Others probably have more insight on this but at least you narrowed it down to the meta store. I've had some concurrency issues with the metastore myself (HIVE-1539) so perhaps you are running into something similar? Perhaps there are some different errors before you see this error/warning like trying to reconnect? I know mysql gave us some problems as a metastore disconnecting connections after a wait_time expired in the past.
________________________________ From: lei liu [mailto:liulei...@gmail.com] Sent: Monday, August 23, 2010 10:25 AM To: hive-user@hadoop.apache.org Subject: Re: java.sql.SQLException: org.apache.thrift.transport.TTransportException: Cannot read. Remote side has closed. Tried to read 1 bytes, but only got 0 bytes. Hi [images/cleardot.gif] [images/cleardot.gif] Bennie, Thank you for your reply I see there is below exception in hive.log : 10/08/23 14:06:23 INFO Datastore.Retrieve: Object with id "3211[OID]org.apache.hadoop.hive.metastore.model.MStorageDescriptor" not found ! 10/08/23 14:06:23 ERROR server.TThreadPoolServer: Error occurred during processing of message. java.lang.RuntimeException: org.apache.thrift.TException: org.apache.thrift.TException: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to fetch user root at org.apache.hadoop.hive.service.HiveServer$ThriftHiveProcessorFactory.getProcessor(HiveServer.java:397) at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:245) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: org.apache.thrift.TException: org.apache.thrift.TException: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to fetch user root at org.apache.hadoop.hive.service.HiveServer$HiveServerHandler.<init>(HiveServer.java:109) at org.apache.hadoop.hive.service.HiveServer$ThriftHiveProcessorFactory.getProcessor(HiveServer.java:394) ... 4 more Caused by: org.apache.thrift.TException: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to fetch user root at org.apache.hadoop.hive.service.HiveServer$HiveServerHandler.verify(HiveServer.java:369) at org.apache.hadoop.hive.service.HiveServer$HiveServerHandler.<init>(HiveServer.java:106) ... 5 more Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to fetch user root at org.apache.hadoop.hive.ql.metadata.Hive.getUser(Hive.java:363) at org.apache.hadoop.hive.service.HiveServer$HiveServerHandler.verify(HiveServer.java:365) ... 6 more Caused by: javax.jdo.JDOObjectNotFoundException: No such database row FailedObject:3211[OID]org.apache.hadoop.hive.metastore.model.MStorageDescriptor at org.datanucleus.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:308) at org.datanucleus.jdo.JDOTransaction.commit(JDOTransaction.java:132) at org.apache.hadoop.hive.metastore.ObjectStore.commitTransaction(ObjectStore.java:229) at org.apache.hadoop.hive.metastore.ObjectStore.getUser(ObjectStore.java:944) at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.get_user(HiveMetaStore.java:324) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getUser(HiveMetaStoreClient.java:318) at org.apache.hadoop.hive.ql.metadata.Hive.getUser(Hive.java:352) ... 7 more what is mean the exception? 2010/8/23 Bennie Schut <bsc...@ebuddy.com<mailto:bsc...@ebuddy.com>> The real reason is probably in the log of the hiveserver. It should be in the console you started the hiveserver in. I sometimes start it like this: nohup ./hive --service hiveserver >hive.log & Which would show you some errors in the hive.log file. We used to have some problems with PermGen issues because of a classloading/unloading issue in one of our udfs which would show itself with an error like this. It is however a pretty generic error which is telling you the "hiveserver" is probably having a problem and you need to take a look at the logs. ________________________________ From: lei liu [mailto:liulei...@gmail.com<mailto:liulei...@gmail.com>] Sent: Monday, August 23, 2010 9:48 AM To: hive-user@hadoop.apache.org<mailto:hive-user@hadoop.apache.org> Subject: Re: java.sql.SQLException: org.apache.thrift.transport.TTransportException: Cannot read. Remote side has closed. Tried to read 1 bytes, but only got 0 bytes. Yes, you are right. I do that, but after the hive server run several days, when client connection the hive server, the client receive the exception. 2010/8/23 Adarsh Sharma <adarsh.sha...@orkash.com<mailto:adarsh.sha...@orkash.com>> For Running Hive in Server Mode .. First U have to start service of hiveserver :: *$bin/hive --service hiveserver * and then run the code lei liu wrote: Hello everyone, I use JDBC to connection the hive server, sometime I receive below exception: java.sql.SQLException: org.apache.thrift.transport.TTransportException: Cannot read. Remote side has closed. Tried to read 1 bytes, but only got 0 bytes. Please tell me the eason. Thanks LiuLei
