[jira] [Commented] (HBASE-25720) Sync WAL stuck when prepare flush cache will prevent flush cache and cause OOM

["March Wang (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-25720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17613248#comment-17613248 ] 

March Wang commented on HBASE-25720:
------------------------------------

Hi [~Xiaolin Ha], Could you please let me know how to fix this issue? Thanks!

> Sync WAL stuck when prepare flush cache will prevent flush cache and cause OOM
> ------------------------------------------------------------------------------
>
>                 Key: HBASE-25720
>                 URL: https://issues.apache.org/jira/browse/HBASE-25720
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 1.4.13
>            Reporter: Xiaolin Ha
>            Assignee: Xiaolin Ha
>            Priority: Major
>         Attachments: prepare-flush-cache-stuck.png
>
>
> We call HRegion#doSyncOfUnflushedWALChanges when preparing to flush cache. But this WAL sync may stuck, and abort the flush of cache. 
> !prepare-flush-cache-stuck.png|width=519,height=246!
> If we cannot aware of this problem in time, RS will OOM kill.
> I think we should force abort RS when sync stuck in preparing, like in committing snapshots.
>  
>  



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