GitHub user voyageth opened a pull request:
https://github.com/apache/zeppelin/pull/1144
add try-catch in close() method.
### What is this PR for?
Fix bug on JdbcInterpreter when hive server restarted.
each connection.close() should be wraped by try-catch.
### What type of PR is it?
Bug Fix
### What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-1128
### How should this be tested?
Restart hive while zeppelin still alive.
After that, Zeppelin notebook's hive query execution will be fail

Stacktrace is like this.
It was HiveInterpreter because i use zeppelin by yum install on centos(some
old version).
But JdbcInterpreter & HiveInterpreter's close() method is same.
> ERROR [2016-07-07 18:23:46,676] ({pool-1-thread-2}
HiveInterpreter.java[close]:166) - Error while closing...
java.sql.SQLException: Error while cleaning up the server resources
at
org.apache.hive.jdbc.HiveConnection.close(HiveConnection.java:721)
at
org.apache.zeppelin.hive.HiveInterpreter.close(HiveInterpreter.java:151)
at
org.apache.zeppelin.interpreter.ClassloaderInterpreter.close(ClassloaderInterpreter.java:88)
at
org.apache.zeppelin.interpreter.LazyOpenInterpreter.close(LazyOpenInterpreter.java:78)
at
org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer.close(RemoteInterpreterServer.java:232)
at
org.apache.zeppelin.interpreter.thrift.RemoteInterpreterService$Processor$close.getResult(RemoteInterpreterService.java:1432)
at
org.apache.zeppelin.interpreter.thrift.RemoteInterpreterService$Processor$close.getResult(RemoteInterpreterService.java:1417)
at
org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
at
org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:285)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.thrift.transport.TTransportException:
java.net.SocketException: Broken pipe
at
org.apache.thrift.transport.TIOStreamTransport.flush(TIOStreamTransport.java:161)
at
org.apache.thrift.transport.TSaslTransport.flush(TSaslTransport.java:501)
at
org.apache.thrift.transport.TSaslClientTransport.flush(TSaslClientTransport.java:37)
at org.apache.thrift.TServiceClient.sendBase(TServiceClient.java:65)
at
org.apache.hive.service.cli.thrift.TCLIService$Client.send_CloseSession(TCLIService.java:177)
at
org.apache.hive.service.cli.thrift.TCLIService$Client.CloseSession(TCLIService.java:169)
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:497)
at
org.apache.hive.jdbc.HiveConnection$SynchronizedHandler.invoke(HiveConnection.java:1380)
at com.sun.proxy.$Proxy0.CloseSession(Unknown Source)
at
org.apache.hive.jdbc.HiveConnection.close(HiveConnection.java:719)
... 12 more
Caused by: java.net.SocketException: Broken pipe
at java.net.SocketOutputStream.socketWrite0(Native Method)
at
java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109)
at java.net.SocketOutputStream.write(SocketOutputStream.java:153)
at
java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
at
org.apache.thrift.transport.TIOStreamTransport.flush(TIOStreamTransport.java:159)
... 24 more
### Screenshots (if appropriate)

You can merge this pull request into a Git repository by running:
$ git pull https://github.com/voyageth/zeppelin patch-2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/zeppelin/pull/1144.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1144
----
commit b3d0ef61cb0588c17b629facc927bb31d624513f
Author: SungjuKwon <[email protected]>
Date: 2016-07-07T10:04:06Z
add try-catch in close() method.
each connection.close() should be wraped by try-catch.
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