[jira] [Created] (HDFS-8384) Allow NN to startup if there are files having a lease but are not under construction

["Tsz Wo Nicholas Sze (JIRA)" <ji...@apache.org>]

Tsz Wo Nicholas Sze created HDFS-8384:
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             Summary: 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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