Re: Help on JVM hang

Hui Huang wrote: Is this on Redhat 9? If so, try this: + find out java process id + use gdb to attach to the process (gdb - ) + quit gdb The problem just happened again and indeed that trick worked (strace didn't, I think because it doesn't trace all threads, just the one it connects to). I atta

Re: Help on JVM hang

Hui Huang <[EMAIL PROTECTED]> writes: > Joseph Shraibman wrote: >> What about this? >> http://gcc.gnu.org/ml/java/2004-05/msg00064.html >> Do you know what he's talking about? > > Not familiar w/ ResourceBundle implementation. But it looks > like a performance trick to avoid frequent lookup for cl

Re: Help on JVM hang

Hui Huang wrote: It looks like the same issue. IIRC, the problem happened when one thread sleeps on pthread_cond_wait, and another thread in pthread_cond_{signal,broadcast} to wake up the first thread, sometimes kernel failed to change the first thread back to running. So how can I encourage this c

Re: Help on JVM hang

Joseph Shraibman wrote: Hui Huang wrote: Is this on Redhat 9? If so, try this: + find out java process id + use gdb to attach to the process (gdb - ) + quit gdb wait a few seconds, does the process start to run again? If yes, it's a known RH-9 issue (a notification from pthread_cond_broadcast is lo

Re: Help on JVM hang

Hui Huang wrote: Veda N Ponnusamy wrote: Hi, We set the LD_ASSUME_KERNEL=2.2.5 and the hang goes away. But the application is running at 60% speed !! Interesting. You could try LD_ASSUME_KERNEL=2.4.1 (the floating stack version of LinuxThreads), it's generally faster than 2.2.5. Do you know a

Re: Help on JVM hang

Joseph Shraibman wrote: Hui Huang wrote: Veda N Ponnusamy wrote: Hi, We set the LD_ASSUME_KERNEL=2.2.5 and the hang goes away. But the application is running at 60% speed !! Interesting. You could try LD_ASSUME_KERNEL=2.4.1 (the floating stack version of LinuxThreads), it's generally faster t

Re: Help on JVM hang

ess still hangs after attach-detach with gdb, it's something else. Reg Veda -Original Message- From: Hui Huang [mailto:[EMAIL PROTECTED] Sent: Thursday, June 24, 2004 10:39 AM To: Joseph Shraibman Cc: [EMAIL PROTECTED]; Veda N Ponnusamy; [EMAIL PROTECTED] Subject: Re: Help on JVM hang Is

Re: Help on JVM hang

Hui Huang wrote: Is this on Redhat 9? If so, try this: + find out java process id + use gdb to attach to the process (gdb - ) + quit gdb wait a few seconds, does the process start to run again? If yes, it's a known RH-9 issue (a notification from pthread_cond_broadcast is lost in NPTL). Update to A

Re: Help on JVM hang

Hui Huang wrote: Is this on Redhat 9? If so, try this: Yes. + find out java process id + use gdb to attach to the process (gdb - ) + quit gdb Well I killed the process already, but the problem seems to happen every couple of weeks so I'll try that next time. wait a few seconds, does the process s

RE: Help on JVM hang

Shraibman Cc: [EMAIL PROTECTED]; Veda N Ponnusamy; [EMAIL PROTECTED] Subject: Re: Help on JVM hang Is this on Redhat 9? If so, try this: + find out java process id + use gdb to attach to the process (gdb - ) + quit gdb wait a few seconds, does the process start to run again? If yes, it's a

Re: Help on JVM hang

eph Shraibman [mailto:[EMAIL PROTECTED] Sent: Friday, June 11, 2004 1:26 PM To: Calvin Austin Cc: Veda N Ponnusamy; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: Help on JVM hang Calvin Austin wrote: Does it ever resume. 1.5beta2 has more diagnostics in it and you may be able to even attache

Re: Help on JVM hang

EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: Help on JVM hang Calvin Austin wrote: Does it ever resume. 1.5beta2 has more diagnostics in it and you may be able to even attached with jdb (hey tim :*) Without seeing the other threads its difficult to see what is happening, however there was a bug

Re: Help on JVM hang

f the JVM. I didn't try running this app on 1.5 jvm Reg Veda -Original Message- From: Joseph Shraibman [mailto:[EMAIL PROTECTED] Sent: Friday, June 11, 2004 1:26 PM To: Calvin Austin Cc: Veda N Ponnusamy; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: Help on JVM hang Calvin Austi

Re: Help on JVM hang

Calvin Austin wrote: Does it ever resume. 1.5beta2 has more diagnostics in it and you may be able to even attached with jdb (hey tim :*) Without seeing the other threads its difficult to see what is happening, however there was a bug fix in 1.5 to stop the cache growing out of control. A quick

Re: Help on JVM hang

Does it ever resume. 1.5beta2 has more diagnostics in it and you may be able to even attached with jdb (hey tim :*) Without seeing the other threads its difficult to see what is happening, however there was a bug fix in 1.5 to stop the cache growing out of control. A quick test with 1.5 would h

Re: Help on JVM hang

I have. I reported it to sun and they said if they had a repoducable test case they would open a bug. But I could never figure out how to reproduce it. Veda N Ponnusamy wrote: Hi folks, I'm posting this, since I know I can get help only from this community. My application is a heavily mul

Help on JVM hang

Hi folks,     I'm posting this, since I know I can get help only from this community. My application is a heavily multi-threaded java application which is runs in Linux with the following configuration   OS - RH9 Kernel - 2.4.20-30.9smp glibc - glibc-2.3.2-27.9.7 JVM - SUN 1.4.2   My ap

Re: JVM hang

Hi, I tried explicit linking with pthread and there was no libc before that. Even then it seems to hang. It sems to hang in the garbage collection sequence. We observe that the gc seems to be waiting to suspend a socket connection. We are trying to work around the problem. It would be

Re: JVM hang

Christopher Smith wrote: > > On Fri, Mar 31, 2000 at 05:30:52PM -0500, John Rousseau wrote: > > On Friday Mar 31, 2000, Christopher Smith wrote: > > > On Fri, Mar 31, 2000 at 08:14:47AM -0500, John Rousseau wrote: > > > > On Friday Mar 31, 2000, Natarajan SK wrote: > > > > Kevin Hendricks solved

Re: JVM hang

On Fri, Mar 31, 2000 at 05:30:52PM -0500, John Rousseau wrote: > On Friday Mar 31, 2000, Christopher Smith wrote: > > On Fri, Mar 31, 2000 at 08:14:47AM -0500, John Rousseau wrote: > > > On Friday Mar 31, 2000, Natarajan SK wrote: > > > Kevin Hendricks solved a very similar problem for me. This is

Re: JVM hang

On Friday Mar 31, 2000, Christopher Smith wrote: > On Fri, Mar 31, 2000 at 08:14:47AM -0500, John Rousseau wrote: > > On Friday Mar 31, 2000, Natarajan SK wrote: > > Kevin Hendricks solved a very similar problem for me. This is > > assuming that you are using native threads. Try linking in -lpth

Re: JVM hang

On Fri, Mar 31, 2000 at 08:14:47AM -0500, John Rousseau wrote: > On Friday Mar 31, 2000, Natarajan SK wrote: > Kevin Hendricks solved a very similar problem for me. This is > assuming that you are using native threads. Try linking in -lpthread > explicitly on your link line (and make sure you don'

Re: JVM hang

On Friday Mar 31, 2000, Natarajan SK wrote: > Hi, We are facing a JVM hang problem on Linux. We load the JVM > from JNI and do an AttachThread to the main jEnv. Therefrom it > goes executing into some classes and somewhere in the middle > hangs. From the messages printed we find

JVM hang

Hi, We are facing a JVM hang problem on Linux. We load the JVM from JNI and do an AttachThread to the main jEnv. Therefrom it goes executing into some classes and somewhere in the middle hangs. From the messages printed we find out that it seems to be trying to instantiate a class and