ERROR : FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.tez.TezTask. Vertex failed, vertexName=Reducer 2, vertexId=vertex_1582200549031_0142_2_02, diagnostics=[Task failed, taskId=task_1582200549031_0142_2_02_000008, diagnostics=[TaskAttempt 0 failed, info=[Error: Error while running task ( failure ) : java.lang.OutOfMemoryError: Java heap space
解決方法:
1、調大hive.tez.container.size的值，如hive.tez.container.size=20480MB ，hive.tez.java.opts=-Xmx16384m;（hive.tez.container.size的80%）
或者
（可選）tez.runtime.shuffle.memory.limit.percent 改小一點，默認是0.25 ， 如改爲0.15