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From "Wang Xu (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5729) FSEditLog.open should stop going on if cannot open any directory
Date Sat, 25 Apr 2009 01:06:30 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12702637#action_12702637
] 

Wang Xu commented on HADOOP-5729:
---------------------------------

> > AFAIK processIOError() intends to deal with errors of editStreams and remove bad
ones
> 
> Correct. And also shutdown the node if there are no streams remained.
> It does it in the first line.

Thus we should call processIOError() with a trivial argument at the end of open() if no editStream
is opened correctly. is this OK?

> FSEditLog.open should stop going on if cannot open any directory
> ----------------------------------------------------------------
>
>                 Key: HADOOP-5729
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5729
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.19.1
>         Environment: CentOS 5.2, jdk 1.6, hadoop 0.19.1
>            Reporter: Wang Xu
>            Assignee: Wang Xu
>             Fix For: 0.19.2
>
>         Attachments: fseditlog-open.patch
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> FSEditLog.open will be invoked when SecondaryNameNode doCheckPoint,
> If no dir is opened successfully, it only prints some WARN messages in log,
> and goes on running. 
> However, it causes the editStreams becomes empty and cannot by synced 
> in. And if editStreams were decreased to 0 when exceptions occured during
> logsync, NameNode would print FATAL log message and halt itself. Hence,
> we think it should also stopped itself at that time.

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