异常message:There is no database named cloudera_manager_metastore_canary...

NoSuchObjectException(message:There is no database named cloudera_manager_metastore_canary_test_db_hive_hivemetastore_df61080e04cd7eb36c4336f71b5a8bc4)
	at org.apache.hadoop.hive.metastore.ObjectStore.getMDatabase(ObjectStore.java:495)
	at org.apache.hadoop.hive.metastore.ObjectStore.getDatabase(ObjectStore.java:506)
	at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:108)
	at com.sun.proxy.$Proxy0.getDatabase(Unknown Source)
	at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.get_database(HiveMetaStore.java:805)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:106)
	at com.sun.proxy.$Proxy5.get_database(Unknown Source)
	at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$get_database.getResult(ThriftHiveMetastore.java:7696)
	at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$get_database.getResult(ThriftHiveMetastore.java:7680)
	at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
	at org.apache.hadoop.hive.metastore.TUGIBasedProcessor$1.run(TUGIBasedProcessor.java:110)
	at org.apache.hadoop.hive.metastore.TUGIBasedProcessor$1.run(TUGIBasedProcessor.java:107)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1642)
	at org.apache.hadoop.hive.shims.HadoopShimsSecure.doAs(HadoopShimsSecure.java:502)
	at org.apache.hadoop.hive.metastore.TUGIBasedProcessor.process(TUGIBasedProcessor.java:118)
	at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:244)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

原因：

   cloudera manager 有一个对hive的健康检查叫 Hive Metastore Canary Health Test

   引用资料：

   There is a known bug with the hive canary that may cause it to fail constantly - the client-configs we are using to connect to the hive metastore are partial. This may be the root cause of this failure. Do you have security enabled on the cluster? Did you change the hadoop.rpc.protection configuration option? A fix is going to be available very soon with the next release of cloudera manager (5.1,5.2,5.3) and hopefully it will solve the problem. In the meantime you can disable the hive metastore canary.

  禁用 hive metastore canary.

      CM GUI --> Hive --> Configuration --> search for"metastore_canary_health_enabled" and uncheck(disabled). Save the setting and restart Hue,Oozie and Hive.

参考：https://groups.google.com/a/cloudera.org/forum/#!topic/scm-users/Ldt_GghQ7Rw