[YARN-7181] CPUTimeTracker.updateElapsedJiffies can report negative usage

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-beta1
• Hadoop Flags: Reviewed
• Assignee: Miklos Szegedi
• Reporter: Miklos Szegedi
• Created: 08/Sep/17 23:46
• Updated: 11/Sep/17 20:06
• Resolved: 11/Sep/17 19:50

Description

It happens, when the process exited and elapsedJiffies becomes 0 again.

  public void updateElapsedJiffies(BigInteger elapsedJiffies, long newTime) {
    cumulativeCpuTime = elapsedJiffies.multiply(jiffyLengthInMillis);
    sampleTime = newTime;
 }