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From "Robert Joseph Evans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3626) Creating file with invalid path can corrupt edit log
Date Wed, 18 Jul 2012 18:23:34 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13417343#comment-13417343
] 

Robert Joseph Evans commented on HDFS-3626:
-------------------------------------------

This is especially true with ViewFs.  A symbolic link for one client could point to a totally
different file/directory for another client.
                
> Creating file with invalid path can corrupt edit log
> ----------------------------------------------------
>
>                 Key: HDFS-3626
>                 URL: https://issues.apache.org/jira/browse/HDFS-3626
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 2.0.0-alpha
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Blocker
>         Attachments: hdfs-3626.txt, hdfs-3626.txt
>
>
> Joris Bontje reports the following:
> The following command results in a corrupt NN editlog (note the double slash and reading
from stdin):
> $ cat /usr/share/dict/words | hadoop fs -put - hdfs://localhost:8020//path/file
> After this, restarting the namenode will result into the following fatal exception:
> {code}
> 2012-07-10 06:29:19,910 INFO org.apache.hadoop.hdfs.server.namenode.FSImage: Reading
/var/lib/hadoop-hdfs/cache/hdfs/dfs/name/current/edits_0000000000000000173-0000000000000000188
expecting start txid #173
> 2012-07-10 06:29:19,912 ERROR org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader:
Encountered exception on operation MkdirOp [length=0, path=/, timestamp=1341915658216, permissions=cloudera:supergroup:rwxr-xr-x,
opCode=OP_MKDIR, txid=182]
> java.lang.ArrayIndexOutOfBoundsException: -1
> {code}

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