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ASF GitHub Bot commented on PHOENIX-6129: ----------------------------------------- richardantal commented on a change in pull request #920: URL: https://github.com/apache/phoenix/pull/920#discussion_r504750907 ########## File path: phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java ########## @@ -4294,11 +4295,9 @@ public boolean acquireUpgradeMutex(long currentServerSideTableTimestamp) public boolean writeMutexCell(String tenantId, String schemaName, String tableName, String columnName, String familyName) throws SQLException { try { - byte[] rowKey = - columnName != null - ? SchemaUtil.getColumnKey(tenantId, schemaName, tableName, columnName, - familyName) - : SchemaUtil.getTableKey(tenantId, schemaName, tableName); + byte[] rowKey = columnName != null ? + SchemaUtil.getColumnKey(tenantId, schemaName, tableName, columnName, familyName) : + SchemaUtil.getTableKey(tenantId, schemaName, tableName); // at this point the system mutex table should have been created or // an exception thrown byte[] sysMutexPhysicalTableNameBytes = getSysMutexPhysicalTableNameBytes(); Review comment: `byte[] sysMutexPhysicalTableNameBytes = getSysMutexPhysicalTableNameBytes();` If I understand correctly what @ChinmaySKulkarni described in the ticket, this call will still result to an admin.tableExists call to check the existance of SYSTEM.MUTEX/SYSTEM:MUTEX and you didn't changed that. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org > 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: 5.0.0, 4.15.0 > Reporter: Chinmay Kulkarni > Assignee: Viraj Jasani > Priority: Major > Labels: phoenix-hardening, quality-improvement > 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. -- This message was sent by Atlassian Jira (v8.3.4#803005)