[jira] [Comment Edited] (IGNITE-6893) Java Deadlocks monitoring

["Andrey Kuznetsov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-6893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16432429#comment-16432429 ] 

Andrey Kuznetsov edited comment on IGNITE-6893 at 4/10/18 3:10 PM:
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Unified failure handling implemented in [1] can be used to handle deadlocks.

As for detection, the most tempting way is the use of {{ThreadMXBean::findDeadlockedThreads}}, but we are to estimate its overhead first, especially for the large number of active threads.

[1] https://issues.apache.org/jira/browse/IGNITE-6890


was (Author: andrey-kuznetsov):
Unified failure handling implemented in [1] can be used to handle deadlocks.

As for detection, the most tempting way is the use of {{ThreadMXBean::findDeadlockedThreads}}, but we are to estimate its overhead first, especially for the large number of active threads.

> Java Deadlocks monitoring
> -------------------------
>
>                 Key: IGNITE-6893
>                 URL: https://issues.apache.org/jira/browse/IGNITE-6893
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Anton Vinogradov
>            Assignee: Andrey Kuznetsov
>            Priority: Major
>              Labels: iep-7
>             Fix For: 2.6
>
>
> Java Level Deadlocks
> Description
> This situation occurs if user or Ignite comes to a Java-level deadlock due to a bug in code - reverse order synchronized(mux1) {synchronized (mux2) {}}  sections, reverse order reentrant locks, etc.
> Detection and Solution
> This most likely cannot be resolved automatically and will require JVM restart.
> We can implement periodical threaddumps analysis and detect the deadlock. 
> Report
> Deadlock should be reported to the logs.
> Web Console should fire an alert on java deadlock detection and display a warning on UI.



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