tez shuffle 处理程序设置后失败：Map 操作员初始化失败

Question

After Setup for the Tez Shuffle Handler following instructions on: https://tez.apache.org/shuffle-handler.html I'm getting below error in query execution:

Vertex failed, vertexName=Map 2, vertexId=vertex_1608273679503_0002_2_01, diagnostics=[Task failed, taskId=task_1608273679503_0002_2_01_000000, diagnostics=[TaskAttempt 0 failed, info=[Error: Error while running task ( failure ): attempt_1608273679503_0002_2_01_000000_0:java.lang.RuntimeException: java.lang.RuntimeException: Map operator initialization failed at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:296) at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.run(TezProcessor.java:250) at org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.Z93F725A07423FE1C88 9F448B33D21F46Z:374) at org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:73) at org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:61) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1729) at org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:61) at org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:37) at org.ZB6EFD606D118D0F62066E31419FF04C CZ.tez.common.CallableWithNdc.call(CallableWithNdc.java:36) at org.apache.hadoop.hive.llap.daemon.impl.StatsRecordingThreadPool$WrappedCallable.call(StatsRecordingThreadPool.java:110) at java.util.concurrent.FutureTask.run(FutureTask.java:266) 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) Caused by: java.lang.RuntimeException: Map operator initialization failed at org.ZB6EFD606D118D0F62066 E31419FF04CCZ.hadoop.hive.ql.exec.tez.MapRecordProcessor.init(MapRecordProcessor.java:363) at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:266)... 15 more Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Async Initialization failed. abortRequested=false at org.apache.hadoop.hive.ql.exec.Operator.completeInitialization(Operator.java:461) at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:395) at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:568) at org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:520) at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:381) at org.ZB6EFD6 06D118D0F62066E31419FF04CCZ.hadoop.hive.ql.exec.tez.MapRecordProcessor.init(MapRecordProcessor.java:335)... 16 more Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.NullPointerException at org.apache.hadoop.hive.ql.exec.tez.LlapObjectCache.retrieve(LlapObjectCache.java:118) at org.apache.hadoop.hive.ql.exec.tez.LlapObjectCache$1.call(LlapObjectCache.java:143)... 4 more Caused by: org.ZB6EFD606D118D0F620 66E31419FF04CCZ.hadoop.hive.ql.metadata.HiveException: java.lang.NullPointerException at org.apache.hadoop.hive.ql.exec.vector.mapjoin.fast.VectorMapJoinFastHashTableLoader.load(VectorMapJoinFastHashTableLoader.java:113) at org.apache.hadoop.hive.ql.exec.MapJoinOperator.loadHashTableInternal(MapJoinOperator.java:331) at org.apache.hadoop.hive.ql.exec.MapJoinOperator.loadHashTable(MapJoinOperator.java:400) at org.apache.hadoop.hive.ql.exec.MapJoinOperator.lambda$initializeOp $0(MapJoinOperator.java:207) at org.apache.hadoop.hive.ql.exec.tez.LlapObjectCache.retrieve(LlapObjectCache.java:116)... 5 more Caused by: java.lang.NullPointerException at org.apache.tez.runtime.api.impl.TezTaskContextImpl.getServiceConsumerMetaData(TezTaskContextImpl.java:190) at org.apache.tez.runtime.library.common.shuffle.impl.ShuffleManager.(ShuffleManager.java:264) at org.apache.tez.runtime.library.input.UnorderedKVInput.start(UnorderedKVInput.java:146) at org.apache.hadoop.hive.ql.exec.vector.mapjoin.fast.VectorMapJoinF astHashTableLoader.load(VectorMapJoinFastHashTableLoader.java:109)... 9 more

Can anyone help here please?

Answer 1

LLAP internally uses MAP-REDUCE shuffle handler because inside TEZ code we have a hard-coded constant TEZ_SHUFFLE_HANDLER_SERVICE_ID = "mapreduce_shuffle". https://github.com/apache/tez/blob/master/tez-api/src/main/java/org/apache/tez/dag/api/TezConstants.java

So, when we are using tez_shuffle with LLAP its giving 'NullpointerException'.