ASIP dumps TCP stack nightly

We have been running ASIP 6.3 since 2001, migrating it through several servers. For the past 8 months, it has resided on an early-edition G4 (ID 106, ROM 7.5.1) with 1.5GB RAM and two ATA drives supporting a small school (100 user accounts, rarely > 30 logged on at once). The server provides only AFS services, using both TCP/IP and AppleTalk. The underlying system is OS 9.1.1 (we found it would not install on 9.2). Until 3 weeks ago we'd never had a real problem we hadn't caused ourselves.
For the last 3 weeks, every morning when we arrive at school the server is hung, requiring a hard restart. There is usually (but not always) an error message: "TCP stack was dumped." We tried turning off TCP/IP service from Server Manager, but that didn't change the problem. This ONLY happens overnight -- otherwise, all services run smoothly. The machine is on a UPS which tests OK, and is set to restart if it loses power.
We can't tell if this is an ASIP error or an OS 9.1.1 error. We've never seen this error before (between us we have over 2 decades of Appleshare server management experience behind us).
Ideas?

Look at this site for getting 9.2.2 and 6.3.3 up on your Server:
http://os9forever.com
Click the link on the left labeled ASIP patch. Print out and read the documents. I tried to install the patch, and could not quite get it to work, but in reading the discussion and examining the files in question, I realized a drag-and-drop install of the crucial parts was all that was needed. It worked fine.
One possibility on dumping the TCP/IP stack may be lurking in the TCP/IP Control Panel. If the "load only when needed" box is checked, when things get very quiet, it may just unload it.
I am not certain whether that parameter is one of the several AppleTalk/ TCP parameters stored in Parameter RAM, but a PRAM reset at a minimum, and replacing the battery at the extreme may be in order anyway.

Similar Messages

TCP stack and Frequent GC Calls

Hi All
I have a client/socket application which is giving me a tricky problem.
Suddenly i fing that load average of my machine increases without any chane in client/server activity.On log analysis i find frequent GC calls
390319.956: [GC 390319.956: [ParNew: 147583K->225K(172032K), 0.0019560 secs] 239475K->92116K(499712K), 0.0020500 secs]
390322.215: [GC 390322.215: [ParNew: 147681K->190K(172032K), 0.0018750 secs] 239572K->92083K(499712K), 0.0019590 secs]
Even when i get all most clients disconnected from my server,i still observer high load average and frequent.
I im confuesed how this can happen when there is not much activity on server??
Is is possible that TCP stack of VM is filled because of inability of few clients to read all responses??Can filling of TCP stack lead JVM getting amock resulting in contineous GC calls??
Also,what precautions should i take in client/server architecture that this is not repeated if TCP stack choking is the cause of this problem??
Is there any mechaninsm to monitor TCP stack of system??
Any kind of your advise will be helpful to me.
Please please some light on this issue
with regards
Kumar Vinit

I would think Java's TCP/IP support is a relatively shallow wrapper around the underlying OS provided one. It should not be an issue.

Corrupted TCP stacK?

Here's the problem.
I can upload and download email just fine. I have a DSL modem, no router, jsut the one iMac connected, and am using Sys 10.4
When I try to connect to a web page, I get an message that I am "not connected to the internet".
I can type in the numerical address of Google, for example, in the address line and I connect to Google just fine; type in "Google" and get the above message.
My ISP gave me a workaround of typing in the numerical addresses of their DNS servers in the network configuration screen (TCP/IP configuration). However with the DHCP connection I should not have to be providing these. In any case with these addresses entered in the "DNS servers" box, things work fine.
Their comment was that my TCP stack was probably corrupted. Not being familiar with Macs, the suggestion was that there are probably some preferences that should be trashed, (at least that would probably be the System 9 solution). They view the manual entry of the servers (listed as "optional" on the setup screen) as a temporary fix for a problem in my software.
Before I go further I thought I'd check here for the voice of expertise and sanity.
Please don't tell me that I need to reload the system software!
Thanks for you insights
Ken

Where you suggested is where I put the DNS server address that the tech person gave me. (on the TCP configuration page).
Yes, you can right down the ones there in case you want to put them back, or even have all of them there, but the ones I gave you are safer & more reliable than what most ISPs give you.
So what does flushing the DNS cache do?
The Cache can become Stale, outdated IPs, or just plain Corrupted, it's there to speed lookups and flushing it just takes a bit more time to go out on the Internet and look them up again.
TCP Stack...
http://en.wikipedia.org/wiki/TCP/IP_model

Tcp stack tuning

recently I've been playing with TCP stack in the kernel, and found an option that could give the same low latency response as in windows (especially if you compare firefox on windows and on linux)
sysctl net.ipv4.tcp_low_latency = 1
now tcp connections seem to be established a bit faster
do you also have some nice tips on tuning the TCP stack?

I add the following tweaks to my linux boxes:
echo 2097136 > /proc/sys/net/core/rmem_max
echo 2097136 > /proc/sys/net/core/wmem_max
echo 524284 > /proc/sys/net/core/rmem_default
echo 524284 > /proc/sys/net/core/wmem_default
echo "4096 87380 2097136" > /proc/sys/net/ipv4/tcp_rmem
echo "4096 65536 2097136" > /proc/sys/net/ipv4/tcp_wmem
echo 1 > /proc/sys/net/ipv4/tcp_low_latency
Some information about tcp/ip tuning can be found here:
http://www-didc.lbl.gov/TCP-tuning/linux.html
and
http://ipsysctl-tutorial.frozentux.net/ … ables.html

What RFC:s are implemented in Solaris�s TCP stack?

I am trying to find out wich of the following TCP related RFC:s are implemented in the Solaris TCP stack:
RFC0793
RFC1122
RFC2581
RFC1323
RFC2081
RFC1191
RFC1981
RFC2414
RFC2481
RFC2884

Hi Jeny,
refer this URL:
http://www.rvs.uni-hannover.de/people/voeckler/tune/EN/tune.html
Thanks.
regards,
senthilkumar
SUN - DTS

Core dump: dbx stack trace

Can anyone point to a good doco on how to interpret stack trace from Solaris core file?
For example,
strcasecmp(0xfedf7cd8, 0x47534b53, 0x4b3ee0, 0x619c50, 0xff327234, 0xff33c000), at 0xff2cf390
what do those 6 addresses in brackets represent?
Thanks

Please take a look at http://forum.sun.com/thread.jspa?forumID=10&threadID=9801
or search this forum for 'pstack output format'
Regards,
Sergey.

Broken TCP stack in latest kernel when under heavy load

I'm running an Arch box with a decent amount of HTTP traffic. After upgrading to the latest kernel I've seen that packets are send from the wrong source and destination address. This only applies during heavy load (100+ requests per second). tcpdump shows the following:
18:52:58.512573 IP 0.0.0.0.80 > 0.0.0.0.4316: Flags [FP.], seq 0, ack 1, win 14400, length 0
18:52:58.512600 IP 0.0.0.0.80 > 0.0.0.0.56546: Flags [FP.], seq 0, ack 1, win 14400, length 0
18:52:58.512621 IP 0.0.0.0.80 > 0.0.0.0.4535: Flags [FP.], seq 0, ack 1, win 14600, length 0
18:52:58.512641 IP 0.0.0.0.80 > 0.0.0.0.3528: Flags [FP.], seq 0, ack 1, win 14600, length 0
18:52:58.512662 IP 0.0.0.0.80 > 0.0.0.0.4509: Flags [FP.], seq 0, ack 1, win 14400, length 0
18:52:58.512682 IP 0.0.0.0.80 > 0.0.0.0.65040: Flags [FP.], seq 0, ack 1, win 14600, length 0
18:52:58.512702 IP 0.0.0.0.80 > 0.0.0.0.2455: Flags [FP.], seq 0, ack 1, win 10240, length 0
18:52:58.512722 IP 0.0.0.0.80 > 0.0.0.0.16545: Flags [FP.], seq 0:268, ack 1, win 15008, length 268
18:52:58.519258 IP 0.0.0.0.80 > 0.0.0.0.29802: Flags [FP.], seq 0:268, ack 1, win 980, options [nop,nop,TS val 745514 ecr 1317559555], length 268
18:52:58.565907 IP 0.0.0.0.80 > 0.0.0.0.32376: Flags [FP.], seq 0, ack 1, win 14400, length 0
18:52:58.619241 IP 0.0.0.0.80 > 0.0.0.0.50493: Flags [FP.], seq 0:268, ack 1, win 11256, options [nop,nop,TS val 745544 ecr 9539361], length 268
18:52:58.805927 IP 0.0.0.0.80 > 0.0.0.0.20852: Flags [FP.], seq 3025419976:3025420244, ack 3037671074, win 967, options [nop,nop,TS val 745600 ecr 6445640], length 268
18:52:58.805953 IP 0.0.0.0.80 > 0.0.0.0.65025: Flags [FP.], seq 1663827778:1663828046, ack 2127675352, win 707, options [nop,nop,TS val 745600 ecr 457812708], length 268
18:52:58.845918 IP 0.0.0.0.80 > 0.0.0.0.2217: Flags [FP.], seq 0:268, ack 1, win 707, options [nop,nop,TS val 745612 ecr 546643], length 268
18:52:59.099245 IP 0.0.0.0.80 > 0.0.0.0.5112: Flags [FP.], seq 0:268, ack 1, win 15008, length 268
18:52:59.152582 IP 0.0.0.0.80 > 0.0.0.0.1175: Flags [FP.], seq 0:268, ack 1, win 15008, length 268
18:52:59.232612 IP 0.0.0.0.80 > 0.0.0.0.47217: Flags [FP.], seq 684621876:684622144, ack 3544859356, win 11256, length 268
18:52:59.659258 IP 0.0.0.0.80 > 0.0.0.0.3098: Flags [FP.], seq 2105858244:2105858512, ack 3896053916, win 980, options [nop,nop,TS val 745856 ecr 52041], length 268
18:52:59.659290 IP 0.0.0.0.80 > 0.0.0.0.3099: Flags [FP.], seq 18772067:18772335, ack 2568646283, win 980, options [nop,nop,TS val 745856 ecr 52041], length 268
18:52:59.759244 IP 0.0.0.0.80 > 0.0.0.0.18780: Flags [FP.], seq 0:268, ack 1, win 707, options [nop,nop,TS val 745886 ecr 168876], length 268
18:52:59.845907 IP 0.0.0.0.80 > 0.0.0.0.58449: Flags [FP.], seq 0, ack 1, win 980, options [nop,nop,TS val 745912 ecr 528058426], length 0
18:52:59.925936 IP 0.0.0.0.80 > 0.0.0.0.65137: Flags [FP.], seq 0:268, ack 1, win 15008, length 268
18:52:59.979497 IP 0.0.0.0.80 > 0.0.0.0.2920: Flags [FP.], seq 0:268, ack 1, win 980, options [nop,nop,TS val 745952 ecr 18879], length 268
18:52:59.979527 IP 0.0.0.0.80 > 0.0.0.0.2922: Flags [FP.], seq 0:268, ack 1, win 980, options [nop,nop,TS val 745952 ecr 18879], length 268
18:52:59.979553 IP 0.0.0.0.80 > 0.0.0.0.2940: Flags [FP.], seq 0:268, ack 1, win 980, options [nop,nop,TS val 745952 ecr 18879], length 268
Source and destination ports are correctly set. Wireshark shows the correct HTML inside the packets that are returned to 0.0.0.0. The web server log also looks normal; the correct IP address is displayed and logged as a successful request.
When dropping incomming traffic on port 80 on eth0 everything works as expected (when requesting the server on eth1, which otherwise fails).
I'm running on "Linux srv 3.0-ARCH #1 SMP PREEMPT Wed Oct 19 12:14:48 UTC 2011 i686" which is the latest kernel in the repos. When booting the fallback image this problem does not exist, all packets are correctly addressed no matter how much load I put on the server.
Does anyone else have this problem?
Edit:
Running lighttpd 1.4.29. No tweaked kernel/TCP parameters whatsoever.
Last edited by nullvoid (2011-10-29 17:19:57)

Did a full reinstall of Arch on another machine and the problem still persist. Tried with Apache and Nginx, same behaviour as with Lighttpd. Could anyone else using an arch box under heavy load see if there's activity from 0.0.0.0?
Hint:
# tcpdump -n host 0.0.0.0
I'll do a bug report upstream later today.

Simens TCP/IP stack

Hi,
I worked all the day to watch TCP packets traveling between my J2ME client (GPRS connection) and my J2EE server (Internet connection).
I used WireShark (ex Ethereal) to sniff the network.
I could see through this sniffer that sometimes, my client TCP connection are not terminated (FIN flag). After, another connection (SYN flag) is established and everything is fine...and maybe after it will appear again...
In addition, sometimes (again), my client write on its socket outputstream and I can't see the TCP packet on my sniffer (so my server is waiting until a timeout occurs)...
(see my last post... http://forum.java.sun.com/thread.jspa?threadID=5261959)
I work on a Siemens TC65. Globally, do you guys saw some weird stuff like this with mobile TCP stack ? I mean is there something to know about TCP protocol with mobile phone?
I'm really pissed about this I don't know if I made a mistake or if GPRS connection is not reliable with TCP!
Thanks...

AdrienD wrote:
SIEMENS
TC65
REVISION 02.800I never heard of this one... We are still working with the 2.000 releases and we are getting prereleases of the rev 3 modules soon. Is this one of those maybee? If so, you might try a rev 2.000 module..
What is your client, and what is your server, and where are they located?My server is in my private network. I added a NAT on my router to link every TCP connection on port 9000 to my server private ip address. That's called port forwarding.
My client is connected through GPRS on its local mobile network to my ISP router (I guess).
When I see a TCP packet coming from my client, source IP address is an Internet IP so I think it is my ISP public IP address ....
My server...<-------------------> My router (with NAT on TCP port 9000) <------------INTERNET------------> ISP Router <----------------------> My clientYes, usually, the GPRS network is a NAT'ed network, meaning that every unit will present itself with the same IP to the server. The ISP NAT router manages TCP connections and therefore knows where it should the TCP packets to. This way, you can't directly connect to any of the GPRS units.
Other ISP might actually give every GPRS unit a real internet IP, making it possible to connect to the units directly. We have our own APN, and the units get an IP directly form out own authentication server and reside in our own network via a VPN connection. This way we have all the freedom we need.

Printing Line numbers while dumping stack trace during crash..

Hi,
I want to dump the stack trace of all threads with the line numbers when the program crashes. I am able to do that by cathing the signals and invoking "pstack" utility to dump the stack. But it does not dump the line numbers of each function. Is there some way of doing that?
Thanks
Atul

If you run the executable under dbx then you can type 'where' when the program crashes or set a breakpoint in your signal handler. Line numbers will only show up in the dbx stack trace if the application was compiled with -g and not stripped.

Bug: Stack trace when starting Jdev 10.1.3, Solved (kind of)

I've been using 10.1.3 for a while now and it has been relatively trouble-free. However,
late last week it started dumping the following trace at startup. I haven't changed
anything recently that I recall. I did some poking around looking for anything that
looked wrong or perhaps a log file that would tell me what was wrong but that's
the whole needle in a haystack thing.
Any ideas on where to start looking for a solution this problem? This is an older version
of JDeveloper but I was not able to find an internally available later version. Any pointers
on that front would be appreciated if that would get me back to writing code.
Thanks!
====
Oracle JDeveloper 10g 10.1.3
Copyright 1997, 2005 Oracle. All Rights Reserved
java.lang.NullPointerException
at oracle.ideimpl.docking.DockStationImpl.stateChanged(DockStationImpl.java:1854)
at oracle.ideimpl.docking.DockStationImpl.initialize(DockStationImpl.java:258)
at oracle.ide.IdeCore.initializeModules(IdeCore.java:1409)
at oracle.ide.IdeCore.startupImpl(IdeCore.java:1190)
at oracle.ide.Ide.startup(Ide.java:672)
at oracle.ideimpl.Main.start(Main.java:49)
at oracle.ideimpl.Main.main(Main.java:25)
java.lang.NullPointerException
at oracle.jdevimpl.audit.editor.AuditEditorManager.<init>(AuditEditorManager.java:94)
at oracle.jdevimpl.audit.editor.AuditEditorManager.create(AuditEditorManager.java:78)
at oracle.jdevimpl.audit.core.AuditAddin.initializeUI(AuditAddin.java:149)
at oracle.jdeveloper.audit.AbstractAuditAddin.initialize(AbstractAuditAddin.java:56)
at oracle.ideimpl.extension.AddinManagerImpl.initializeAddin(AddinManagerImpl.java:416)
at oracle.ideimpl.extension.AddinManagerImpl.initializeAddins(AddinManagerImpl.java:227)
at oracle.ideimpl.extension.AddinManagerImpl.initAddinLoadset(AddinManagerImpl.java:184)
at oracle.jdevimpl.audit.core.AuditExtension.initialize(AuditExtension.java:31)
at oracle.ideimpl.extension.AddinManagerImpl.initializeAddin(AddinManagerImpl.java:416)
at oracle.ideimpl.extension.AddinManagerImpl.initializeAddins(AddinManagerImpl.java:227)
at oracle.ideimpl.extension.AddinManagerImpl.initProductAndUserAddins(AddinManagerImpl.java:156)
at oracle.ide.IdeCore.initProductAndUserAddins(IdeCore.java:1431)
at oracle.ide.IdeCore.startupImpl(IdeCore.java:1196)
at oracle.ide.Ide.startup(Ide.java:672)
at oracle.ideimpl.Main.start(Main.java:49)
at oracle.ideimpl.Main.main(Main.java:25)
java.lang.NullPointerException
at oracle.jdevimpl.webapp.jsp.JspTranslator.getInputTypes(JspTranslator.java:80)
at oracle.jdeveloper.compiler.UnifiedBuildSystem.registerTranslator(UnifiedBuildSystem.java:1114)
at oracle.jdeveloper.compiler.JCompiler.registerTranslator(JCompiler.java:869)
at oracle.jdevimpl.webapp.jsp.JspTranslator.initialize(JspTranslator.java:244)
at oracle.ideimpl.extension.AddinManagerImpl.initializeAddin(AddinManagerImpl.java:416)
at oracle.ideimpl.extension.AddinManagerImpl.initializeAddins(AddinManagerImpl.java:227)
at oracle.ideimpl.extension.AddinManagerImpl.initProductAndUserAddins(AddinManagerImpl.java:156)
at oracle.ide.IdeCore.initProductAndUserAddins(IdeCore.java:1431)
at oracle.ide.IdeCore.startupImpl(IdeCore.java:1196)
at oracle.ide.Ide.startup(Ide.java:672)
at oracle.ideimpl.Main.start(Main.java:49)
at oracle.ideimpl.Main.main(Main.java:25)
java.lang.NullPointerException
at oracle.jdevimpl.webapp.html.HtmlAddin.addinsLoaded(HtmlAddin.java:305)
at oracle.ide.IdeCore.fireIdeEvent(IdeCore.java:709)
at oracle.ide.IdeCore.mav$fireIdeEvent(IdeCore.java)
at oracle.ide.IdeCore$5.run(IdeCore.java:689)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
java.lang.NullPointerException
at oracle.jdevimpl.webapp.template.addin.TemplateAddin.addinsLoaded(TemplateAddin.java:215)
at oracle.ide.IdeCore.fireIdeEvent(IdeCore.java:709)
at oracle.ide.IdeCore.mav$fireIdeEvent(IdeCore.java)
at oracle.ide.IdeCore$5.run(IdeCore.java:689)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
java.lang.NullPointerException
at oracle.jdevimpl.webapp.jsp.JspAddin.addinsLoaded(JspAddin.java:421)
at oracle.ide.IdeCore.fireIdeEvent(IdeCore.java:709)
at oracle.ide.IdeCore.mav$fireIdeEvent(IdeCore.java)
at oracle.ide.IdeCore$5.run(IdeCore.java:689)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Message was edited by:
cfreiwal
Message was edited by:
cfreiwal

OK next step was to install JDeveloper 11g RC4. It wouldn't load from the web from Firefox but a coworker had a copy of the zip file.
I set it up and it, seemingly successfully converted my project from 10g to 11g. However
it's still dumping a stack this time when trying to set up the JDK.
Emacs is looking good at this point.
java.lang.NullPointerException
at oracle.jdeveloper.library.JProjectLibraryList.findJDK(JProjectLibraryList.java:71)
at oracle.jdeveloper.model.JProjectLibraries.getJDK(JProjectLibraries.java:112)
at oracle.jdeveloper.model.JProjectLibrariesPanel.reload(JProjectLibrariesPanel.java:264)
at oracle.jdeveloper.model.JProjectLibrariesPanel.onProjectPanelEntry(JProjectLibrariesPanel.java:221)
at oracle.ide.model.panels.ProjectSettingsTraversablePanel.onEntry(ProjectSettingsTraversablePanel.java:88)
at oracle.ide.panels.MDDPanel.enterTraversableImpl(MDDPanel.java:1109)
at oracle.ide.panels.MDDPanel.enterTraversable(MDDPanel.java:1090)
at oracle.ide.panels.MDDPanel.mav$enterTraversable(MDDPanel.java:116)
at oracle.ide.panels.MDDPanel$Tsl.updateSelectedNavigable(MDDPanel.java:1546)
at oracle.ide.panels.MDDPanel$Tsl.updateSelection(MDDPanel.java:1414)
at oracle.ide.panels.MDDPanel$Tsl.actionPerformed(MDDPanel.java:1408)
at javax.swing.Timer.fireActionPerformed(Timer.java:271)
at javax.swing.Timer$DoPostEvent.run(Timer.java:201)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:153)
at java.awt.Dialog$1.run(Dialog.java:535)
at java.awt.Dialog$2.run(Dialog.java:565)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Dialog.show(Dialog.java:563)
at java.awt.Component.show(Component.java:1302)
at java.awt.Component.setVisible(Component.java:1255)
at oracle.bali.ewt.dialog.JEWTDialog.runDialog(Unknown Source)
at oracle.bali.ewt.dialog.JEWTDialog.runDialog(Unknown Source)
at oracle.ide.dialogs.WizardLauncher.runDialog(WizardLauncher.java:55)
at oracle.ide.panels.TDialogLauncher.showDialog(TDialogLauncher.java:225)
at oracle.ide.model.panels.PropertiesDialog.showDialog(PropertiesDialog.java:337)
at oracle.ide.model.panels.PropertiesDialog.showDialog(PropertiesDialog.java:162)
at oracle.ide.model.panels.ProjectPropertiesDialog.showDialog(ProjectPropertiesDialog.java:74)
at oracle.jdeveloper.model.JProjectStructureController.handleEvent(JProjectStructureController.java:118)
at oracle.ide.controller.IdeAction.performAction(IdeAction.java:513)
at oracle.ide.controller.IdeAction.actionPerformedImpl(IdeAction.java:843)
at oracle.ide.controller.IdeAction.actionPerformed(IdeAction.java:486)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:232)
at java.awt.Component.processMouseEvent(Component.java:5517)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3135)
at java.awt.Component.processEvent(Component.java:5282)
at java.awt.Container.processEvent(Container.java:1966)
at java.awt.Component.dispatchEventImpl(Component.java:3984)
at java.awt.Container.dispatchEventImpl(Container.java:2024)
at java.awt.Component.dispatchEvent(Component.java:3819)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
at java.awt.Container.dispatchEventImpl(Container.java:2010)
at java.awt.Window.dispatchEventImpl(Window.java:1791)
at java.awt.Component.dispatchEvent(Component.java:3819)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

Sqlplus stack trace, dynamic link error.

When using sqlplus through the Oracle Enterprise Manager, or on the commandline, if I try to query a XMLType table, it dumps a stack trace, failing with the error message:
Dynamic link error: libxdb.so: cannot open shared object file: No such file or directory
I've done a full Oracle 9.2.0.1.0 Client installation, but this library isn't in my $ORACLE_HOME/lib. How do I get this file?

Hi,
Maybe not much use to you, but on Solaris, with a full Enterprise install, this library is in my $ORACLE_HOME/lib.
So maybe you can find it on the EE CDROM?
Regards
Pete

How to get Line numbers in KVM stack traces

Hello!
I am fairly new to kvm programming and might have missed the obvious. When my program dumps a stack trace under kvm it gives me an offset (I dont know what the number corresponds to) from the method but not source line numbers like I am used to seeing under J2SE. I complie the code using -g and run it using kvm_g. For example, I see soemething like
java.lang.NullPointerException
at myclass.mymethod(+5)
at parentclass.parentmethod(+10)
Where I dont know what the +5 or +10 stand for as it relates to my source code.
Can somebody help with trying to correlate the stack trace to my source code.
Thanks.
Ranga.

I would like to know too. Has anyone found an answer?

Import only table but got PLSQL CALL STACK.

Hi,
I am using ORACLE DATABASE 11g and Linux Enterprise 5. I am executing a command to import only one table from other schema to our schema. This import is done on netwrok_link parameter. In this case the log shows me many errors but the table gets imported.
What does these error means ? can anyone please suggest how to correct them...
$impdp tables=IUT01.FLX_DD_FIN_STMT_LOGS network_link=DBLINK_IUT01 remap_schema=iut01:ngpiut01 remap_tablespace=iut01:ngpiut01 table_exists_action=replace
Import: Release 11.2.0.3.0 - Production on Wed Mar 28 10:06:54 2012
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Username: sys as sysdba
Password:
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SYS"."SYS_IMPORT_TABLE_01": sys/******** AS SYSDBA tables=IUT01.FLX_DD_FIN_STMT_LOGS network_link=DBLINK_IUT01 remap_schema=iut01:ngpiut01 remap_tablespace=iut01:ngpiut01 table_exists_action=replace
Estimate in progress using BLOCKS method...
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 2 MB
ORA-39126: Worker unexpected fatal error in KUPW$WORKER.CONFIGURE_METADATA_UNLOAD [WORK_PHASE]
ORA-03113: end-of-file on communication channel
ORA-02063: preceding line from DBLINK_IUT01
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPW$WORKER", line 9001
----- PL/SQL Call Stack -----
object      line object
handle    number name
0x8aabd0e0     20462 package body SYS.KUPW$WORKER
0x8aabd0e0      9028 package body SYS.KUPW$WORKER
0x8aabd0e0      6814 package body SYS.KUPW$WORKER
0x8aabd0e0      2691 package body SYS.KUPW$WORKER
0x8aabd0e0      9697 package body SYS.KUPW$WORKER
0x8aabd0e0      1775 package body SYS.KUPW$WORKER
0x9f3376a0         2 anonymous block
Processing object type TABLE_EXPORT/TABLE/TABLE
. . imported "NGPIUT01"."FLX_DD_FIN_STMT_LOGS"             2921 rows
Processing object type TABLE_EXPORT/TABLE/INDEX/INDEX
Processing object type TABLE_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
Processing object type TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type TABLE_EXPORT/TABLE/COMMENT
Processing object type TABLE_EXPORT/TABLE/CONSTRAINT/REF_CONSTRAINT
ORA-39083: Object type REF_CONSTRAINT failed to create with error:
ORA-02298: cannot validate (NGPIUT01.FLX_DD_FIN_ACCOUNT_CODE_FK) - parent keys not found
Failing sql is:
ALTER TABLE "NGPIUT01"."FLX_DD_FIN_STMT_LOGS" ADD CONSTRAINT "FLX_DD_FIN_ACCOUNT_CODE_FK" FOREIGN KEY ("ACCOUNT_CODE") REFERENCES "NGPIUT01"."FLX_DD_ACCOUNTS_B" ("ACCOUNT_CODE") ENABLE
Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
ORA-39126: Worker unexpected fatal error in KUPW$WORKER.DISPATCH_WORK_ITEMS [TABLE_STATISTICS]
ORA-31600: invalid input value 100001 for parameter HANDLE in function CLOSE
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 105
ORA-06512: at "SYS.DBMS_METADATA", line 709
ORA-06512: at "SYS.DBMS_METADATA", line 5734
ORA-06512: at "SYS.DBMS_METADATA", line 1475
ORA-06512: at "SYS.DBMS_METADATA", line 7481
ORA-06512: at "SYS.KUPW$WORKER", line 2792
ORA-02067: transaction or savepoint rollback required
ORA-06512: at "SYS.DBMS_METADATA", line 1475
ORA-06512: at "SYS.DBMS_METADATA", line 7481
ORA-06512: at "SYS.KUPW$WORKER", line 10928
ORA-03113: end-of-file on communication channel
ORA-02055: distributed update operation failed; rollback required
ORA-02063: preceding lines from DBLINK_IUT01
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPW$WORKER", line 9001
----- PL/SQL Call Stack -----
object      line object
handle    number name
0x8aabd0e0     20462 package body SYS.KUPW$WORKER
0x8aabd0e0      9028 package body SYS.KUPW$WORKER
0x8aabd0e0      9831 package body SYS.KUPW$WORKER
0x8aabd0e0      1775 package body SYS.KUPW$WORKER
0x9f3376a0         2 anonymous block
ORA-39126: Worker unexpected fatal error in KUPW$WORKER.CONFIGURE_METADATA_UNLOAD [POST_WORK_PHASE]
ORA-03113: end-of-file on communication channel
ORA-02063: preceding line from DBLINK_IUT01
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPW$WORKER", line 9001
----- PL/SQL Call Stack -----
object      line object
handle    number name
0x8aabd0e0     20462 package body SYS.KUPW$WORKER
0x8aabd0e0      9028 package body SYS.KUPW$WORKER
0x8aabd0e0      6814 package body SYS.KUPW$WORKER
0x8aabd0e0      2691 package body SYS.KUPW$WORKER
0x8aabd0e0      9697 package body SYS.KUPW$WORKER
0x8aabd0e0      1775 package body SYS.KUPW$WORKER
0x9f3376a0         2 anonymous block
Job "SYS"."SYS_IMPORT_TABLE_01" completed with 10 error(s) at 10:07:27

ORA-03113: end-of-file on communication channelThis error means that you have a communication error. The Data Pump code has automatic restart, so when this happens, the worker process KUPW$WORKER fails with a fatal error, but the MCP process restarts the worker and restarts the job where it left off.
Is the import command getting terminated in middle of transaction and putting the call stack on the screen. Previously i dint >used to get these errors in import. What could be the reason ?Part of the Data Pump job is terminated, but the complete job is not terminated. There is an MCP process that runs and controls the job, there are also worker process(es) that run that are assigned work items to perform. In your case the work item fails because it can't communicate with some other process. This causes the worker process to die. The MCP detects this and starts another worker process and assigns the same work item that failed. When the worker process fails, it dumps its stack.
All this means is that the communication works, but looks like it is flaky. The worker process can communicate sometimes, but fails others. I have no idea which layer is flaky.
Dean

Unable to disable TCP keep alive probing

Hello,
I work with a mobile phone which seems to have problems if a keep alive packet arrives close with a payload packet. Therefore I would like to disable keep alive probing on my Java 1.5 windows XP plattform.
I tried it with:
Socket socket = serverSocket.accept();
socket.setKeepAlive(false);
However the Java application sends keep alive probes anyway. Is this a known bug? Are there some workarounds?
Even if the keep alive is enabled, Java seems to violate RFC recommendations guiding to set an interval of 2 hours. If I sniff with Ethereal I can see keep alive packets in an interval shorter than 2 minutes (sent from the java application socket).
Is this another bug?
Kind regards
Hans-Joerg

(a) Java doesn't send keepalives at all, so it's not 'another bug'. The TCP stack sends them.
(b) TCP may only do so if the application has specifically requested them, which you haven't.
(c) Java doesn't turn TCP keepalive on by default.
(d) TCP may only send a keepalive packet every two hours, unless a global system setting has been changed, which you haven't mentioned.
So, (e) if you're getting them unasked, and more frequently than two hours, either the TCP stack has a major bug, which isn't likely, or they're not keepalive packets, which is orders of magnitude more likely.
The phone shouldn't have any problem with real keepalive packets: they're just acknowledgements quoting a sequence number 1 less than the receiver expects, so the receiver replies with the correct sequence number. This shouldn't cause a competently implemented TCP stack any grief whether in a mobile phone or a supercomputer.
So I would examine your assumption that it's a keepalive packet.

TCP segment Overwrite

Recently, I've been seeing a ton of messages on the IPS Event Viewer stating that TCP Segment Overwrites have been detected. The events are from either the IPS-A to our DMZ or vice versa. It just started whenever we added some servers to the network. Does anybody have any suggestions? We traced the packets, it's not hacker related. It seems like maybe a server or app. may be causing the issue. The problem is isolating it. I would appreciate any feedback you could provide. Thanks!

TCP normalization
Through intentional or natural TCP session segmentation, some classes of attacks can be hidden. To make sure policy enforcement can occur with no false positives and false negatives, the state of the two TCP endpoints must be tracked and only the data that is actually processed by the real host endpoints should be passed on. Overlaps in a TCP stream can occur, but are extremely rare except for TCP segment retransmits. Overwrites in the TCP session should not occur. If overwrites do occur, someone is intentionally trying to elude the security policy or the TCP stack implementation is broken. Maintaining full information about the state of both endpoints is not possible unless the sensor acts as a TCP proxy. Instead of the sensor acting as a TCP proxy, the segments will be ordered properly and the normalizer will look for any abnormal packets associated with evasion and attacks.
http://www.cisco.com/en/US/products/hw/vpndevc/ps4077/products_configuration_guide_chapter09186a00804cf52e.html

ASIP dumps TCP stack nightly

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