MapR 5.0 Documentation : Troubleshooting Hive

 This page includes Hive troubleshooting tips related to the following components:

HBase

If you see a similar error message to the following, ensure that hbase.zookeeper.quorum and hbase.zookeeper.property.clientPort are properly defined in the $HIVE_HOME/conf/hive-site.xml file. 

Failed with exception java.io.IOException:org.apache.hadoop.hbase.ZooKeeperConnectionException:
HBase is able to connect to ZooKeeper but the connection closes immediately. This could be a
sign that the server has too many connections (30 is the default). Consider inspecting your
ZK server logs for that error and then make sure you are reusing HBaseConfiguration as often as
you can. See HTable's javadoc for more information.

WebHCat

Secure WebHCat operations depend on the Hive metastore having Kerberos enabled. If Kerberos is not enabled for the Hive metastore, null pointer exceptions similar to the following will appear: 

2013-10-06 20:38:55,198 ERROR metastore.RetryingHMSHandler (RetryingHMSHandler.java:invoke(134)) - MetaException(message:java.lang.NullPointerException)
       at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.get_delegation_token(HiveMetaStore.java:3972)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:597)
       at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:102)
       at com.sun.proxy.$Proxy5.get_delegation_token(Unknown Source)
       at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$get_delegation_token.getResult(ThriftHiveMetastore.java:8063)
       at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$get_delegation_token.getResult(ThriftHiveMetastore.java:8047)
       at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
       at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
       at org.apache.hadoop.hive.metastore.TSetIpAddressProcessor.process(TSetIpAddressProcessor.java:48)
       at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:206)
       at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)