection to both the iBook and the iMac. I have checked the IP address being fed the iMac and am getting a 169.??? number which, as I understand is a bogus number used to signal problems, a red flag.
Any ideas?
Thanks for your help.

Make sure that you have PPPoE disabled on your iMac.
I have checked the IP address being fed the iMac and am getting a 169.??? number which, as I understand is a bogus number used to signal problems, a red flag.
An IP address starting with 169 indicates that your iMac could not properly communicatewith the DHCP server.

Strange connection problems

Wow, there are alot of syncing problems with the Classic...
Anyway, here's mine. It's not that bad, just real annoying.
Everytime I plugged it in, I see the screen that had the first box (out of four) checked that selects auto sync. If I check manually manage, it resyncs for what seems like FOREVER. After I get control back and try to manually delete or move songs it seems to resync again and it takes forever. If I disconnect and reconnect, the setting defaults back to auto sync setting.
I starting using the USB port in the back and it worked great for a while, now its back to the problem. This problem keeps me from manually managing my music- any suggestions?

I have been having intermittent connection problems on several computers over many years now. We have 12 eMacs, all purchased within a few months of each other, all with 10.4.11. Some computers have almost perfect internet connection, but some are constantly losing connection. If the user just waits a few minutes, the network just comes back or if they open system preferences and renew the DHCP lease it comes back as well. We have tried replacing cables, reloading the operating system, repairing permissions, reseting safari... We are all connecting through ethernet cables through wall jacks then to a switch that is connected to our router. Our DSL provider claims it can't be wiring or a problem on their end or they would see it and we would all have problems. I am not super computer literate... Any suggestions for what I should check on the 4 or so computers that are having lots of connection problems?
Thanks for any words of wisdom!!!

Unending connectivity problems -- and Desktop Help...

I'm wasting so much time on connectivity problems that it's positively wearying. Prior to the installation of BT Infinity here in April, I had a low quality broadband service because of the length of the line from the exchange: if I could get a download speed of 1.2Mbps and an upload of a quarter of that, I was doing well.
BT advised that thanks to fibre optic, my Internet should run much faster. So we had Infinity installed. I'm registered with Speedtest.net so am able to see my performance record.
The average download speed is now aroun d 6Mbps and the average upload, more than that at 7Mbps. How an upload speed can consistently be faster than a download escapes me.
But I'm not familiar with the ways of Internet connectivity and try as a I might, can't get my head around it.
This desktop computer runs Vista OS. Vista was **bleep** when it came out and is renowned for its botched handling of Internet connections. So I'm not blaming BT for the literally unending connectivity problems that are occurring now, with line drops, speeds slowing to a crawl, and no guarantee that any connection will last. But it would be good to actually use BT software to help fathom out what's going wrong here, and today's typical morning which looks like this:
1) Boot up computer. Automatic connection to hub via Netgear USB wireless adapter. Hub is on ground floor of this 3-storey property but signal strength from hub is excellent, as confirmed by inSSIDer monitoring, currently showing 54 with no other networks anywhere near that figure.
2) Perhaps 5 minutes after connection established, it's then lost. 'Local Only' is displayed. This is, apparently, a known Vista problem. But Microsoft has issued a fix for it. I know this, because it took 100 hours of ploughin g the Net to find out that MS had finally admitted to one more Vista screw-up. I've used the Microsoft router "fix it" before and it didn't work ("failed to process") so uninstalled it and have DL'd it again now and run it. This time it says it has fixed everything.
3) Computer is re-booted to make the fix effective. Computer connects to Internet. Speedtest.net check yet again confirms that upload speed is faster than download speed.
4) Connection dies. So much for Microsoft Fix It.
5) Windows diagnostics reports that it can re-set the IP profile (or something.) I click yes. The re-set goes through. Connectivity is restored. 10 minutes later, connectivity is lost. Just a red X in the tray. No connection of any kind, not even that daft 'Local Connection' only alert.
6) Reboot. Yet again. BT Desktop Help was installed here and ran OK when we were using our Netgear DSG34 router. But since the change to the BT Hub, the BT program has never run at all. So-oo. . . It has been uninstalled. And then re-DL'd and re-installed. And though the installation has been completed, clicking on 'launch' has failed to launch anything. But anyway. An hour ago, in one of the brief periods today when the Internet connection was holding up, I Revo-ed out the earlier install, DL'd BT desktop Help and re-installed it. . . and I'm still at the same stage as always, with a Firefox browser page that's open and completely blank and has been for the past 30 minutes. The URL is:
file:///C:/Program%20Files/BT%20Broadband%20Desktop%20Help/btbb/Start.html
Repeated page re-loading gets nowhere. Malwarebytes PRO is turned OFF to prevent any possibility of blocking and the antivirus is termporaily SUSPENDED. This PC runs on Windows standard firewall but even turning that OFF doesn't get the page to load. Copying the address into Internet Explorer in case there's a Firefox problem merely results in Firefox being opened and the same blank page running there.
7) After all that. . . Connection lost yet again and this time, Windows cannot connect at all. It reports that the "wireless network security key is not correct". I happen to know that it is, because this is maybe the 20th time it has reported this in the past 10 days and every time I have to key in the "correct" key all over again. . . at which point Windows still says it isn't correct and cannot repair.
Turning off the computer completely, unplugging from the wall, holding in the power switch for a full minute to clear the circuits, traipsing up and dowen three flights of stairs to turn off the hub, then wait, then turn the power back onm again. . . Ah, wot fun times I'm having here with my particular versioin of Infinity (as in, an infinity of connectivcity problems.)
Summary: I seem to be being simultaneously hit with one issue after another.
I'm bewildered as to why ever since Infinity was installed here, my upload speed is generally faster than my download speed. I'm not happy with endless Internet connection failures though am thinking that Vista is playing a large part here with its "wrong security key" and unending 'Local Only / Limited Connection' failures. I do miss my Netgear router and the ability to access a fantastic help menu and re-boot directly from the desktop without having to keep going up and down three flights of sdtairs to do so (I haven't been able to find out how toe access the BT Hub remotely.)
Above all though: I'm really tired of repeatedly trying to run freshly downloaded and installed BT Desktop Help software but getting no further than a blank page because the program has stalled.
If anyone has any advice / suggestions, other than to buy a carrier pigeon, that'd be much appreciated.
Thanks.

Thanks again to John and gg30340. Here's an update:
1) BT Desktop Help removed completely from this computer. The uninstaller itself mopped up everything, which surprised me. But anyway.
2) Bt Home Hub manager set up and working. Had to input serial number and create new password. All of this sounds fairly easy and would be if one had the device near the desk. But the idiots who built this property shoved the BT master socket inside the garage next to the door. Our two home computers are on the third floor. To ensure the wireless signal strength is OK, the Hub and Infinity module/device/whatever it's called are on a high shelf. It's a major job to even reach the darn things, never mind read the labels seeing as how the BT Infinity engineer was good enough to tidy up the cabling and make a very tight connection to the wall socket.
3) I had hoped to be able to back up the Hub's settings, seeing as the software provides for Advanced Settings / System / Backup. But not on mine (Hub 3.0). All that System allows is choosing which internet clock to define the accurate time. Everything else in System is just a pattern of short lines as if trying to indicate that there's some text there but it's invisible.This is now my second encounter with BT software which, for whatever reason, isn't functioning as it should on this PC.
4) Hub reset to factory fresh, according to BT guide.
5) Reset appears to have achieved nothing apart from requiring the password to be popped in again. After reset, it wasn't even possible to connect to the hub manager. Internet connectivity was eventually established for all of 30 seconds and then, gone.
6) Computer was shut down and then booted anew. Internet connectivity is still. . . dreadful. One minute everything's fine and then, literally,. the next minute a webpage won't load. Even opening the Hub Manager has taken three attempts, i.e., disconnecting from the Internet, re-connecting, failing, and trying twice more until success. Yet all the time these failures are occurring, the tray icon is showing a steady, unwavering green icon for Local and Internet access -- despite the fact, there manifestly isn't any.
7) Speedtest. net tests are actually showing upload and download 'trajectories' going slower and slower and finally halting at some point on the arc, then after a period of up to 30 seconds, suddenly becoming animated again. Speed test results with broadband speed checker UK and Think Broadband's checker are so at variance with one another, and with Speedtest, net, that it seems all three are using different technologies in pursuit of the same thing. Either way, upload speeds continue to be much, much faster than download speeds, a state of affairs I certainly have never encountered before.
8) Speedtest net tests taken in the past 10 minutes, with one test following on from its predecessor, begin at 8.24 down/8.88 up, followed by 5.24 down / 6.40 up, followed by a mind-numbingly lonnnnng 0.62 down / 8.70 up -- in other words, a continuous yo-yoin g of Internet connectivity to the pooint that it actually might as well not even be here (I've had to make five attempts just to get on to this forum. . .)
9) BT Speedtest will necessitate disconnection of everything downstairs and all boxes being lugged up here. This is actually going to require uncoililng tied-off cabling and hanging off a stepladder to do so -- though I surely can't be the only person in Britain who doesn't have a nice, handy BT master socket in their study or lounge. That said though: until we switched to Infinity, we *never* experienced these kinds of horrendous connectivity problems and never had need to unplug the Netgear router downstairs and bring it upstairs to connect directly to tjhe desktop PC so BT's own test could be run.
I'll just have to get to work dismantling stuff tomorrow. However, I have to say that after a factory re-set which has changed nothing at all, I'm beginning to think there's a problem with the BT line itself (hence why I'm happy to follow the advice here, though less than happy at the prospect of the messing about involved.)
Thanks, you two, for your patient help, and also for clarifying the situation re the three signal paths being shown on inSSIDer. At least I know that's usual now! And now, hopefully, when I press 'Post', I won't be faced with an endlessly spinning Firefox circle culminating in what may well be, or seem to be, the 57,938th time today of seeing "Page Not Found". . .

Cache and/or Connection problems under load

I have a Kodo web app that's been running just fine in
production for many months now. However, recently the web
traffic has shot up by a huge amount, literally overnight.
But unfortunately, it's caused the app to fail very ungracefully
under the strain.
It's been a crazy few days, and I haven't been able to do
very much analysis because of higher priorities. But from
what I have been able to gleen, it now looks like Kodo is
the most likely culprit. From what I've read in other messages
here, it appears others may have been experiencing similar
problems.
My environment: Redhat Linux 8, Postgres 7.3.4 with the
included JDBC3 driver, Apache 1.3.x, Tomcat 4.1.x and the
webapp connector. Similar behavior was seen with Apache 2.x,
Tomcat 4.1.x and the JK2 connector (that was on the new machine
I setup to handle the new traffic, which, of course, died the
night before).
As I mentioned, this app has been running reliably for
months with no problems. But when placed under heavy load,
it appears to get into some sort of pathological state where
it slows down dramatically (asymptotically?) to the point where
it's effectively locked up. In one case, where the app was
left running for several hours in this state, requests were
taking 90 minutes to complete (normal is 1-5 seconds).
From what I can deduce, there seem to be four things
going on, three of which have been mentioned in recent threads
here:
1) Excessive memory consumption. When the app is
operating normally, I see fairly flat memory usage for
the JVM process. Under load, the JVM steadily expands
until it hits its heap limit. I've gotten OutOfMemory
exceptions with a heap size of 350MB, which should be plenty.
2) Level 2 cache locking issues. I've seen dozens of
threads waiting on a lock in the DataCache code. Not sure
if there's a deadlock happening here or just that the
threads are waiting on a lock that's being held for a long time.
3) Database Connection leaks or contention. I see threads
spinning in the DataSource code trying to get a connection.
I also see dozens of connections from the Postgres side which
seem to be sitting idle, but in the middle of a transaction.
When things get bad, I also see exceptions being thrown because
of timeouts waiting for a connection to become available. It's
a web app, PMs should not be tied up for more than a few seconds.
4) CPU usage pegged or nearly so for the JVM. I suspect
this is related to #3. Something very bad is going on here.
If I stop all inbound requests to the JVM when it's in this
bad state, it will continue to burn CPU at 90%+ for a very
long time. I think it will eventually finish what it's doing,
but I haven't had the luxury of waiting for it. It's definitely
not a linear slowdown proportional to the load.
Attached are my kodo.properties file and some thread stack
traces along with some comments. Any advice would be greatly
appreciated. This is not a complicated app nor am I doing
anything unusual. It doesn't seem logical that Kodo could
breakdown so dramatically under load, so I'm hoping it's some
sort of interaction thing that I can work around.
Thanks.
Ron Hitchens {mailto:[email protected]} RonSoft Technologies
(510) 494-9597 (Home Office) http://www.ronsoft.com
(707) 924-3878 (fax) Bit Twiddling At Its Finest
"Born with a broken heart" -Kenny Wayne Shepard

Please read prior posts regarding level 2 cache. It is unusable under stress
as far I am concerned. Basically entire cache gets locked on any database
read. Makes it very unscalable
Are you using 2.5.3? It will request a connection from a pool every time it
resolves reference to a PC even if it is cached in PM and therefore Kodo
does not need to read any. As result if you iterate over 100 objects in your
query and for each object resolve reference to another object (always the
same) kodo will request 100 database connections from the pool (and note
they issue rollback on every time they return a connection to the pool so
getting connection might be fairly expensive)
In conjunction with level 2 cache contention this causes application to go
into a stupor.
Try to go back to 2.5.2 (or may be 2.5.4 they promised in the near future
with a workaround) or use "persistent-manager" connection retention if you
discard PM after each HTTP invocation - it will take care of connection
pooling issue. As far as L2 cache I was unable to find any work around so
far - see if you might be better of without cache. You might if your object
graph is not very complex
"Ron Hitchens" <[email protected]> wrote in message
news:[email protected]...
>
I have a Kodo web app that's been running just fine in
production for many months now. However, recently the web
traffic has shot up by a huge amount, literally overnight.
But unfortunately, it's caused the app to fail very ungracefully
under the strain.
It's been a crazy few days, and I haven't been able to do
very much analysis because of higher priorities. But from
what I have been able to gleen, it now looks like Kodo is
the most likely culprit. From what I've read in other messages
here, it appears others may have been experiencing similar
problems.
My environment: Redhat Linux 8, Postgres 7.3.4 with the
included JDBC3 driver, Apache 1.3.x, Tomcat 4.1.x and the
webapp connector. Similar behavior was seen with Apache 2.x,
Tomcat 4.1.x and the JK2 connector (that was on the new machine
I setup to handle the new traffic, which, of course, died the
night before).
As I mentioned, this app has been running reliably for
months with no problems. But when placed under heavy load,
it appears to get into some sort of pathological state where
it slows down dramatically (asymptotically?) to the point where
it's effectively locked up. In one case, where the app was
left running for several hours in this state, requests were
taking 90 minutes to complete (normal is 1-5 seconds).
From what I can deduce, there seem to be four things
going on, three of which have been mentioned in recent threads
here:
1) Excessive memory consumption. When the app is
operating normally, I see fairly flat memory usage for
the JVM process. Under load, the JVM steadily expands
until it hits its heap limit. I've gotten OutOfMemory
exceptions with a heap size of 350MB, which should be plenty.
2) Level 2 cache locking issues. I've seen dozens of
threads waiting on a lock in the DataCache code. Not sure
if there's a deadlock happening here or just that the
threads are waiting on a lock that's being held for a long time.
3) Database Connection leaks or contention. I see threads
spinning in the DataSource code trying to get a connection.
I also see dozens of connections from the Postgres side which
seem to be sitting idle, but in the middle of a transaction.
When things get bad, I also see exceptions being thrown because
of timeouts waiting for a connection to become available. It's
a web app, PMs should not be tied up for more than a few seconds.
4) CPU usage pegged or nearly so for the JVM. I suspect
this is related to #3. Something very bad is going on here.
If I stop all inbound requests to the JVM when it's in this
bad state, it will continue to burn CPU at 90%+ for a very
long time. I think it will eventually finish what it's doing,
but I haven't had the luxury of waiting for it. It's definitely
not a linear slowdown proportional to the load.
Attached are my kodo.properties file and some thread stack
traces along with some comments. Any advice would be greatly
appreciated. This is not a complicated app nor am I doing
anything unusual. It doesn't seem logical that Kodo could
breakdown so dramatically under load, so I'm hoping it's some
sort of interaction thing that I can work around.
Thanks.
Ron Hitchens {mailto:[email protected]} RonSoft Technologies
(510) 494-9597 (Home Office) http://www.ronsoft.com
(707) 924-3878 (fax) Bit Twiddling At Its Finest
"Born with a broken heart" -Kenny Wayne Shepard
With cahce enabled, 2.5.3
Here the app had recently slowed down and then effectively locked up.
There where many outstanding web requests that were not receiving output.
At this point most threads seemed to be waiting at the same location.
There were a large number of active database connections and most of
them had open transactions (according to pg_stat_activity). The app
was not responding to any web requests.
It would seem that db transactions had been started, then the thread
got stuck for a long time on a synchronization lock in the cache lookup.
Below are two randomly chosen thread stack dumps.
Thread-72[1] where
[1] java.lang.Object.wait (native method)
[2] java.lang.Object.wait (Object.java:429)
[3]oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock$ReaderLock.acquir
e (WriterPreferenceReadWriteLock.java:169)
[4]com.solarmetric.kodo.runtime.datacache.AbstractCacheImpl.acquireReadLock
(AbstractCacheImpl.java:384)
[5]com.solarmetric.kodo.runtime.datacache.TimedDataCache.acquireReadLock
(TimedDataCache.java:256)
[6] com.solarmetric.kodo.runtime.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:595)
[7] com.solarmetric.kodo.runtime.StateManagerImpl.loadFields(StateManagerImpl.java:2,330)
[8] com.solarmetric.kodo.runtime.StateManagerImpl.isLoaded(StateManagerImpl.java:897)
[9] com.europeasap.data.City.jdoGetname (null)
[10] com.europeasap.data.City.getName (City.java:39)
[11] com.europeasap.form.CustomerBookingForm.populateDepartureCityInfo(CustomerBookingForm.java:922)
[12] com.europeasap.form.CustomerBookingForm.onetimeInit(CustomerBookingForm.java:871)
[13] com.europeasap.form.CustomerBookingForm.populatePackageInfo(CustomerBookingForm.java:880)
[14] com.europeasap.action.CustomizeTrip.perform (CustomizeTrip.java:66)
[15] org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.java:1,787)
[16] org.apache.struts.action.ActionServlet.process(ActionServlet.java:1,586) [17]
org.apache.struts.action.ActionServlet.doGet (ActionServlet.java:492)
[18] javax.servlet.http.HttpServlet.service (HttpServlet.java:740)
[19] javax.servlet.http.HttpServlet.service (HttpServlet.java:853)
[20] org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
[21] org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
[22] org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
[23]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[24] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[25] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[26] org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
[27]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[28] org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
[29]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:641)
[30] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[31] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[32] org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2,415)
[33] org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
[34]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[35] org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
[36]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:641)
[37] org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
[38]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:641)
[39] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[40] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[41] org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
[42]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[43] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[44] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[45] org.apache.catalina.connector.warp.WarpRequestHandler.handle (null)
[46] org.apache.catalina.connector.warp.WarpConnection.run (null)
[47] java.lang.Thread.run (Thread.java:534)
Thread-64[1] where
[1] java.lang.Object.wait (native method)
[2] java.lang.Object.wait (Object.java:429)
[3]oswego.cs.dl.util.concurrent.WriterPreferenceReadWriteLock$ReaderLock.acquir
e (WriterPreferenceReadWriteLock.java:169)
[4]com.solarmetric.kodo.runtime.datacache.AbstractCacheImpl.acquireReadLock
(AbstractCacheImpl.java:384)
[5]com.solarmetric.kodo.runtime.datacache.TimedDataCache.acquireReadLock
(TimedDataCache.java:256)
[6] com.solarmetric.kodo.runtime.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:595)
[7] com.solarmetric.kodo.runtime.StateManagerImpl.loadField(StateManagerImpl.java:2,248)
[8] com.solarmetric.kodo.runtime.StateManagerImpl.isLoaded(StateManagerImpl.java:899)
[9] com.europeasap.data.HotelPrices.jdoGetseasonalPrices (null)
[10] com.europeasap.data.HotelPrices.normalizeIndex(HotelPrices.java:113)
[11] com.europeasap.data.HotelPrices.getCost (HotelPrices.java:45)
[12] com.europeasap.logic.CostHelper.findLowestHotel(CostHelper.java:181)
[13] com.europeasap.logic.CostHelper.computeBasePackageCost(CostHelper.java:297)
[14] com.europeasap.logic.CostHelper.computeFinalPackageCost(CostHelper.java:246)
[15] com.europeasap.form.CustomerBookingForm.updateDisplayCosts(CustomerBookingForm.java:1,440)
[16] com.europeasap.form.CustomerBookingForm.updateCustomizeDisplayInfo(CustomerBookingForm.java:1,407)
[17] com.europeasap.action.CustomizeTrip.perform (CustomizeTrip.java:68)
[18] org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.java:1,787)
[19] org.apache.struts.action.ActionServlet.process(ActionServlet.java:1,586) [20]
org.apache.struts.action.ActionServlet.doGet (ActionServlet.java:492)
[21] javax.servlet.http.HttpServlet.service (HttpServlet.java:740)
[22] javax.servlet.http.HttpServlet.service (HttpServlet.java:853)
[23] org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
[24] org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
[25] org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
[26]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[27] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[28] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[29] org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
[30]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[31] org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
[32]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:641)
[33] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[34] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[35] org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2,415)
[36] org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
[37]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[38] org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
[39]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:641)
[40] org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
[41]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:641)
[42] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[43] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[44] org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
[45]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[46] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[47] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[48] org.apache.catalina.connector.warp.WarpRequestHandler.handle (null)
[49] org.apache.catalina.connector.warp.WarpConnection.run (null)
[50] java.lang.Thread.run (Thread.java:534)
while running slow, 2.5.3
At this point, the app had been running several hours normally, then
apparently slowed down and locked up while I was away. When looking
at the app threads and database activity, everything appeared idle.
No transactions seemed to be open in the db. But the app was not
behaving normally. Web requests that did not make use of JDO worked
fine (but slow). But requests that hit the db either blocked or were
very slow to respond.
Looking back at the log, there had been a large number of requests
that threw exceptions because they could not get a connection within
five seconds.
Most threads were idle, waiting on read, but some were in the state
shown by the following two stack dumps. Unlike the cache threads above,
they did not seem to be waiting for a lock to be granted, they seemed
to be spinning in the connection management code. Apparently trying
to get a connection. I suspended and resumed the same thread repeatedly
and it always seemd to be doing the same thing. Single stepping was
very difficult because the debugger was slow to respond, apparently
because of other threads also busy spinning.
Postgres indicated that there where lots of connections open and
that they were all idle, so there should not have been a shortage
of connections in the pool. There are two mysteries here: 1) why
can't this thread get a connection? and 2) Why is it busy spinning?
Thread-56[1] where
[1]com.solarmetric.datasource.PreparedStatementCache$CacheAwareConnection.prepa
reStatement (PreparedStatementCache.java:184)
[2]com.solarmetric.datasource.PreparedStatementCache$CacheAwareConnection.prepa
reStatement (PreparedStatementCache.java:169)
[3] com.solarmetric.datasource.ConnectionWrapper.prepareStatement(ConnectionWrapper.java:199)
[4]com.solarmetric.kodo.impl.jdbc.schema.dict.AbstractDictionary.isClosed
(AbstractDictionary.java:1,912)
[5]com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.getConnectionFromFact
ory (SQLExecutionManagerImpl.java:186)
[6] com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.getConnection(SQLExecutionManagerImpl.java:147)
[7]com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.newSQLExecutionManag
er (JDBCStoreManager.java:828)
[8]com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.getSQLExecutionManag
er (JDBCStoreManager.java:714)
[9]com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.getDatastoreConnecti
on (JDBCStoreManager.java:287)
[10]com.solarmetric.kodo.runtime.datacache.DataCacheStoreManager.getDatastoreCon
nection (DataCacheStoreManager.java:465)
[11] com.solarmetric.kodo.runtime.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:591)
[12] com.solarmetric.kodo.runtime.StateManagerImpl.loadFields(StateManagerImpl.java:2,330)
[13] com.solarmetric.kodo.runtime.StateManagerImpl.isLoaded(StateManagerImpl.java:897)
[14] com.europeasap.data.City.jdoGetname (null)
[15] com.europeasap.data.City.getName (City.java:39)
[16] com.europeasap.form.CustomerBookingForm.populateDepartureCityInfo(CustomerBookingForm.java:922)
[17] com.europeasap.form.CustomerBookingForm.onetimeInit(CustomerBookingForm.java:871)
[18] com.europeasap.form.CustomerBookingForm.populatePackageInfo(CustomerBookingForm.java:880)
[19] com.europeasap.action.CustomizeTrip.perform (CustomizeTrip.java:66)
[20] org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.java:1,787)
[21] org.apache.struts.action.ActionServlet.process(ActionServlet.java:1,586) [22]
org.apache.struts.action.ActionServlet.doGet (ActionServlet.java:492)
[23] javax.servlet.http.HttpServlet.service (HttpServlet.java:740)
[24] javax.servlet.http.HttpServlet.service (HttpServlet.java:853)
[25] org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
[26] org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
[27] org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
[28]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[29] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[30] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[31] org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
[32]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[33] org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
[34]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:641)
[35] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[36] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[37] org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2,415)
[38] org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
[39]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[40] org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
[41]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:641)
[42] org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
[43]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:641)
[44] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[45] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[46] org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
[47]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[48] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[49] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[50] org.apache.catalina.connector.warp.WarpRequestHandler.handle (null)
[51] org.apache.catalina.connector.warp.WarpConnection.run (null)
[52] java.lang.Thread.run (Thread.java:534)
Thread-56[1] where
[1]com.solarmetric.datasource.DataSourceImpl$AbstractPool.findConnection
(DataSourceImpl.java:826)
[2] com.solarmetric.datasource.DataSourceImpl$AbstractPool.getConnection(DataSourceImpl.java:605)
[3] com.solarmetric.datasource.DataSourceImpl.getConnection(DataSourceImpl.java:363)
[4] com.solarmetric.datasource.DataSourceImpl.getConnection(DataSourceImpl.java:356)
[5]com.solarmetric.kodo.impl.jdbc.runtime.DataSourceConnector.getConnection
(DataSourceConnector.java:63)
[6]com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.getConnectionFromFact
ory (SQLExecutionManagerImpl.java:185)
[7] com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.getConnection(SQLExecutionManagerImpl.java:147)
[8]com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.newSQLExecutionManag
er (JDBCStoreManager.java:828)
[9]com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.getSQLExecutionManag
er (JDBCStoreManager.java:714)
[10]com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.getDatastoreConnecti
on (JDBCStoreManager.java:287)
[11]com.solarmetric.kodo.runtime.datacache.DataCacheStoreManager.getDatastoreCon
nection (DataCacheStoreManager.java:465)
[12]com.solarmetric.kodo.runtime.datacache.DataCacheStoreManager.initialize
(DataCacheStoreManager.java:519)
[13] com.solarmetric.kodo.runtime.StateManagerImpl.loadInitialState(StateManagerImpl.java:215)
[14]com.solarmetric.kodo.runtime.PersistenceManagerImpl.getObjectByIdFilter
(PersistenceManagerImpl.java:1,278)
[15] com.solarmetric.kodo.runtime.PersistenceManagerImpl.getObjectById(PersistenceManagerImpl.java:1,179)
[16]com.solarmetric.kodo.runtime.datacache.query.CacheAwareQuery$CachedResultLis
t.get (CacheAwareQuery.java:432)
[17] java.util.AbstractList$Itr.next (AbstractList.java:421)
[18] com.europeasap.form.CustomerBookingForm.populateDepartureCityInfo(CustomerBookingForm.java:919)
[19] com.europeasap.form.CustomerBookingForm.onetimeInit(CustomerBookingForm.java:871)
[20] com.europeasap.form.CustomerBookingForm.populatePackageInfo(CustomerBookingForm.java:880)
[21] com.europeasap.action.CustomizeTrip.perform (CustomizeTrip.java:66)
[22] org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.java:1,787)
[23] org.apache.struts.action.ActionServlet.process(ActionServlet.java:1,586) [24]
org.apache.struts.action.ActionServlet.doGet (ActionServlet.java:492)
[25] javax.servlet.http.HttpServlet.service (HttpServlet.java:740)
[26] javax.servlet.http.HttpServlet.service (HttpServlet.java:853)
[27] org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
[28] org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
[29] org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
[30]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[31] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[32] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[33] org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
[34]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[35] org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
[36]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:641)
[37] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[38] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[39] org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2,415)
[40] org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
[41]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[42] org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
[43]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:641)
[44] org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
[45]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:641)
[46] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[47] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[48] org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
[49]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[50] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[51] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[52] org.apache.catalina.connector.warp.WarpRequestHandler.handle (null)
[53] org.apache.catalina.connector.warp.WarpConnection.run (null)
[54] java.lang.Thread.run (Thread.java:534)
With cache disabled 2.4.3
This run was an accident. I inadvertently ran the app with the older
2.4.3 version of Kodo, with the cache disabled. This one got into trouble
almost immediately. It also seemed to lockup with lots of opentransactions
in the db. It's also interesting that these two threads also seem to be
hanging around the same method as in 2.5.3.
Thread-63[1] where 0x9f9
[1]com.solarmetric.datasource.PreparedStatementCache$CacheAwareConnection.prepa
reStatement (PreparedStatementCache.java:184)
[2] com.solarmetric.datasource.ConnectionWrapper.prepareStatement(ConnectionWrapper.java:377)
[3]com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.prepareStatementInter
nal (SQLExecutionManagerImpl.java:807)
[4]com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.executePreparedQueryI
nternal (SQLExecutionManagerImpl.java:761)
[5]com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.executeQueryInternal
(SQLExecutionManagerImpl.java:691)
[6] com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.executeQuery(SQLExecutionManagerImpl.java:372)
[7] com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.executeQuery(SQLExecutionManagerImpl.java:356)
[8] com.solarmetric.kodo.impl.jdbc.ormapping.ClassMapping.loadByPK(ClassMapping.java:950)
[9] com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.initialize(JDBCStoreManager.java:263)
[10] com.solarmetric.kodo.runtime.StateManagerImpl.loadInitialState(StateManagerImpl.java:174)
[11]com.solarmetric.kodo.runtime.PersistenceManagerImpl.getObjectByIdFilter
(PersistenceManagerImpl.java:1,023)
[12] com.solarmetric.kodo.runtime.PersistenceManagerImpl.getObjectById(PersistenceManagerImpl.java:942)
[13] com.solarmetric.kodo.impl.jdbc.ormapping.OneToOneMapping.load(OneToOneMapping.java:147)
[14] com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.load(JDBCStoreManager.java:375)
[15] com.solarmetric.kodo.runtime.StateManagerImpl.loadField(StateManagerImpl.java:2,035)
[16] com.solarmetric.kodo.runtime.StateManagerImpl.isLoaded(StateManagerImpl.java:720)
[17] com.europeasap.data.CityMarkup.jdoGetcity (null)
[18] com.europeasap.data.CityMarkup.getCity (CityMarkup.java:30)
[19] com.europeasap.logic.CostHelper.getCityMarkup (CostHelper.java:81)
[20] com.europeasap.logic.CostHelper.computeBasePackageCost(CostHelper.java:289)
[21] com.europeasap.logic.CostHelper.computeFinalPackageCost(CostHelper.java:246)
[22] com.europeasap.form.CustomerBookingForm.updateDisplayCosts(CustomerBookingForm.java:1,440)
[23] com.europeasap.form.CustomerBookingForm.updateCustomizeDisplayInfo(CustomerBookingForm.java:1,407)
[24] com.europeasap.action.CustomizeTrip.perform (CustomizeTrip.java:68)
[25] org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.java:1,787)
[26] org.apache.struts.action.ActionServlet.process(ActionServlet.java:1,586) [27]
org.apache.struts.action.ActionServlet.doPost (ActionServlet.java:510)
[28] javax.servlet.http.HttpServlet.service (HttpServlet.java:760)
[29] javax.servlet.http.HttpServlet.service (HttpServlet.java:853)
[30] org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
[31] org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
[32] org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
[33]org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invok
eNext (StandardPipeline.java:643)
[34] org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
[35] org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
[36] org.apache.catal

IPOD CONNECTIVITY PROBLEM WITH WINDOWS XP VIA USB 2.0

Enough is enough.
I have an ipod touch and I am having difficulty connecting it to my pc via usb 2.0.
I have searched the entire web and came across many cases similar or the same as mine. It's time for apple to face the fact that there is something wrong with either the apple mobile service or the apple usb drivers or the itunes software that causes connectivity problems with win xp.
For the record my case is this:
I got my itouch 3 days ago. I installed itunes 8.0. Then I plugged in my ipod to a usb extension cable port connected to a usb at the back of my desktop computer. At first I got the "this usb device can perform faster if you plug it to a usb 2.0 port etc." message. So I did. I removed the extension cable and connected it directly to one of the usb ports at the back. The first time it synchronized, it seemed fine. So I decided before I do anything with it, to update it to the 2.1 version. I made my account and bought (very bad policy there apple, it should be free or at least cheeper than 8 euro) the 2.1 update. I clicked to update the i-touch. While it was updating it crashed during the restore process (because it was disconnected but I didn't know that at the time). I unplugged it, resetted and plugged it back and managed to continue the restoring process until it was updated. After figuring out itunes I chose the "manage files manually option", kept everything unchecked in the sync options except the applications. I noticed there were random disconnections here and there but I didn't pay much attention because they weren't very frequent.
The next day I plug in the touch again and suddenly I hear that annoying "connecting-disconnecting" sound from windows while my touch kept disappearing and reappearing in itunes. Suddenly my playlists disappeared from the touch. Nothing was in the touch any more. How could that happen since i had chosen to manage my files manually instead of synchronizing? So I unplugged the touch again, restarted the touch, restarted the pc, stopped and restarted the apple mobile service, unistalled and reinstalled itunes, searched microsoft support and read many usb troubleshooting documents in the web. Nothing happened. The touch randomly keeps disconnecting from the usb. I eventually managed to put my stuff back in and keep them there.
Here's what I know:
1) There is nothing wrong with my usb ports. I don't use usb hubs, they are usb 2.0, the voltage (500mA) is correct in the device manager. Everything else works fine there.
2) The ipod touch does not support disk mode so you can't see it under "my computer" and this is not a problem.
3)There is nothing wrong with the ipod, it works perfectly.
4) This is not a usb cable physical problem.
5) The five R's are irrelevant with this situation.
Uninstalling and reinstalling itunes doesn't solve the problem, neither does hard resetting the ipod.
6) Older PC configurations seem to be more affected by this but it doesn't have to do with unsupported specific chipsets.
Here's what needs investigating:
1) There may be a problem with the apple mobile service running on win XP.
2) There may be a problem with the apple usb driver and win XP or older motherboards.
3) There may be a 2.1 firmware issue with usb 2.0 connectivity.
Workaround so you don't go nuts:
Use USB 1.1 instead of 2.0. It is A LOT slower but it keeps the connection stable and you can work with the ipod. Just start copying and go do something else for the next hour. So far it works for me.
This is a serious issue that needs immediate attention. I've stumbled across forum discussions dating to 2005 with this problem (with older ipods of course).

I think this needs to be put down to the eternal PC/Mac argument. Apple dont want to fix this as they want everyone to buy a Mac. Its a business, understandable, but in turning away PC buyers they alienate a huge percentage of the market.
Now, I had my first iTouch stolen. It synced, for the most part, very well, just occasionally it removed settings and music, but ticking boxes each time I sync'd sorted that, Its a workflow procedure.
SO, now that my Touch has been replaced, iTunes cannot see it. The PC can identify it on USB1 or USB2, My work lap top can see it and has indeed upgraded it to V2 software, just in case that was the issue, but no. For some really weird reason Itunes on my desktop cannot see the new pod.
This does not make sense with the argument that Apple software doesnt work on a PC, but doesnt help that none of the Apple support staff, phone or in-store have a clue about Windows operations.
Because my Touch has now been trying to connect to 6 separate installs of itunes, multiple USB ports, multiple USB cables, a complete overhaul of the registry settings (everything else still works), and the loss of all my previous settings and backups from the last Touch... but still, the PC says its an ipod but cant install it, iTunes sits there, dumb.
The only thing I can do now is sell the device as brand new as it has never had music on it and is just a week old...
It has changed the MiniMac I was going to have for my new flat screen TV into a PC and suggests that anyone with a PC should stick to devices that run on PC, of which there are many, just without the user interface of the dear departed IPod Touch.
Thanks

Persistent DSL connection problems (distance to DSL hub)

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