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From "Todd Lipcon (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2882) DN continues to start up, even if block pool fails to initialize
Date Wed, 04 Apr 2012 22:52:22 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2882?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Todd Lipcon updated HDFS-2882:

    Attachment: hdfs-2882.txt

attaching some preliminary work for this. Fixes several of the potential NPEs and introduces
a State enum for BPServiceActor, so as to distinguish failed from successful exit. the test
case is still in-progress (it's not yet a real regression test)
> DN continues to start up, even if block pool fails to initialize
> ----------------------------------------------------------------
>                 Key: HDFS-2882
>                 URL: https://issues.apache.org/jira/browse/HDFS-2882
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 0.24.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-2882.txt
> I started a DN on a machine that was completely out of space on one of its drives. I
saw the following:
> 2012-02-02 09:56:50,499 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization
failed for block pool Block pool BP-448349972- (storage id DS-507718931-
> 42002148) service to styx01.sf.cloudera.com/
> java.io.IOException: Mkdirs failed to create /data/1/scratch/todd/styx-datadir/current/BP-448349972-
>         at org.apache.hadoop.hdfs.server.datanode.FSDataset$BlockPoolSlice.<init>(FSDataset.java:335)
> but the DN continued to run, spewing NPEs when it tried to do block reports, etc. This
was on the HDFS-1623 branch but may affect trunk as well.

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