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https://issues.apache.org/jira/browse/HBASE-9420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13775631#comment-13775631
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Enis Soztutar commented on HBASE-9420:
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>From my understanding without this synchronization, syncedTillHere might go
>down, but does it affect semantics. At worst case it will cause an extra snyc
>no?
> Math.max() on syncedTillHere lacks synchronization
> --------------------------------------------------
>
> Key: HBASE-9420
> URL: https://issues.apache.org/jira/browse/HBASE-9420
> Project: HBase
> Issue Type: Bug
> Reporter: Ted Yu
> Assignee: Ted Yu
> Fix For: 0.98.0
>
> Attachments: 9420-v1.txt, 9420-v2.txt
>
>
> In FSHlog#syncer(), around line 1080:
> {code}
> this.syncedTillHere = Math.max(this.syncedTillHere, doneUpto);
> {code}
> Assignment to syncedTillHere after computing max value is not protected by
> proper synchronization.
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