错误：
java.lang.NoClassDefFoundError: org/apache/tez/dag/api/TezConfiguration
at org.apache.hadoop.hive.ql.exec.tez.TezSessionPoolSession$AbstractTriggerValidator.startTriggerValidator(TezSessionPoolSession.java:74)
at org.apache.hadoop.hive.ql.exec.tez.TezSessionPoolManager.initTriggers(TezSessionPoolManager.java:207)
at org.apache.hadoop.hive.ql.exec.tez.TezSessionPoolManager.startPool(TezSessionPoolManager.java:114)
at org.apache.hive.service.server.HiveServer2.initAndStartTezSessionPoolManager(HiveServer2.java:839)
at org.apache.hive.service.server.HiveServer2.startOrReconnectTezSessions(HiveServer2.java:822)
at org.apache.hive.service.server.HiveServer2.start(HiveServer2.java:745)
at org.apache.hive.service.server.HiveServer2.startHiveServer2(HiveServer2.java:1037)
at org.apache.hive.service.server.HiveServer2.access$1600(HiveServer2.java:140)
at org.apache.hive.service.server.HiveServer2$StartOptionExecutor.execute(HiveServer2.java:1305)
at org.apache.hive.service.server.HiveServer2.main(HiveServer2.java:1149)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.util.RunJar.run(RunJar.java:323)
at org.apache.hadoop.util.RunJar.main(RunJar.java:236)
Caused by: java.lang.ClassNotFoundException: org.apache.tez.dag.api.TezConfiguration
at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
... 16 more
修改hive-site.xml
加上这个(如果有就修改，没有就添加）
<!-- hiveserver2的高可用参数，开启此参数可以提高hiveserver2的启动速度 -->
<property>
<name>hive.server2.active.passive.ha.enable</name>
<value>true</value>
</property>
再次启动hiveserver2
