Duo Zhang created HBASE-17251:
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Summary: Add a timeout parameter when locating region
Key: HBASE-17251
URL: https://issues.apache.org/jira/browse/HBASE-17251
Project: HBase
Issue Type: Sub-task
Components: asyncclient, Client
Affects Versions: 2.0.0
Reporter: Duo Zhang
Fix For: 2.0.0
Now we always use the default timeout configured for zk and meta.
I think it is reasonable to always use the same timeout when accessing zk and
meta as the result will be shared by lots of threads. If we could do a
successful fetching then the result will be in cache so it does not make sense
to set the timeout to a very small value when fetching.
But I think it is also important to let the user request finish in time even if
the user can only get a timeout exception. We should not block a user request
longer than operation timeout.
So I think we could add a timeout parameter to the region locate method, and if
the location can not be fetched in time, we will just finished the returned
CompletableFuture with a timeout exception, but the actual fetching operation
can still go on and use its own timeout config.
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