[jira] [Created] (SPARK-4759) Deadlock in pathological spark job.

["Davis Shepherd (JIRA)" <ji...@apache.org>]

Davis Shepherd created SPARK-4759:
-------------------------------------

             Summary: Deadlock in pathological spark job.
                 Key: SPARK-4759
                 URL: https://issues.apache.org/jira/browse/SPARK-4759
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
    Affects Versions: 1.1.1
         Environment: Java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)

Mac OSX 10.10.1
Using local spark context
            Reporter: Davis Shepherd


The attached test class runs two identical jobs that perform some iterative computation on and RDD[Int, Int]. This computation involves 
  taking new data merging it with the previous result
  caching and checkpointing the new result
  rinse and repeat

The first time the job is run, it runs successfully, and the spark context is shut down. The second time the job is run with a new spark context in the same process, the job hangs indefinitely, only having scheduled a subset of the necessary tasks for the final stage.

Ive been able to produce a test case that reproduces the issue, and I've added some comments where some knockout experimentation has left some breadcrumbs as to where the issue might be.  




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