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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Trivial Update of "HowToUseJCarder" by ToddLipcon
Date Wed, 17 Feb 2010 07:38:31 GMT
Dear Wiki user,

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The "HowToUseJCarder" page has been changed by ToddLipcon.


  = 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:

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