meiyoula created SPARK-5764:
-------------------------------

             Summary: Delete the cache and lock file after executor fetching 
the jar
                 Key: SPARK-5764
                 URL: https://issues.apache.org/jira/browse/SPARK-5764
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
            Reporter: meiyoula


Every time while executor fetching a jar from httpserver, a lock file and a 
cache file will be created on the local. After fetching, this two files will be 
useless.
And when the jar package is big, the cache file also be big. it wates the disk 
space.



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