[ZEPPELIN-2332] HeliumApplicationFactoryTest in Zeppelin Zengine hangs

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.8.0
• Component/s: zeppelin-zengine

Environment

Ubuntu 14.04.5
x86, ppc64le

$ java -version
openjdk version "1.8.0_111"
OpenJDK Runtime Environment (build 1.8.0_111-8u111-b14-3~14.04.1-b14)
OpenJDK 64-Bit Server VM (build 25.111-b14, mixed mode)

• Assignee: Unassigned
• Reporter: Pravin Dsilva
• Created: 30/Mar/17 10:43
• Updated: 04/Jul/18 11:41

Description

On the Master branch of Zeppelin, HeliumApplicationFactoryTest test gets hanged indefinitely at the following point:

09:51:34,664  INFO org.apache.zeppelin.interpreter.remote.RemoteInterpreter:552 - Push local angular object registry from ZeppelinServer to remote interpreter group 2CESSVJH8:shared_process
09:51:34,770 ERROR org.apache.zeppelin.interpreter.remote.RemoteInterpreterEventPoller:263 - Can't handle event RemoteInterpreterEvent(type:OUTPUT_UPDATE_ALL, data:{"messages":[],"noteId":"2CDNWC2XB","paragraphId":"20170330-095133_466661605"})
java.lang.NullPointerException
	at org.apache.zeppelin.interpreter.remote.RemoteInterpreterEventPoller.run(RemoteInterpreterEventPoller.java:194)
09:51:34,924  INFO org.apache.zeppelin.interpreter.InterpreterGroup:185 - Close interpreter group 2CESSVJH8:shared_process for session: shared_session
09:51:34,968  INFO org.apache.zeppelin.interpreter.remote.RemoteInterpreterProcess:123 - shutdown interpreter process
09:51:35,927 ERROR org.apache.zeppelin.interpreter.remote.AppendOutputRunner:68 - Wait for OutputBuffer queue interrupted: null
09:51:37,449  INFO org.apache.zeppelin.interpreter.remote.RemoteInterpreterProcess:133 - Exception in RemoteInterpreterProcess while synchronized dereference, can safely ignore exception while client.shutdown() may terminates remote process
09:51:37,473  INFO org.apache.zeppelin.interpreter.remote.RemoteInterpreterManagedProcess:186 - Interpreter process exited 0

Commands used for building:

 mvn clean install -Pspark-1.6  -Ppyspark -Phadoop-2.7 -DskipTests

For running the tests:

mvn  test -Pspark-1.6  -Ppyspark -Phadoop-2.7  -Dtest=HeliumApplicationFactoryTest

I have attached the complete console log. There isn't any surefire report generated for additional debug logs.

Issue Links

• is duplicated by: ZEPPELIN-2470 HeliumApplicationFactoryTest fails on Travis