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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HBASE-13811) Splitting WALs, we are filtering out too many edits -> DATALOSS
Date Wed, 03 Jun 2015 03:03:50 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14570198#comment-14570198
] 

Duo Zhang edited comment on HBASE-13811 at 6/3/15 3:02 AM:
-----------------------------------------------------------

Write a testcase. It fails for me with
{noformat}
java.lang.AssertionError: actual array was null
	at org.apache.hadoop.hbase.regionserver.TestSplitWalDataLoss.test(TestSplitWalDataLoss.java:153)
{noformat}

I think the fix should also be applied to branch-1.1 since it will cause data loss even if
we turn off flush per CF(but no issues if you turn on DLR...). [~ndimiduk]


was (Author: apache9):
Write a testcase. It fails for me with
{noformat}
java.lang.AssertionError: actual array was null
	at org.apache.hadoop.hbase.regionserver.TestSplitWalDataLoss.test(TestSplitWalDataLoss.java:153)
{noformat}

I think the fix should also be applied to branch-1.1 since it will cause data loss even if
we turn off flush per CF. [~ndimiduk]

> Splitting WALs, we are filtering out too many edits -> DATALOSS
> ---------------------------------------------------------------
>
>                 Key: HBASE-13811
>                 URL: https://issues.apache.org/jira/browse/HBASE-13811
>             Project: HBase
>          Issue Type: Bug
>          Components: wal
>    Affects Versions: 2.0.0, 1.2.0
>            Reporter: stack
>            Assignee: stack
>            Priority: Critical
>             Fix For: 2.0.0, 1.2.0
>
>         Attachments: 13811.branch-1.txt, 13811.txt, HBASE-13811.testcase.patch
>
>
> I've been running ITBLLs against branch-1 around HBASE-13616 (move of ServerShutdownHandler
to pv2). I have come across an instance of dataloss. My patch for HBASE-13616 was in place
so can only think it the cause (but cannot see how). When we split the logs, we are skipping
legit edits. Digging.



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