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https://issues.apache.org/jira/browse/HDFS-4867?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Plamen Jeliazkov updated HDFS-4867:
-----------------------------------
Attachment: HDFS-4867.trunk.patch
Attaching patch with unit test to print orphaned blocks from metaSave. This
will fix the immediate issue but I struggle to understand WHY this is happening
in the first place...
I am able to simulate orphaned blocks in the unit test by deleting the created
file immediately before metaSave is called.
> metaSave NPEs when there are invalid blocks in repl queue.
> ----------------------------------------------------------
>
> Key: HDFS-4867
> URL: https://issues.apache.org/jira/browse/HDFS-4867
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 0.23.7, 2.0.4-alpha
> Reporter: Kihwal Lee
> Assignee: Ravi Prakash
> Attachments: HDFS-4867.trunk.patch
>
>
> Since metaSave cannot get the inode holding a orphaned/invalid block, it NPEs
> and stops generating further report. Normally ReplicationMonitor removes them
> quickly, but if the queue is huge, it takes very long time. Also in safe
> mode, they stay.
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