4devwithgit opened a new issue, #354: URL: https://github.com/apache/mina-sshd/issues/354
### Version 2.7.0 ### Bug description We are using Apache mina jars v2.7.0 in our application. Our customer on this version, reported the out of memory(OOM) issue with the Apache mina sftp client, and there is a build of 7000 plus threads of sshd-SschClient ***WARNING*** Dump Event "systhrow" (00040000) Detail "java/lang/OutOfMemoryError" "Failed to allocate JNIEnv" received Here is the thread dump, which you use to analyze the issue, https://syncsortinc-my.sharepoint.com/:t:/r/personal/dev_sahu_syncsort_com/Documents/1/_2023/defects/L3REQ-43331_GENPACT/javacore.txt?csf=1&web=1&e=mdPeac We can see there are 7000+ threads of which majority are for "sshd-SshClient" like, **sshd-SshClient**[154d0fa0]-timer-thread-1 ### Actual behavior Getting OOM error with apache mina sftp client ### Expected behavior it should be able to process without OOM. ### Relevant log output ```Shell From the thread dump Thread Name sshd-SshClient[154d0fa0]-timer-thread-1 State Runnable Java Stack at sun/misc/Unsafe.park(Native Method) at java/util/concurrent/locks/LockSupport.parkNanos(LockSupport.java:226(Compiled Code)) at java/util/concurrent/locks/AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2089(Compiled Code)) at java/util/concurrent/ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1104(Compiled Code)) at java/util/concurrent/ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:820(Compiled Code)) at java/util/concurrent/ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1085(Compiled Code)) at java/util/concurrent/ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145(Compiled Code)) at java/util/concurrent/ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635(Compiled Code)) at java/lang/Thread.run(Thread.java:822(Compiled Code)) Native Stack ZwWaitForSingleObject+0x14 (0x00007FFACF1B0874 [ntdll+0xa0874]) WaitForSingleObjectEx+0x93 (0x00007FFACBBC43B3 [KERNELBASE+0x343b3]) monitor_wait_original+0x917 (omrthread.c:4679, 0x00007FFAB7C47237 [J9THR29+0x7237]) omrthread_monitor_wait+0x43 (omrthread.c:4395, 0x00007FFAB7C42AD3 [J9THR29+0x2ad3]) internalAcquireVMAccessNoMutexWithMask+0x2fc (vmaccess.cpp:384, 0x00007FFAB56E1A6C [j9vm29+0x61a6c]) internalAcquireVMAccessClearStatus+0x98 (vmaccess.cpp:336, 0x00007FFAB56E15D8 [j9vm29+0x615d8]) threadParkImpl+0x19e (threadpark.c:98, 0x00007FFAB5738D3E [j9vm29+0xb8d3e]) (0x00007FFAA1A30609) (0x0000000000000003) (0x0000000001AE3D00) (0x000000064E3BD6A8) (0x000000016591FB80) (0x00000000017E9C00) (0x0000000008952800) (0x000000064E3BD6A8) ``` ### Other information _No response_ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@mina.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@mina.apache.org For additional commands, e-mail: dev-h...@mina.apache.org
