Running suites.All with IBM 1.5 on 10.5.0.0 alpha - (743198) I got a hang in the test run. The last test to run successfully was xtestNestedSavepoints, but I am not sure exactly what test caused the hang. I took a thread dump which I will attach, which showed network server up and running but no ClientThread and a ping attempt blocked.
This hang is very similar to the hang that was seen after the fix attempts for
DERBY-1465 but that change was backed out so it is not related to that change. It could be that the change for DERBY-1465 just made this highly intermittent problem more likely.