[TAJO-2100] Add missing cancellation in defaultTaskScheduler when a worker is no respond

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.11.0
• Fix Version/s: 0.12.0, 0.11.2
• Component/s: QueryMaster
• Assignee: Jinho Kim
• Reporter: Jinho Kim
• Created: 17/Mar/16 09:38
• Updated: 18/Mar/16 04:27
• Resolved: 18/Mar/16 02:30

Description

if a worker is not respond, requested task should be canceled

2016-03-17 11:53:36,270 INFO org.apache.tajo.querymaster.DefaultTaskScheduler: [eb_1458117238659_0223_000002] Assigned Local/Rack/Total: (0/1/1), Attempted Cancel/Assign/Total: (0/1/1), Locality: 0.00%, Rack host: host03
2016-03-17 11:53:36,352 ERROR org.apache.tajo.rpc.NettyClientBase: Exception [org.apache.tajo.ipc.TajoWorkerProtocol(xx.xxx.xxx.xxx:28091)]: 
2016-03-17 11:53:36,352 ERROR org.apache.tajo.querymaster.DefaultTaskScheduler: java.util.concurrent.ExecutionException: com.google.protobuf.ServiceException: