Dibyendu Karmakar created HDFS-13811:
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Summary: RBF: Race condition between router admin quota update and
periodic quota update service
Key: HDFS-13811
URL: https://issues.apache.org/jira/browse/HDFS-13811
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Dibyendu Karmakar
Assignee: Dibyendu Karmakar
If we try to update quota of an existing mount entry and at the same time
periodic quota update service is running on the same mount entry, it is leading
the mount table to _inconsistent state._
Here transactions are:
A - Quota update service is fetching mount table entries
B - Quota update service is updating the mount table with current usage.
A' - User is trying to update quota using admin cmd.
and the transaction sequence is [ A A' B ]
quota update service is updating the mount table with old quota value.
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