[
https://issues.apache.org/jira/browse/SSHD-1179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17435569#comment-17435569
]
Subramaniajeeva commented on SSHD-1179:
---------------------------------------
Here are my findings so far:
* The issue happens only when the client is *SSH-2.0-FlashFXP.*
* The issue occurs while reading the directory(>90% of the time)
* `listener.destroying()` in `SftpSubsystem.destroy` is not getting called
when the issue happens.
The OOM has been recurring every 10 days and the application is getting killed
because of that. Any clue on how to fix this would be helpful.
> Getting OOM after upgrading to 2.6.0
> ------------------------------------
>
> Key: SSHD-1179
> URL: https://issues.apache.org/jira/browse/SSHD-1179
> Project: MINA SSHD
> Issue Type: Bug
> Affects Versions: 2.6.0
> Reporter: Subramaniajeeva
> Priority: Critical
>
> I upgraded mina version from 2.3.0 to 2.6.0 2 months back. Since then I could
> see the number of JVM threads keep on increasing(till ~12500), leading to OOM
> in production systems.
> Here is the stack trace with 2100+ similar threads:
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park({color:#000080}Native Method{color})
> - parking to wait for *<0x000000079f7630c8>* (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at
> java.util.concurrent.locks.LockSupport.park({color:#000080}LockSupport.java:175{color})
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await({color:#000080}AbstractQueuedSynchronizer.java:2039{color})
> at
> java.util.concurrent.LinkedBlockingQueue.take({color:#000080}LinkedBlockingQueue.java:442{color})
> at
> org.apache.sshd.sftp.server.SftpSubsystem.run({color:#000080}SftpSubsystem.java:267{color})
> at
> java.util.concurrent.Executors$RunnableAdapter.call({color:#000080}Executors.java:511{color})
> at
> java.util.concurrent.FutureTask.run({color:#000080}FutureTask.java:266{color})
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker({color:#000080}ThreadPoolExecutor.java:1149{color})
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run({color:#000080}ThreadPoolExecutor.java:624{color})
> at java.lang.Thread.run({color:#000080}Thread.java:748{color})
>
> I tried to debug and I'm not able to isolate the root cause. Is it identified
> and fixed already in 2.7.0?
> [~lgoldstein] Any help would be appreciated.
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
