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The "HowToUseJCarder" page has been changed by ToddLipcon. http://wiki.apache.org/hadoop/HowToUseJCarder?action=diff&rev1=2&rev2=3 -------------------------------------------------- = Interpreting the Output = In the output, each circle represents a particular object seen while the process was running. Arrows between them represent lock orders seen. An arrow leading from circle A to circle B indicates that some thread locked A before B. For example, in the following diagram, we note that many threads locked FairScheduler before JobInProgress, but one thread was seen to lock JobInProgress before FairScheduler (thus presenting a deadlock). The text next to the arrow indicates the particular functions that took the two locks. - {{http://imagebin.ca/img/%33%39%32gzi.png}} + {{attachment:cycle.png}} = Running JCarder on unit tests = One can also run JCarder on all of the Hadoop unit tests. This has caught a number of bugs in the past. To do so, follow something like the following script:
