[MAPREDUCE-6160] Potential NullPointerException in MRClientProtocol interface implementation.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.7.0
• Hadoop Flags: Reviewed
• Assignee: Rohith Sharma K S
• Reporter: Rohith Sharma K S
• Created: 12/Nov/14 09:37
• Updated: 24/Apr/15 23:15
• Resolved: 01/Dec/14 22:41

Description

In the implementation of MRClientProtocol, many methods can throw NullPointerExceptions. Instead of NullPointerExceptions, better to throw IOException with proper message.

In the HistoryClientService class and MRClientService class has #verifyAndGetJob() method that return job object as null.

getTaskReport(GetTaskReportRequest request) throws IOException;
getTaskAttemptReport(GetTaskAttemptReportRequest request) throws IOException;
getCounters(GetCountersRequest request) throws IOException;
getTaskAttemptCompletionEvents(GetTaskAttemptCompletionEventsRequest request) throws IOException;
getTaskReports(GetTaskReportsRequest request) throws IOException;
getDiagnostics(GetDiagnosticsRequest request) throws IOException;