Hi,
When trying to perform the jql query "fixVersion in unreleasedVersions()" on one of our Jira instances we get a ClauseTooComplexSearchException. The error message simply says "the following query was too complex to generate a query from: fixVersion in unreleasedVersions()". Running the search "fixVersion in releasedVersions()" however, works without any problems.
Also the search, "fixVersion in unreleasedVersions()", runs without any problems on our other nearly identically configured instances.
Any ideas?