DB connection span

Hi All,
What happens if a open DB connection is not closed by the programmer.
How long does the DB connection lasts for?

What happens if a open DB connection is not closed by the programmer.Someone can use your connection and create problems to you. for example, updating data or deleting data. You must close your connection before you leave.
How long does the DB connection lasts for?It depends.
to determine how long an user connection can exist you can create a profile (or add to an existing one) modifying this parameters:
-IDLE_TIME
-connect time
-SESSIONS_PER_USER
-CPU_PER_SESSION
-CPU_PER_CALL

Similar Messages

Redundant connection, spanning tree protocoll

Between two buildings i want to establish a redundant network connection. If one of the connections fails, the other connection shall transport the network data automatically. There is a SRW2024 in every building. They are connected by a fibre-cable between the miniGBIC ports 24 of every switch. This combination exists two times.
In one building (Keller in the appended pdf-file) there is a rack with MPEG4 codecs. This rack has a built in unmanaged switch with two ports. This ports are patched to one port of the SRW2024.
In the other building (Pforte) there is a PC which receives the MPEG4 streams. It is connected to a fifth SRW2024 which receives the streams of the two connections on ports 1 and 2.
In my first try i have enabled the spanning tree protocoll in all 5 switches. The PC received the MPPEG4 streams. But when i disconnect one of the fibre connections the system comes to an unstable condition where the MPEG4 streams are interrupted sometimes and no network connection is possible.
Even if i reconnect the fibre, the system switches the streams off and on and was not stable.
Where is my fault, is it enough to configure only the fifth switch for spanning tree ?
It would be glad if anyone has an idea to solve the problem.
Michael

Hi Michael,
I have no experience with the series, but I see in the documentation that you can stack the switches. If you stack they, I think they will work as one logical one like a 3750 e.g. and you can use a Port-channel configuration.
If I`m wrong, we should take a close look to the STP config, to make sure which one will be the root and which ports are up to make the situations "controlled"
regards,
Sebastian

Jhs Lovs open new db connection

We are using jheadstart 11.1.1.3.35. There is a need to minimise the database connections opened by the application. However we have noticed that all jhs LOVs in the application are opening a new database connection instead of using the db connection of the root application module. Is there any way to avoid this type of behaviour?
Thanks

Dear Steven,
I use the default configuration. Does it have to do that the development platform is linux, I doubt about it. In 5 applications using jheadstart 1.1.1.3.35 and jdeveloper 11.1.1.4.0, we encounter the same behaviour:
When we open a jhs lov for the first time a new connection spans. Then this connection is reused for any subsequent jhs lov calls.
So for every root application module with jhs lovs we always have 2 db connections (when we query v$session) instead of 1, so 5 root ams with jhs lovs will span 10 db connections.
I tried to change the transaction option to Always Use Existing Transaction but then a runtime exception is thrown:
Caused by: oracle.adf.controller.activity.ActivityLogicException: ADFC-00006: Existing transaction is required when calling task flow '/WEB-INF/adfc-config-EmployeesLookupn.xml#EmployeesLookupnTaskFlow'.
at oracle.adfinternal.controller.activity.TaskFlowCallActivityLogic.validateModel(TaskFlowCallActivityLogic.java:908)
Also the "share data controls with calling task flow" option for the individual Lov is always checked by default. How can i change the data scope setting at the application level?
I can send you a small test case i created to see for yourself.
Thanks

Simple networking of a G3[9.2] and G4[OS X]

Hi,
I 'presume' it is possible to network between 9.2 and OS X... using a G3 and a G4 respectively. There is also a scanner and printer which would be used by both. Please explain by word [or if someone has a link] how to do this...Thanks in advance,
'Network novices in need'
iMac G5 Mac OS X (10.3.8)

yes it is possible in OSX you would use File sharing as instructed below:
I. Prepare to Share
Connect computers to each other or to Internet
To share between computers that are at the same location, connect them to an Ethernet network or an AirPort network. For more information, see technical document 106658: "Creating a Small Ethernet Network"
You may also share over the Internet. A single computer using any kind of modem to connect to the Internet can share files, but the "Connecting between remote networks" section below applies.
Computers need IP addresses
If you can connect to the Internet, then your computer already has an IP address that is valid for your network. But if your computer does not have a valid IP address, which you can check in the Network pane of System Preferences, see technical document 106659: "Mac OS: How to Get an IP Address for Connecting to the Internet"
Connecting to the Internet and a local network (or LAN) at the same time
In most cases, users of institutional networks and home broadband will be advised to have their networks set up in a way that makes this goal effortless. Home users who don't have some type of routing device should see How to Connect to the Internet and Share Files Locally at the Same Time.
File Sharing with other Apple operating systems
This article concentrates only on File Sharing for Mac OS X. When properly set up, various Apple operating systems (such as Mac OS X, Mac OS 9, and AppleShare IP) can connect with each other. Be aware that the sharing service has other names, such as AppleShare and Apple File Protocol (AFP). When you connect to any of them, their behavior is superficially the same. If you use AppleTalk, review the AppleTalk issues section below.
Sharing with non-Apple operating systems
This article describes the most simple form of sharing available to Macintosh users (AppleShare). Other methods are available for communicating with other operating systems. See technical documents:
106660: "Mac OS X: Sharing With Non-Apple Operating Systems"
19652: "Macintosh: Networking With a Windows PC"
Connecting between remote networks
Mac OS X can share over the Internet (TCP/IP), as can Mac OS 9 and AppleShare IP. This allows Macintosh computers in remote locations to share files with any type of Internet connection. For more information, see technical document 106661: "Mac OS: Sharing Between Remote Networks, Sharing Over the Internet"
All Public folders are shared. Only Public folders are shared.
See technical document 106662: "Mac OS X: Only Public Folders Are Shared"
File Sharing is for up to 10 users
Up to 10 users may connect to File Sharing simultaneously. If you need to connect more users at once, you should upgrade to Unlimited-Client version of Mac OS X Server (http://www.apple.com/server/).
II. Start Sharing
1. Place files to share in your Public folder.
2. Choose System Preferences from the Apple menu. See Note 1.
3. Click the Network icon.
4. Choose the port you are going to share on (Built-in Ethernet or AirPort) from the Show pop-up menu. See Note 2.
5. Click the AppleTalk tab.
6. Click the checkbox to select Make AppleTalk Active.
7. Click Apply Now.
8. Click the Show All button in the upper left corner of the window.
9. Click the Sharing icon.
10. In the Computer Name field, type the name you wish to appear on the network for your computer. See Note 3.
11. Click Start in the File Sharing section. For Mac OS X 10.2 and later, select Personal File Sharing.
Repeat this process on any other Mac OS X computer that you wish to receive File Sharing connections.
Notes:
1. Users sharing between remote locations skip steps 3 to 8. Users of dial-up must connect before step 11.
2. Prior to Mac OS X 10.1, the Show menu was named "Configure."
3. If you change your Computer Name in the future, you must stop and restart File Sharing for the name change to take effect.
Managing privileges for shared data
Optionally, you can change the access privileges for items in your Public folder.
To change privileges for your entire Public folder:
1. Select your Public folder in a Finder window.
2. Choose Get Info (or Show Info) from the File menu.
3. Set the Show pop-up menu to Privileges.
4. You may now adjust user access privileges for the folder.
You can use the same steps for items in the Public folder.
III. Connect to a Sharing computer
How you connect to a Mac OS X computer that is sharing depends on two major factors:
the version of Mac OS on the connecting, or "client," computer
whether the client is local (on the same network) or remote
The steps you need to follow are found in technical document 107369, "Mac OS: How to Connect to File Sharing or Apple File Services (AFP)".
IV. Troubleshooting
AppleTalk issues
Mac OS 8, Mac OS 9, and Mac OS X 10.1 to 10.3.9 support file sharing (AFP) connections over AppleTalk. However, Mac OS X versions 10.0 to 10.0.4 (more) and 10.4 and later (more) can only connect to AppleShare over TCP/IP.
If you want to connect from versions 10.1 to 10.3.9 to Mac OS 8 sharing (which is AppleTalk only), be sure to enable AppleTalk as described in steps 5 and 6 in Section II, above. Mac OS 9 and Mac OS X can both connect over TCP/IP without AppleTalk, so this step is optional in the absence of Mac OS 8.
Mac OS X 10.4 and later don't support Personal File Sharing (or other AFP) over Appletalk, though by initiating the connection from the opposite direction you could still achieve an IP connection from a Mac OS 8 computer to a sharing Mac OS X computer. The Network preference pane in Mac OS X 10.4 and later still offers the AppleTalk checkbox, but it is for browsing AppleTalk-advertised resources and zones. The subsequent connection must be over TCP/IP.
General troubleshooting steps:
1. First, be sure you have followed the steps in this article correctly and reviewed the topics in Section I.
2. Choose System Preferences from the Apple menu.
3. Click Network.
4. Choose the network interface you are using from the Configure pop-up menu.
5. Click the TCP/IP tab.
6. Check to be sure that your computer has an IP address that is valid for your network. If your Configure menu is set to Manually, you also need to ensure that the Router and Subnet Mask entries are correct for your network. If you are not sure, check with the network administrator or Internet service provider.
7. Double check your physical connection: a phone line, Ethernet cable, or AirPort card and antenna. Be sure that what you are using is properly connected. Try swapping cables, or check to see that your AirPort card is properly seated. You can search the Knowledge Base for "AirPort and install." Select the document that matches your computer.
8. For the most reliable AppleTalk connections, Spanning Tree protocol should not be used on the network. See technical document 30922: "Spanning Tree Protocol: AppleTalk Issues".
Note: Wireless Internet access requires an AirPort Card, AirPort Base Station, and an Internet service provider, for which fees may apply. Some ISPs are not compatible with AirPort. America Online (AOL) works with AirPort software version 2.0 or later. For more information on AOL compatibility, see technical document 106591: "AirPort: How to Use with AOL". Range may vary with site conditions.
Now heres what you do on the OS 9 End
Computers must be physically connected
Connect the computers to either an AirPort or Ethernet network. For more information, see technical document 106658: "Macintosh: How to Create a Small Ethernet Network"
Start File Sharing
1. Choose Control Panels from the Apple menu, then File Sharing from the submenu.
2. Click the Start/Stop tab, then click Start.
3. If you want to allow connections over TCP/IP, click the checkbox to enable the "Enable File Sharing clients to connect over TCP/IP" option. For more information on this feature, see technical document 106661: "Mac OS: Sharing Over the Internet, or Between Remote Networks"
4. Enter an Owner Name, Owner Password, and Computer Name in the corresponding fields. You may have already entered this information using the Mac OS Setup Assistant.
At this point, File Sharing is active but only the owner can connect. There is no guest access.
This technical document describes how to start File Sharing.
Note: This document is based on Mac OS 9. You may encounter slight variations when using Mac OS versions 8.0 through 8.6, but the steps are basically the same. You may find steps specific to your Mac OS version by choosing Mac Help from the Help menu. For more information on File Sharing in Mac OS X, see technical document 106461: "Mac OS X: File Sharing"
Warning: Be careful when allowing others to connect to your computer and when setting privileges. Giving access to an untrusted party could compromise your security or data. For more information, see technical document 60621: "Mac OS: File Sharing Security"
Computers must be physically connected
Connect the computers to either an AirPort or Ethernet network. For more information, see technical document 106658: "Macintosh: How to Create a Small Ethernet Network"
Start File Sharing
1. Choose Control Panels from the Apple menu, then File Sharing from the submenu.
2. Click the Start/Stop tab, then click Start.
3. If you want to allow connections over TCP/IP, click the checkbox to enable the "Enable File Sharing clients to connect over TCP/IP" option. For more information on this feature, see technical document 106661: "Mac OS: Sharing Over the Internet, or Between Remote Networks"
4. Enter an Owner Name, Owner Password, and Computer Name in the corresponding fields. You may have already entered this information using the Mac OS Setup Assistant.
At this point, File Sharing is active but only the owner can connect. There is no guest access.
Decide who can connect
If you want others to connect, click the Users & Groups tab in the File Sharing control panel.
For guest access:
1. Select the user named Guest.
2. Click Open.
3. Choose Sharing from the Show menu.
4. Click to select the checkbox for "Allow guests to connect to this computer."
Warning: When you enable guest access, everyone can connect to the items you choose to share. They will have the privileges that you set for "Everyone."
For a new user:
1. Click New User.
2. Give the user a name and password.
Once you have created users, you may put them into groups if you so desire. This allows you more control in setting privileges.
For a new group:
1. Click New Group .
2. Give the new group a name.
3. Drag the desired users into the new group's window.
Connect to a Sharing computer
Note: Computers connecting between remote locations on the Internet cannot browse by Computer Name. The steps below cover both remote and local connections.
From a Mac OS 8 or Mac OS 9 computer
1. Choose the Chooser from the Apple menu.
2. Click the AppleShare icon. If you are connecting to a computer on your local network, continue to Step 3. If you are connecting to a computer on a remote network (or "over the Internet"), then skip to Step 7. If you are not sure, see Note 1 at the end of this section.
3. If AppleTalk Zones appear on your network, choose the desired zone. If not, disregard this step.
4. Select the computer name from the computer list.
5. Click OK.
6. Stop here. Do not continue to Step 7.
7. Click the Server IP Address button.
8. Type either the IP address or the DNS name of the computer to which you wish to connect. See Note 2.
9. Click Connect.
After a successful connection, an icon for the shared disk appears on your desktop.
This is all out of Mac help and The Apple Support Documents. Hope it helps. You can find this by searching for Networking in Mac help and OS 9 help in Apple's Support Doc's
-Internet Wiz

My computer recognizes my player but the firmware download wont (micropho

its a zen microphoto and i erased the firmware accidentaly (Do'h) and now the firmware download says my player is not connected
p.s. zen microphoto media explorer wont recognize it ethier
Message Edited by dkajake on 09-29-2006 08:03 PM

Try this:
Go into another PC (IF POSSIBLE)
Then install the Zen software that came in your installation CD.
Plug in Zen and download new firmware.
The PC should recognize it and you will be able to get it into the player.
After that you can go back to the other PC and see if it works out (it should).
This worked for my micro a year ago.
Otherwise, contact costumer support. Good luck!!

XFi Fatality pro series and front panel sound -lack of- so la

Had to chip in on this forum as I'm quite furious with Creative -and I know I'm not the only one, and since CL's people read this board, then could you please take notice of your custormers? After all, aren't we the ones thanks to whom there is still a CL? Therefore could you please stop insulting our intelligence and regard us as milking cows as well?
When you've spent quite a lot of money on a *high end* card like a X-Fi Xtreme gamer Fatality, who in on earth would be willing and happy to have to fork out for a front panel costing nearly half the price of the card just for the privilege of being able to connect your case front panel headphone and mic to the sound card?! Do I expect the connection from the card to front case audio to come as standard? YES. Do I take it kindly to see a proprietary connection preventing me to do that unless I buy another expensi've toy from CL, or do I want to have to mod a cable or buy a modded one to that effect? NO! CL has voiced concerns that people making/using modded cables could result in damage/fry the card, well who's fault is that if not Creative's? How about doing the decent thing and provide the cable WITH the card in the first place, and even more decent, why not provide these cards' owners with one? Can't be the case of not having such cables since CL is making the proprietary connector for their front panel in the first place. If insisting no such cables are available, then make them!
Meanwhile cards' owners are left with little alternati've if they cannot have their onboard sound (to connect to the case audio) and their CL card coexist without conflict. This is lame at best, arrogant at worse and the same approach as with the cards' drivers -will not go there as there are enough threads about that but for the record, if it wasn't for a certain someone's functional drivers, how many cards would still be in use? I guess it could be said I was stupid enough to get this card, should have known better and go for another make which would not be giving me such grief! I emphasize again, these cards aren't cheap to buy so Creative, I am NOT interested in the forthcoming X-Fi2 series, just provide the present ones with full functionality and the means to at least connect to our case audio without any more expense on our part.

Thanks for that, Cornholio_OH! I've already looked into PC Performance's adapter and indeed noticed that those using it said PCP are wiring it wrong. So I got in touch with PCP about it and they deny the wrong wiring, stating that there's no mistake in how the cable is made but only how cases front ports are wired and grounded (?!). Also, they only provide the adapter for AC97 and not HD audio and some people had trouble with the AC97 connection, though I suppose that's better than nothing
Though you are right that it's an alternati've that may be worth the money, personally I strongly bulk at having to get one of those, especially when adding shipping costs to Europe, it no longer will be worth the money! When nowadays there are cards that do perform as well if not surpassing CL's and who provide the adequate connection and at no extra cost, I am strongly inclined to getting rid of the Fatality -practically brand new one by the way- and go for another make. Call it stubbornness or principle, if us consumers just roll over and give in having to either buy more accessories or modded cables, we're sending the wrong signal to CL and everyone else that it's okay to take us for stupid and milk us.

Automatic Resizing of panel with drawings added to a scrollPane

I have a Panel with rectangles text and arcs drawn .and it is added to a scrollPane.both vertical and Horizontal scrollbars are enabled for scrollPane.My problem is that i have to draw arcs connecting these rectangles with text enclosed in it. and when i connect two rectangles a span is formed connecting the two..and as hierarchy goes deeper ie connecting spans of already linked rectangles with similar spans..There wont be enough space at top for arc to be drawn..So ive to either readjust all objects related with drawings in panel or is there any other way to increase panel size automatically as drawings need more space..Please suggest me some method for this problem

Panels Preffered size is set as (3000,1000) and TextRectangles are drawn in panel Cordinates of textRectangle are set in setTextRectangle method and all further drawings connecting rectangle are done by mouse clicks on specific rectangles.
and layout in setTextRectangle is TextLayout of the text enclosed in rectangles.So when i coordinates for arc drawn exceeds the panel should i call separate method for resetting panel size is that what you have suggested
 screen_Resolution = Toolkit.getDefaultToolkit().
 getScreenResolution();
 screen_Width = Toolkit.getDefaultToolkit().
 getScreenSize().width;
 screen_Height = Toolkit.getDefaultToolkit().
 getScreenSize().height;
public void setTextRectangle(Graphics g, Font font)
 Graphics2D g2 = (Graphics2D) g;
 FontMetrics metrics= g.getFontMetrics (font);
 int textHeight = metrics.getHeight();
 int left=textHeight;
 int yCordRectangle=(int)(screen_Height/5);
 for (int i = 0; i < layouts.size (); i++) {
 int top=(int)(screen_Resolution*2);
 for (int j = 0; j < layouts.get (i).size (); j++) {
 top += textHeight;
 TextRectangle textRectangle=new TextRectangle(left,yCordRectangle,wrapWidth,top-150);
 addtoarray( textRectangle, rectangles);
 left += wrapWidth + textHeight;

ORA-22990 ( Cannot span lob... ) while using connection pooling...

Hi all, I am maintaining a web site that has lots of requests ( about 10 requests a second ) to an Oracle table that has a BLOB field. Those requests create new blobs, updates them and reads them... My program worked fine until I started using connection pooling ( Before that, I used a single connection that was initialized at startup ). Although I had to synchronized the methods that interact with blob field, everything worked great. So now, to optimize my site, I want to use connection pooling so that even if my methods are synchonized on the connection object, there will be more than one connection available so it will not affect performance.
So once I introduced my connection pooling system with the oracle.jdbc.pool.OracleConnectionCacheImpl class, I started getting ORA-22990 ( Cannot span lob objects... ). I get the error on the flush() method when I try to write the blob to the database. Here is my function that writes a row in the databse.
private synchronized void writeSession(CapSession pSession) throws Exception
        javax.sql.PooledConnection pc = pool.getPooledConnection();
        Connection conn = pc.getConnection();
        CallableStatement stmt=conn.prepareCall(writeObjSQL);
        stmt.setString(1,pSession.getSessionId()+pSession.getPassword());
        stmt.setLong(2,pSession.getLastAccess());
        stmt.setLong(3,pSession.getTimeout());
        stmt.registerOutParameter(4,java.sql.Types.BLOB);
        stmt.executeUpdate();
        oracle.sql.BLOB blob=(BLOB)stmt.getBlob(4);
        OutputStream os=blob.getBinaryOutputStream();
        ObjectOutputStream oop=new ObjectOutputStream(os);
        oop.writeObject(pSession);
        oop.flush();
        oop.close();
        os.close();
        stmt.close();
        conn.commit();
        conn.close();
        pc.close();
} If anyone could help me, I would deeply appreciate it!
Thank you for your time.

kalle
Thank you very much for your advice!!!
Like you said, I started to check whether the connections are fine before giving them from the pool.I am executing a simple "select 'anil' from dual" and if its fine only then I return the connection. So far it seems to be fine. Also I am reopening the connections(closing the old ones and opening new connections) after every 12 hours.
As far as the JDBC driver is concerned, I already tried with Oracle 8i driver, it gave the same problems. I read that 9i driver might solve this problem, so I changed to the latest 9i driver (classes12_g.zip).
Sometimes before(before I started checking whether the connection is good )the application used to hang up at the point where I am issuing setAutoCommit(false).It never comes out from that statement.Is this something to do with theconnections being closed?
What I am afraid is, will the appilation get hung up even after I check the connection with select query and then issue autocommit(false)??
Or will it hang up while I check with a select query??
As long as it doesn't hung up, I am fine. Because i am cathching the exceptions.
Thanks In ADVANCE
Anil

Challenge: Spanning Tree Control Between 2 links from Switch DELL M6220 to 2 links towards 2 switches CISCO 3750 connected with an stack (behavior like one switch for redundancy)

Hello,
I have an Spanning tree problem when i conect 2 links from Switch DELL M6220 (there are blades to virtual machines too) to 2 links towards 2 switches CISCO 3750 connected with an stack (behavior like one switch for redundancy, with one IP of management)
In dell virtual machine is Spanning tree rapid stp, and in 3750 is Spanning tree mode pvst, cisco says that this is not important, only is longer time to create the tree.
I dont know but do you like this solutions i want to try on sunday?:
Could Spanning tree needs to work to send one native vlan to negociate the bdpus? switchport trunk native vlan 250
Is it better to put spanning-tree guard root in both 3750 in the ports to mitigate DELL to be root in Spanning Tree?
Is it better to put spanning- tree port-priority in the ports of Swicht Dell?
¿could you help me to control the root? ¿Do you think its better another solution? thanks!
CONFIG WITH PROBLEM
======================
3750: (the 2 ports are of 2 switches 3750s conected with a stack cable, in a show run you can see this)
interface GigabitEthernet2/0/28
description VIRTUAL SNMP2
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 4,13,88,250
switchport mode trunk
switchport nonegotiate
logging event trunk-status
shutdown
interface GigabitEthernet1/0/43
description VIRTUAL SNMP1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 4,13,88,250
switchport mode trunk
switchport nonegotiate
shutdown
DELL M6220: (its only one swith)
interface Gi3/0/19
switchport mode trunk
switchport trunk allowed vlan 4,13,88,250
exit
interface Gi4/0/19
switchport mode trunk
switchport trunk allowed vlan 4,13,88,250
exit

F.Y.I for catylyst heroes - here is the equivalent config for SG-300 - Vlan1 is required on the allowed list on the catylyst side (3xxx/4xxx/6xxx)
In this example:
VLANS - Voice on 188, data on 57, management on 56.
conf t
hostname XXX-VOICE-SWXX
no passwords complexity enable
username xxxx priv 15 password XXXXX
enable password xxxxxx
ip ssh server
ip telnet server
crypto key generate rsa
macro auto disabled
voice vlan state auto-enabled !(otherwise one switch controls your voice vlan….)
vlan 56,57,188
voice vlan id 188
int vlan 56
ip address 10.230.56.12 255.255.255.0
int vlan1
no ip add dhcp
ip default-gateway 10.230.56.1
interface range GE1 - 2
switchport mode trunk
channel-group 1 mode auto
int range fa1 - 24
switchport mode trunk
switchport trunk allowed vlan add 188
switchport trunk native vlan 57
qos advanced
qos advanced ports-trusted
exit
int Po1
switchport trunk allowed vlan add 56,57,188
switchport trunk native vlan 1
do sh interfaces switchport po1
!CATYLYST SIDE
!Must Explicitly allow VLan1, this is not normal for catalysts - or spanning tree will not work ! Even though it’s the native vlan on both sides.
interface Port-channel1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,56,57,189
switchport mode trunk

Connecting external monitor--not screen span

Lots of people ask about screen spanning and I see a clear answer there...but I am just trying to a find an inexpensive way to monitor my FCP editing projects on a cheap field monitor (or more likely an old television) for color correction purposes. I do own the apple vga adapter but thats it at this point--what should i do next? thanks

If you have an imac G5, you can color correct it for Pro color matching (NOT the 17, just the 20).
Forget the iMac vid. adapter. The VGA output on the iMac is below VESA standards (intentional? I don't know... but the Powermac/Powerbook is good!). If you're using a Trinitron like I am (or plan to) for external color work, the iMac will possibly offer you dim video like the Mac Mini.

HP Wireless Printers cannot connect to WPA2-secured WiFi networks with Cisco/Meraki WAPs

In the last two months, I've had the displeasure of working with two very different HP printers and attempting to make them work on a WPA2-secured wireless network. All attempts to authenticate fail with "invalid phassphrase".
I'm not the first person to encounter this, it's a problem with many different HP wireless printers (I just happen to have physical access to the OfficeJet Pro 8610 & Deskjet 3511).
My equipment is a Cisco ASA 5505 Firewall running ASA 9.1x & Cisco Aironet 1142 running IOS 15.3.x.
What does work on the WPA2/AES SSID: Apple MacBook Air running OSX 10.10.2, Three Windows-Based laptops running Windows 8.1 Update 1, an iPhone 5s, Three Windows Phone 8.1 devices, Roku 2, PlayStation 4, PlayStation 3, Sharp Aquos TV, Amazon Streaming Stick, and an Android Tablet (Jellybean). Basically, everything.
What does not work on the WPA2 network: OfficeJet Pro 8610 & Deskjet 3511.
To test the theory there is a problem with HP's implementation of WPA2 with regard to Cisco Aironet IOS, I built out a second SSID that only works in WPA/TKIP mode. This solution works. Both HP printers will join the WPA/TKIP network.
So, I'm able to demonstrate there is a certain connectivity issue. When i look at AAA Debug on the WAP's console, I can observe the HPs attempt to authenticate "Bind I/F" on the WPA2 SSID, however they do not achieve authentication and do not pass the AAA phase. However, on the WPA SSID, they bind and authenticate successfully.
To help illustrate this, here is my WAP running config. It's about as simple as it can get. There is no relevant MAC filtering or ACLs bound to any interface. Noting that I have an ACL on remote access to the WAP (i.e. Locked down to SSH, disabling telnet). The main point being that the ASA firewall is not a factor in this problem as the issue is at the WAP before WPA2 authentication can complete, therefore the printers never reach the network / when the printers connect to the WPA network, the operate fully & correctly.
If anyone at HP can indicate why this particular config is somehow improper or broken, that would be fantastic. There should be no reason why Cisco / Meraki WAP owners have to lower wireless encryption standards just for a printer, be forced into wired, create separate SSIDs with lower encryption specifically for a device.
Building configuration...
Current configuration : 6064 bytes
! Last configuration change at 12:46:47 UTC Fri Aug 20 1993 by admin
version 15.3
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
hostname 10-10-50-1
logging buffered 1024768
logging rate-limit console 9
aaa new-model
aaa authentication login default local
aaa authorization exec default local
aaa session-id common
no ip source-route
no ip cef
ip domain name freedom.local
dot11 syslog
dot11 vlan-name inside vlan 50
dot11 vlan-name inside-wpa-only vlan 70
dot11 ssid inside
   vlan 50
   band-select
   authentication open
   authentication key-management wpa version 2
   mbssid guest-mode
   wpa-psk ascii 7 xxxxxx
   information-element ssidl
dot11 ssid inside-wpa-only
   vlan 70
   band-select
   authentication open
   authentication key-management wpa
   mbssid guest-mode
   wpa-psk ascii 7 xxxxxx
   information-element ssidl
dot11 band-select parameters
   cycle-count 3
   cycle-threshold 200
   expire-supression 20
   expire-dual-band 60
   client-rssi 75
dot11 wpa handshake timeout 500
dot11 network-map
username ADMIN privilege 15 secret 5 xxxxxx
ip ssh version 2
bridge irb
interface Dot11Radio0
no ip address
no ip route-cache
encryption vlan 50 mode ciphers aes-ccm
encryption vlan 70 mode ciphers aes-ccm tkip
ssid inside
ssid inside-wpa-only
antenna gain 0
mbssid
speed basic-1.0 basic-2.0 basic-5.5 basic-11.0 6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
channel 2412
station-role root
l2-filter bridge-group-acl
interface Dot11Radio0.50
encapsulation dot1Q 50 native
no ip route-cache
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 spanning-disabled
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
interface Dot11Radio0.70
encapsulation dot1Q 70
no ip route-cache
bridge-group 70
bridge-group 70 subscriber-loop-control
bridge-group 70 input-address-list 700
bridge-group 70 output-address-list 700
bridge-group 70 spanning-disabled
bridge-group 70 block-unknown-source
no bridge-group 70 source-learning
no bridge-group 70 unicast-flooding
interface GigabitEthernet0
no ip address
no ip route-cache
duplex auto
speed auto
interface GigabitEthernet0.50
encapsulation dot1Q 50 native
no ip route-cache
bridge-group 1
bridge-group 1 spanning-disabled
no bridge-group 1 source-learning
interface GigabitEthernet0.70
encapsulation dot1Q 70
no ip route-cache
bridge-group 70
bridge-group 70 spanning-disabled
no bridge-group 70 source-learning
interface BVI1
mac-address xxxx.xxxx.xxxx
ip address 10.10.50.1 255.255.255.0
no ip route-cache
ip forward-protocol nd
ip http server
ip http authentication aaa
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
ip route 0.0.0.0 0.0.0.0 10.10.50.2
logging history size 100
access-list 111 permit tcp any any neq telnet
bridge 1 route ip
line con 0
access-class 111 in
line vty 0 4
access-class 111 in
length 0
transport input ssh
line vty 5 15
access-class 111 in
transport input ssh
end

I get the same behavior with a laserjet m451nw. I need to enable tkip to get the printer working, it doesn't support pure aes-ccm (every other device here supports pure aes-ccm, even cheap ones), although it's advertised as working.
The following snippet of config works, but I still think it should work without the tkip "hack".
dot11 ssid whatever
vlan 1
band-select
authentication open
authentication key-management wpa version 2
interface Dot11Radio0
encryption vlan 1 mode ciphers aes-ccm tkip

Connection is closed?

Hi, i am using tomcat 4.1.24 and MS Access 2000 to create a web application. I try to use datasource to make database connection. After start the tomcat, i run my application. First i login to the application and then go to create user. However, fail to create user due to CONNECTION IS CLOSED (error message from SQLException).
Questions:
1)Why the connection is closed just after the logging is successful?
2)Time out problem? How to configure the timeout of connection?
Thanks.

I'm sorry not having used tomcat I can not give you any more suggestions. When I searched (using the advanced search against the forums) I did see several answers dealing with tomcat timeout. I still do not think it is a timeout problem. I could be wrong but any connections including TCP connections, I have dealt with do not timeout in the time span you have.
Try using the advanced search and see if any of the answers point the way.
rykk

Lan connectivity Issue on autonomous AP with throttles

          Hello,
I encounter a strange problem on several AP 1242 in version 12.4(25d)JA1 of a customer :
He has 10 autonomous AP covering a factory and is using them for laptop connectivity and TOIP with mainly 7921 Cisco Wifi Phones.
The phones are configured to use only 802.11a.
The APs loose LAN connectivity randomly and therefore the clients don't work anymore.
The AP are connected on a 2960 and a 3560 wich are in turn connected on a 3750 wich route the trafic.
After checking spanning-tree no loops are present.
When I check the counters on the AP involved I see the "trhottles" and "ignored" counters incrementing on the fa0 link of the AP impacted wich mean I think it can't handle the incoming traffic. This incoming traffic seems not to be too big however. I can see drops on the switch interface connecting the AP.
There is a lot of roaming on the AP due to people walking in the factory with their wifi phones.
Here is a view of the fa0 counters :
AP1242-LOGIST#sh int fa0
FastEthernet0 is up, line protocol is up
Hardware is PowerPCElvis Ethernet, address is 001d.a1ce.26e2 (bia 001d.a1ce.26e2)
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Full-duplex, 100Mb/s, MII
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/160/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 81000 bits/sec, 53 packets/sec
5 minute output rate 29000 bits/sec, 26 packets/sec
     7447113 packets input, 674891974 bytes
     Received 286839 broadcasts, 0 runts, 0 giants, 549631 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 549631 ignored
     0 watchdog
     0 input packets with dribble condition detected
     4422100 packets output, 609868806 bytes, 0 underruns
     0 output errors, 0 collisions, 4 interface resets
     1 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
Here is a small part of logs concerning roaming, i don't see errors or log indicating that something is wrong nor in the switches log :
Jun 6 12:57:27.007: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP001E4A3EE15D 001e.4a3e.e15d Associated KEY_MGMT[WPAv2 PSK]
Jun 6 12:57:42.499: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP588D09D3A92B 588d.09d3.a92b Reassociated KEY_MGMT[WPAv2 PSK]
Jun 6 12:58:02.620: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 588d.09d3.a92b Reason: Sending station has left the BSS
Jun 6 12:58:03.653: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP588D09D3A92B 588d.09d3.a92b Reassociated KEY_MGMT[WPAv2 PSK]
Jun 6 12:59:15.564: %DOT11-6-ROAMED: Station 588d.09d3.a92b Roamed to 001e.134c.5a50
Jun 6 12:59:15.564: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 588d.09d3.a92b Reason: Sending station has left the BSS
Jun 6 12:59:41.905: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 442b.0355.ab28 Reason: Previous authentication no longer valid
Jun 6 12:59:54.728: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP442B0355AB28 442b.0355.ab28 Associated KEY_MGMT[WPAv2 PSK]
Jun 6 13:01:12.541: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP588D09D3A92B 588d.09d3.a92b Reassociated KEY_MGMT[WPAv2 PSK]
Jun 6 13:02:35.841: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 001e.4a3e.d875 Reason: Previous authentication no longer valid
Jun 6 13:02:36.489: %DOT11-6-ASSOC: Interface Dot11Radio0, Station   ec85.2f7c.c837 Associated KEY_MGMT[WPAv2 PSK]
Jun 6 13:03:29.256: %DOT11-6-ROAMED: Station 588d.09d3.a92b Roamed to 001e.134c.5a50
Jun 6 13:03:29.256: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 588d.09d3.a92b Reason: Sending station has left the BSS
Jun 6 13:04:32.754: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP001E4A3ED875 001e.4a3e.d875 Associated KEY_MGMT[WPAv2 PSK]
Jun 6 13:06:47.858: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 001e.4a3e.e15d Reason: Previous authentication no longer valid
Jun 6 13:07:18.107: %DOT11-6-ROAMED: Station 001f.6c7a.5101 Roamed to 001d.a2bb.15b0
Jun 6 13:07:18.107: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 001f.6c7a.5101 Reason: Sending station has left the BSS
Jun 6 13:07:38.109: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP588D09D3A92B 588d.09d3.a92b Reassociated KEY_MGMT[WPAv2 PSK]
Jun 6 13:07:42.031: %DOT11-6-ROAMED: Station 588d.09d3.a92b Roamed to 001e.134c.5a50
Jun 6 13:07:42.031: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 588d.09d3.a92b Reason: Sending station has left the BSS
Jun 6 13:07:46.489: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP001F6C7A5101 001f.6c7a.5101 Reassociated KEY_MGMT[WPAv2 PSK]
Jun 6 13:08:27.712: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP588D09D3A92B 588d.09d3.a92b Reassociated KEY_MGMT[WPAv2 PSK]
Jun 6 13:08:44.502: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 588d.09d3.a92b Reason: Sending station has left the BSS
Jun 6 13:08:44.572: %DOT11-6-ASSOC: Interface Dot11Radio1, Station SEP588D09D3A92B 588d.09d3.a92b Associated KEY_MGMT[WPAv2 PSK]
Jun 6 13:08:56.778: %DOT11-6-ROAMED: Station 588d.09d3.a92b Roamed to 001e.134c.5a50
Jun 6 13:08:56.779: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 588d.09d3.a92b Reason: Sending station has left the BSS
Jun 6 13:09:17.874: %DOT11-6-ROAMED: Station 001f.6c7a.5101 Roamed to 003a.9a92.8d70
Jun 6 13:09:17.874: %DOT11-6-DISASSOC: Interface Dot11Radio1, Deauthenticating Station 001f.6c7a.5101 Reason: Sending station has left the BSS
The AP are configured as follow :
Current configuration : 5184 bytes
! No configuration change since last restart
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
hostname AP1242-LOGIST
logging rate-limit console 9
aaa new-model
aaa authentication login default local
aaa authorization exec default local
aaa session-id common
clock timezone gmt+1 1
clock summer-time gmt recurring last Sun Mar 2:00 last Sun Oct 3:00
dot11 syslog
dot11 vlan-name Data vlan 11
dot11 vlan-name Voix vlan 14
dot11 vlan-name Webguest vlan 5
dot11 ssid WLAN_data
   vlan 11
   authentication open
   authentication key-management wpa
   mbssid guest-mode
   wpa-psk ascii 7 10600C0E261B173C252203797479633F371A29
dot11 ssid WLAN_voice
   vlan 14
   authentication open
   authentication key-management wpa
   mbssid guest-mode
   wpa-psk ascii 7 080F49592A1500203B2D25567A7A7622263C0C
dot11 ssid Webguest
   vlan 5
   authentication open
   mbssid guest-mode
dot11 wpa handshake timeout 1000
dot11 arp-cache
dot11 priority-map avvid
dot11 phone
power inline negotiation prestandard source
class-map match-all _class_voice0
match ip dscp ef
class-map match-all _class_voice1
match ip dscp cs3
policy-map voice
class _class_voice0
set cos 6
class _class_voice1
set cos 3
bridge irb
interface Dot11Radio0
no ip address
no ip route-cache
encryption vlan 11 mode ciphers aes-ccm
encryption vlan 14 mode ciphers aes-ccm
ssid WLAN_data
ssid WLAN_voice
ssid Webguest
mbssid
power client 17
channel 2472
station-role root
dot11 qos class voice local
    admission-control
    admit-traffic narrowband max-channel 75 roam-channel 6
dot11 qos class voice cell
    admission-control
no cdp enable
infrastructure-client
interface Dot11Radio0.5
encapsulation dot1Q 5
no ip route-cache
no cdp enable
bridge-group 5
bridge-group 5 subscriber-loop-control
bridge-group 5 block-unknown-source
no bridge-group 5 source-learning
no bridge-group 5 unicast-flooding
bridge-group 5 spanning-disabled
interface Dot11Radio0.11
encapsulation dot1Q 11
no ip route-cache
no cdp enable
bridge-group 11
bridge-group 11 subscriber-loop-control
bridge-group 11 block-unknown-source
no bridge-group 11 source-learning
no bridge-group 11 unicast-flooding
bridge-group 11 spanning-disabled
interface Dot11Radio0.14
encapsulation dot1Q 14
no ip route-cache
no cdp enable
bridge-group 14
bridge-group 14 subscriber-loop-control
bridge-group 14 block-unknown-source
no bridge-group 14 source-learning
no bridge-group 14 unicast-flooding
bridge-group 14 spanning-disabled
interface Dot11Radio1
no ip address
no ip route-cache
encryption vlan 11 mode ciphers aes-ccm
encryption vlan 14 mode ciphers aes-ccm
ssid WLAN_data
ssid WLAN_voice
ssid Webguest
no dfs band block
mbssid
channel dfs
station-role root
interface Dot11Radio1.5
encapsulation dot1Q 5
no ip route-cache
no cdp enable
bridge-group 5
bridge-group 5 subscriber-loop-control
bridge-group 5 block-unknown-source
no bridge-group 5 source-learning
no bridge-group 5 unicast-flooding
bridge-group 5 spanning-disabled
interface Dot11Radio1.11
encapsulation dot1Q 11
no ip route-cache
no cdp enable
bridge-group 11
bridge-group 11 subscriber-loop-control
bridge-group 11 block-unknown-source
no bridge-group 11 source-learning
no bridge-group 11 unicast-flooding
bridge-group 11 spanning-disabled
interface Dot11Radio1.14
encapsulation dot1Q 14
no ip route-cache
no cdp enable
bridge-group 14
bridge-group 14 subscriber-loop-control
bridge-group 14 block-unknown-source
no bridge-group 14 source-learning
no bridge-group 14 unicast-flooding
bridge-group 14 spanning-disabled
interface FastEthernet0
no ip address
no ip route-cache
speed 100
full-duplex
no cdp enable
hold-queue 160 in
interface FastEthernet0.1
encapsulation dot1Q 1 native
no ip route-cache
no cdp enable
bridge-group 1
no bridge-group 1 source-learning
bridge-group 1 spanning-disabled
interface FastEthernet0.5
encapsulation dot1Q 5
no ip route-cache
no cdp enable
bridge-group 5
no bridge-group 5 source-learning
bridge-group 5 spanning-disabled
interface FastEthernet0.11
encapsulation dot1Q 11
no ip route-cache
no cdp enable
bridge-group 11
no bridge-group 11 source-learning
bridge-group 11 spanning-disabled
interface FastEthernet0.14
encapsulation dot1Q 14
no ip route-cache
no cdp enable
bridge-group 14
no bridge-group 14 source-learning
bridge-group 14 spanning-disabled
service-policy input voice
service-policy output voice
interface BVI1
ip address 10.17.10.5 255.255.255.0
no ip route-cache
ip default-gateway 10.17.10.254
ip http server
ip http authentication aaa
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
logging trap warnings
logging 10.15.51.115
no cdp run
bridge 1 route ip
line con 0
line vty 0 4
sntp server 10.15.1.50
sntp broadcast client
end
Does someone ever experienced a similar problem ?
When I shut radio interfaces they're is no more problems on the LAN. Can this be an overlapping coverage issue ?
Can someone please give me advices on how to troubleshoot this issue ?
Thank you in advance as I'm a bit stuck.
Best Regards,

     Hi Scott,
Thanks for your reply.
Do you think this can be the origin of the issue my customer encounters or is it only to be standard ? As this change will have to be made on all clients, if there is a chance it solves the problem I will do it ASAP, if not I will delay it in a less busy period :-)
Can the constant roaming associations and dissasociations overload the AP and make it stop responding on the LAN or is it only a throuhput problem ?
Thanks in advance for your answer.
Best Regards,

Potential issues with this connection option

Hello guys,
I have a tape library that is located on campus but only connected to one FC switch. I have two redundant links to the switch and would like to load balance the load as much as possible. Does my layout look reasonable ? I hate connecting one switch to both Fabric A and Fabric B ..but that's all i have to work with. What's the worth that could happen ? Let's say 9134 melts down and loses its configuration ..fabric A and fabric B should not have issues because VSANs are unique on each fabric.

do you have separate FC port/HBA for the backup on host (dual channeled)? if so, you can keep your SAN traffic and backup traffic on different VSANs. Only backup VSAN would span across switches.i.e.
Fabric A - VSAN 10 for data, VSAN 11 for backup traffic
Fabric B - VSAN 20 for data, VSAN 21 for backup traffic
9134 will have only VSAN 11 and 21 configured. ISL between Fabric A and 9134 will allow only VSAN 11 and ISL between Fabric B and 9134 will allow only VSAN 21
Even otherwise, your approach seems best in the situation, to me. Just make sure that you configure ISLs and restrict VSANs across. Preferably layout your ports on 9134 such that fabric A and B do not get mixed up between ports groups (even though 9134 ports operate at line rate). This helps to logically keep things separate.

Is it possible to connect a 22" cinema display to an ibook g4?

Hi all!
So, I have the DVI to ADC adapter (with an attached usb cable), ADC to VGA adapter, and then the VGA to mini VGA that came with my computer. I have everything connected and I know the screen is getting power (I push the screen's power button and it lights up but then fades to nothing) , but the display screen shows nothing and my ibook gives no indication of the display screen being connected - even when I enter system preferences/displays and click "detect displays". Is it even possible to power a nice, big display screen from my lil' old ibook g4? Please oh please say it is! If not, is it worth it to have an enormous 2005 desktop tower repaired? Thanks everyone!

That's why iBook users install a firmware hack called screen spanning doctor as a workaround (supports OSX 10.4)
http://www.rutemoeller.com/mp/ibook/ibook_e.html

DB connection span

Similar Messages

Maybe you are looking for