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https://issues.apache.org/jira/browse/HDFS-13212?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16387468#comment-16387468
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Weiwei Wu commented on HDFS-13212:
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MountTableResolver will add a locationCache with null sourcePath, this will
cause a null pointer exception when invalidateLocationCache try to remove it.
Add some code to fix this bug.
> RBF: Fix router location cache issue
> ------------------------------------
>
> Key: HDFS-13212
> URL: https://issues.apache.org/jira/browse/HDFS-13212
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: federation, hdfs
> Reporter: Weiwei Wu
> Priority: Major
> Attachments: HDFS-13212-001.patch, HDFS-13212-002.patch,
> HDFS-13212-003.patch
>
>
> The MountTableResolver refreshEntries function have a bug when add a new
> mount table entry which already have location cache. The old location cache
> will never be invalid until this mount point change again.
> Need to invalid the location cache when add the mount table entries.
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