Avoid trying to kill a node twice to prevent orphaned processes. #1232
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Some tests terminate some nodes but not all. The
atexit
routine intended to be the final catchall for cleaning up a cluster would fail to terminate all nodes if it tried to terminate a node which had been shut down viainterruptAndVerifyExitStatus
first. Tolerate terminated nodes and if the globalDebug
flag is set, log double kills. (The log message should be converted to a customTRACE
level when the code is converted to the Pythonlogging
module.)