After an upgrade to version 1.546 Jenkins became very unstable crashing 2-4 times per day. From what I can tell it is because of missing junitResult.xml files when jenkins tries to load the test trend.

Attached is a snippet from the log where you can see the FileNotFoundException for the junitResult.xml file followed by a StackOverFlow error and then an out of memory error.

Also attached is a screen shot from a heap analysis showing that the request handler thread building the test trend is holding a considerable amount of the heap. Please note that this particular heap analysis is from a different crash than the log snippet. I did not analyze the heap on the crash shown in the log, but I am sure it would show the test trend for the same job that throw the StackOverFlow.