[jira] [Created] (PHOENIX-6129) Remove unnecessary HBase Admin API calls when writing and deleting mutex cells

["Chinmay Kulkarni (Jira)" <ji...@apache.org>]

Chinmay Kulkarni created PHOENIX-6129:
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             Summary: Remove unnecessary HBase Admin API calls when writing and deleting mutex cells
                 Key: PHOENIX-6129
                 URL: https://issues.apache.org/jira/browse/PHOENIX-6129
             Project: Phoenix
          Issue Type: Improvement
    Affects Versions: 4.15.0, 5.0.0
            Reporter: Chinmay Kulkarni
             Fix For: 5.1.0, 4.16.0


Inside CQSI.writeMutexCell(), we call [getSysMutexPhysicalTableNameBytes()|https://github.com/apache/phoenix/blob/e3c7b4bdce2524eb4fd1e7eb0ccd3454fcca81ce/phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java#L4244] which in turn calls HBase Admin APIs to check the existence of SYSTEM.MUTEX/SYSTEM:MUTEX [here|https://github.com/apache/phoenix/blob/e3c7b4bdce2524eb4fd1e7eb0ccd3454fcca81ce/phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java#L4309-L4312].

Later, we anyways try to get the HTable both inside [writeMutexCell()|https://github.com/apache/phoenix/blob/e3c7b4bdce2524eb4fd1e7eb0ccd3454fcca81ce/phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java#L4245] and [deleteMutexCell()|https://github.com/apache/phoenix/blob/e3c7b4bdce2524eb4fd1e7eb0ccd3454fcca81ce/phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java#L4289]. Instead, we can lazily fail this getTable() call (by catching the HBase TableNotFoundException) to avoid additional HBase Admin API calls.



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