Add failing tests to reproduce POOL-426

[rajucomp]

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See https://issues.apache.org/jira/browse/POOL-426 for more details.

[rajucomp]

@garydgregory @psteitz Requesting critical review for the fix for POOL-426. Thanks!

[garydgregory]

Hi @psteitz Any thoughts on this one?

[psteitz]

Analysis looks correct to me. This plus revert of bugged fix for POOL-425 should work. I am having trouble getting the patch applied to the right branch. Will review and merge once fully tested. Thanks for the patch.

[garydgregory]

I can cut a release candidate when we have a fix validated.