Mail queue stops processing after OutOfMemoryError in Jira server

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This page describes a singular cause for Out Of Memory Heap Space Errors. Refer to JIRA Crashes Due to OutOfMemoryError Java heap space for a general discussion.


The mail queue is not processed. Flushing the queue manually works (from Administration >> Mail Queue).


The instance has hit an OutOfMemoryError.


  1. As a temporary measure, increase JIRA's Heap Space allocation.
  2. Restart the instance.
  3. For the root cause, see JIRA Crashes Due to 'OutOfMemoryError Java heap space'.
Last modified on Jun 16, 2020

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