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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-8384) Allow NN to startup if there are files having a lease but are not under construction
Date Tue, 08 Sep 2015 17:55:47 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8384?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jing Zhao updated HDFS-8384:
----------------------------
    Target Version/s:   (was: 2.6.1, 2.7.2)

> Allow NN to startup if there are files having a lease but are not under construction
> ------------------------------------------------------------------------------------
>
>                 Key: HDFS-8384
>                 URL: https://issues.apache.org/jira/browse/HDFS-8384
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Jing Zhao
>            Priority: Minor
>             Fix For: 2.8.0, 2.7.2
>
>         Attachments: HDFS-8384-branch-2.6.patch, HDFS-8384-branch-2.7.patch, HDFS-8384.000.patch
>
>
> When there are files having a lease but are not under construction, NN will fail to start
up with
> {code}
> 15/05/12 00:36:31 ERROR namenode.FSImage: Unable to save image for /hadoop/hdfs/namenode
> java.lang.IllegalStateException
>         at com.google.common.base.Preconditions.checkState(Preconditions.java:129)
>         at org.apache.hadoop.hdfs.server.namenode.LeaseManager.getINodesUnderConstruction(LeaseManager.java:412)
>         at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getFilesUnderConstruction(FSNamesystem.java:7124)
>         ...
> {code}
> The actually problem is that the image could be corrupted by bugs like HDFS-7587.  We
should have an option/conf to allow NN to start up so that the problematic files could possibly
be deleted.



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