Major Description
When HBase master is running on 1.x version and regionservers are on 2.x version (specifically system rsgroup regionservers), TaskRegionObserver fails to initiate connection to read SYSTEM.TASK records. While this task itself is not a customer facing usecase, but we should fix the task being unable to initiate connection for the first time. Once the connection is created, it is anyways cached in CQSI.
Detailed stacktrace:
ERROR [pool-54-thread-2] coprocessor.TaskRegionObserver: SelfHealingTask failed! org.apache.phoenix.exception.PhoenixIOException: org.apache.hadoop.hbase.regionserver.NoSuchColumnFamilyException: Column family table does not exist in region hbase:meta,,1.1588230740 in table 'hbase:meta', {TABLE_ATTRIBUTES => {IS_META => 'true', coprocessor$1 => '|org.apache.hadoop.hbase.coprocessor.MultiRowMutationEndpoint|536870911|'}}, {NAME => 'info', VERSIONS => '3', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', MIN_VERSIONS => '0', REPLICATION_SCOPE => '0', BLOOMFILTER => 'NONE', IN_MEMORY => 'true', COMPRESSION => 'NONE', BLOCKCACHE => 'true', BLOCKSIZE => '8192', METADATA => {'CACHE_DATA_IN_L1' => 'true'}} at org.apache.hadoop.hbase.regionserver.HRegion.checkFamily(HRegion.java:8476) at org.apache.hadoop.hbase.regionserver.HRegion.prepareGet(HRegion.java:8008) at org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2586) at org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2530) at org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:45815) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:385) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:132) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:369) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:349) at org.apache.phoenix.util.ServerUtil.parseServerException(ServerUtil.java:138) at org.apache.phoenix.query.ConnectionQueryServicesImpl.ensureTableCreated(ConnectionQueryServicesImpl.java:1542) at org.apache.phoenix.query.ConnectionQueryServicesImpl.createTable(ConnectionQueryServicesImpl.java:1936) at org.apache.phoenix.schema.MetaDataClient.createTableInternal(MetaDataClient.java:3084) at org.apache.phoenix.schema.MetaDataClient.createTable(MetaDataClient.java:1111) at org.apache.phoenix.compile.CreateTableCompiler$CreateTableMutationPlan.execute(CreateTableCompiler.java:420) at org.apache.phoenix.jdbc.PhoenixStatement$2.call(PhoenixStatement.java:415) at org.apache.phoenix.jdbc.PhoenixStatement$2.call(PhoenixStatement.java:397) at org.apache.phoenix.call.CallRunner.run(CallRunner.java:53) at org.apache.phoenix.jdbc.PhoenixStatement.executeMutation(PhoenixStatement.java:396) at org.apache.phoenix.jdbc.PhoenixStatement.executeMutation(PhoenixStatement.java:384) at org.apache.phoenix.jdbc.PhoenixStatement.executeUpdate(PhoenixStatement.java:1906) at org.apache.phoenix.query.ConnectionQueryServicesImpl$12.call(ConnectionQueryServicesImpl.java:3290) at org.apache.phoenix.query.ConnectionQueryServicesImpl$12.call(ConnectionQueryServicesImpl.java:3253) at org.apache.phoenix.util.PhoenixContextExecutor.call(PhoenixContextExecutor.java:76) at org.apache.phoenix.query.ConnectionQueryServicesImpl.init(ConnectionQueryServicesImpl.java:3253) at org.apache.phoenix.jdbc.PhoenixDriver.getConnectionQueryServices(PhoenixDriver.java:255) at org.apache.phoenix.jdbc.PhoenixEmbeddedDriver.createConnection(PhoenixEmbeddedDriver.java:144) at org.apache.phoenix.jdbc.PhoenixDriver.connect(PhoenixDriver.java:221) at java.sql.DriverManager.getConnection(DriverManager.java:664) at java.sql.DriverManager.getConnection(DriverManager.java:208) at org.apache.phoenix.util.QueryUtil.getConnection(QueryUtil.java:422) at org.apache.phoenix.util.QueryUtil.getConnectionOnServer(QueryUtil.java:400) at org.apache.phoenix.util.QueryUtil.getConnectionOnServer(QueryUtil.java:381) at org.apache.phoenix.coprocessor.TaskRegionObserver$SelfHealingTask.run(TaskRegionObserver.java:162) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)
We should support fallback for admin#tableExists for Phoenix server side dealing of CQSI#init.