Vinay created HDFS-4238:
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Summary: [HA] Standby namenode should not do purging of shared
storage edits.
Key: HDFS-4238
URL: https://issues.apache.org/jira/browse/HDFS-4238
Project: Hadoop HDFS
Issue Type: Bug
Components: ha
Affects Versions: 2.0.2-alpha, 3.0.0
Reporter: Vinay
This happened in our cluster,
>> Standby NN was keep doing checkpoint every one hour and uploading to Active
>> NN was continuously failing due to some kerberos issue and nobody noticed
>> this, since Active was servicing properly.
>> Active NN was up for long time with fsimage having very least transaction.
>> Standby NN has saved the checkpoint in its name dir and purged the txns >
>> 1000000 from shared storage ( includes edits which are not present in Active
>> NN's fsimage)
>> After some time Active NN is restarted and StandBy NN switched to Active.
Now current Standby not able to load any edits from shared storage, as expected
edits are not present in shared storage. Its keep running idle.
So {{editLog.purgeLogsOlderThan(purgeLogsFrom);}} always should be called from
Active NameNode.
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