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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-990) Datanode doesn't retry when write to one (full)drive fail
Date Tue, 20 Feb 2007 21:25:05 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-990?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12474569
] 

dhruba borthakur commented on HADOOP-990:
-----------------------------------------

+1. Code looks good.

One comment: I would rather dump a log message if the block returned from the namenode in
locateFollowingBlock() returns anything other than 0.


> Datanode doesn't retry when write to one (full)drive fail
> ---------------------------------------------------------
>
>                 Key: HADOOP-990
>                 URL: https://issues.apache.org/jira/browse/HADOOP-990
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>            Reporter: Koji Noguchi
>         Assigned To: Raghu Angadi
>         Attachments: HADOOP-990-1.patch, HADOOP-990-2.patch, HADOOP-990-3.patch
>
>
> When one drive is 99.9% full and datanode choose that drive to write, it fails with 
> 2007-02-07 18:16:56,574 WARN org.apache.hadoop.dfs.DataNode: DataXCeiver
> org.apache.hadoop.util.DiskChecker$DiskOutOfSpaceException: No space left on device
>  at org.apache.hadoop.dfs.DataNode$DataXceiver.writeBlock(DataNode.java:801)
>  at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:563)
>  at java.lang.Thread.run(Thread.java:595) 
> Combined with HADOOP-940, these failed blocks stay under-replicated.

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