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Posted to issues@ratis.apache.org by "Tsz-wo Sze (Jira)" <ji...@apache.org> on 2022/08/16 16:32:00 UTC
[jira] [Updated] (RATIS-1603) TimeoutScheduler can have a huge amount of threads and cause OOM
[ https://issues.apache.org/jira/browse/RATIS-1603?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tsz-wo Sze updated RATIS-1603:
------------------------------
Fix Version/s: 2.4.0
> TimeoutScheduler can have a huge amount of threads and cause OOM
> ----------------------------------------------------------------
>
> Key: RATIS-1603
> URL: https://issues.apache.org/jira/browse/RATIS-1603
> Project: Ratis
> Issue Type: Bug
> Components: util
> Affects Versions: 2.0.0
> Reporter: Baolong Mao
> Assignee: Tsz-wo Sze
> Priority: Major
> Fix For: 2.4.0, 3.0.0
>
> Attachments: image-2022-06-29-09-33-28-818.png, image-2022-06-29-09-37-07-089.png, image-2022-07-19-15-09-06-529.png, screenshot-1.png
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> !image-2022-06-29-09-33-28-818.png!
> The callstack are same for the 20k threads
> {code:java}
> "java.util.concurrent.ThreadPoolExecutor$Worker@64f771ea[State = -1, empty queue]" #486880 daemon prio=5 os_prio=0 cpu=0.14ms elapsed=35.35s allocated=1696B defined_classes=0 tid=0x00007f136fb65800 nid=0x2130e1 waiting on condition [0x00007f0f94ccf000]
> java.lang.Thread.State: TIMED_WAITING (parking)
> at jdk.internal.misc.Unsafe.park(java.base@11.0.15-ga/Native Method)
> - parking to wait for <0x00007f1e0178ef68> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.parkNanos(java.base@11.0.15-ga/LockSupport.java:234)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(java.base@11.0.15-ga/AbstractQueuedSynchronizer.java:2123)
> at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(java.base@11.0.15-ga/ScheduledThreadPoolExecutor.java:1182)
> at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(java.base@11.0.15-ga/ScheduledThreadPoolExecutor.java:899)
> at java.util.concurrent.ThreadPoolExecutor.getTask(java.base@11.0.15-ga/ThreadPoolExecutor.java:1054)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(java.base@11.0.15-ga/ThreadPoolExecutor.java:1114)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(java.base@11.0.15-ga/ThreadPoolExecutor.java:628)
> at java.lang.Thread.run(java.base@11.0.15-ga/Thread.java:829) {code}
> I found the problem is The following code, we should better give a maxsize for the ScheduledThreadPoolExecutor
>
> !image-2022-06-29-09-37-07-089.png!
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