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ASF GitHub Bot commented on PHOENIX-6129: ----------------------------------------- ChinmaySKulkarni commented on a change in pull request #920: URL: https://github.com/apache/phoenix/pull/920#discussion_r512142414 ########## File path: phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java ########## @@ -4364,17 +4353,17 @@ public void deleteMutexCell(String tenantId, String schemaName, String tableName } } - private byte[] getSysMutexPhysicalTableNameBytes() throws IOException, SQLException { - byte[] sysMutexPhysicalTableNameBytes = null; - try(Admin admin = getAdmin()) { - if(admin.tableExists(PhoenixDatabaseMetaData.SYSTEM_MUTEX_HBASE_TABLE_NAME)) { - sysMutexPhysicalTableNameBytes = PhoenixDatabaseMetaData.SYSTEM_MUTEX_NAME_BYTES; - } else if (admin.tableExists(TableName.valueOf( - SchemaUtil.getPhysicalTableName(SYSTEM_MUTEX_NAME, props).getName()))) { - sysMutexPhysicalTableNameBytes = SchemaUtil.getPhysicalTableName(SYSTEM_MUTEX_NAME, props).getName(); + private Table getSysMutexTable() throws SQLException, IOException { + String table = SYSTEM_MUTEX_NAME; + TableName tableName = TableName.valueOf(table); + try (Admin admin = getAdmin()) { + if (!admin.tableExists(tableName)) { + table = table.replace(QueryConstants.NAME_SEPARATOR, + QueryConstants.NAMESPACE_SEPARATOR); + tableName = TableName.valueOf(table); } + return connection.getTable(tableName); Review comment: Got it. Makes sense ---------------------------------------------------------------- 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 > Optimize tableExists() call while retrieving correct MUTEX table > ---------------------------------------------------------------- > > 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)