Summary

Generating a particularly large Tempo report can cause JIRA to OOME when it runs out of heap space.

Steps to Reproduce

1. On a particularly large instance with a lot of time reports over many years attempt to produce a report that spans a long time period.

Expected Results

Report is produced, or error is thrown to tell you the report time frame is too large.

Actual Results

The instance will run out of heap and stop responding or restart.

Workaround

Generate many smaller reports rather than one big one.