[YARN-402] Dispatcher warn message is too late

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Lohit Vijaya Renu
• Created: 14/Feb/13 00:00
• Updated: 25/Oct/19 20:27

Description

AsyncDispatcher throws out Warn when capacity remaining is less than 1000

if (remCapacity < 1000) {
        LOG.warn("Very low remaining capacity in the event-queue: "
            + remCapacity);
      }

What would be useful is to warn much before that, may be half full instead of when queue is completely full. I see that eventQueue capacity is int value. So, if one warn's queue has only 1000 capacity left, then service definitely has serious problem.