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Posted to issues@hbase.apache.org by "Rushabh Shah (Jira)" <ji...@apache.org> on 2020/08/26 21:10:00 UTC

[jira] [Created] (HBASE-24956) ConnectionManager#userRegionLock waits for lock indefinitely.

Rushabh Shah created HBASE-24956:
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             Summary: ConnectionManager#userRegionLock waits for lock indefinitely.
                 Key: HBASE-24956
                 URL: https://issues.apache.org/jira/browse/HBASE-24956
             Project: HBase
          Issue Type: Bug
          Components: Client
    Affects Versions: 1.3.2
            Reporter: Rushabh Shah
            Assignee: Rushabh Shah


One of our customers experienced high latencies (in order of 3-4 minutes) for point lookup query (We use phoenix on top of hbase).

We have different threads sharing the same hconnection.  Looks like multiple threads are stuck at the same place. [https://github.com/apache/hbase/blob/branch-1.3/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionManager.java#L1282] 

We have set the following configuration parameters to ensure query fails with a reasonable SLAs:

1. hbase.client.meta.operation.timeout

2. hbase.client.operation.timeout

3. hbase.client.scanner.timeout.period

But since  userRegionLock can wait for lock indefinitely the call will not fail within SLA.



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