Xiaoyu Yao created HDDS-1291:
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Summary: Set OmKeyArgs#refreshPipeline flag properly when client
reads a stale pipeline
Key: HDDS-1291
URL: https://issues.apache.org/jira/browse/HDDS-1291
Project: Hadoop Distributed Data Store
Issue Type: Bug
Reporter: Xiaoyu Yao
Assignee: Xiaoyu Yao
After HDDS-1138, the OM client will not talk to SCM directly to fetch the
pipeline info. Instead the pipeline info is returned as part of the keyLocation
cached by OM.
In case SCM pipeline is changed such as closed, the client may get invalid
pipeline exception. In this case, the client need to getKeyLocation with
OmKeyArgs#refreshPipeline = true to force OM update its pipeline cache for this
key.
An optimization could be queue a background task to update all the keyLocations
that is affected when OM does a refreshPipeline. (This part can be done in 0.5)
{code:java}
oldpipeline->newpipeline{code}
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