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https://issues.apache.org/jira/browse/HDFS-8384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14578672#comment-14578672
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Vinayakumar B commented on HDFS-8384:
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Is this improvement is to allow NNs to start with old images created before
HDFS-7587 was in?
Or in Some other cases also this situation (Lease without UC file) is possible?
> 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: Tsz Wo Nicholas Sze
> Priority: Minor
>
> 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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