[YARN-6805] NPE in LinuxContainerExecutor due to null PrivilegedOperationException exit code

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.8.1
• Fix Version/s: 2.9.0, 3.0.0-beta1, 2.8.2
• Component/s: nodemanager
• Target Version/s: 2.8.2
• Hadoop Flags: Reviewed
• Assignee: Jason Darrell Lowe
• Reporter: Jason Darrell Lowe
• Created: 11/Jul/17 22:36
• Updated: 13/Jul/17 23:13
• Resolved: 13/Jul/17 23:02

Description

The LinuxContainerExecutor contains a number of code snippets like this:

    } catch (PrivilegedOperationException e) {
      int exitCode = e.getExitCode();

PrivilegedOperationException#getExitCode can return null if the operation was interrupted, so when the JVM does auto-unboxing on that last line it can NPE if there was no exit code.