Josh Rosen created SPARK-4194:
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Summary: Exceptions thrown during SparkContext or SparkEnv
construction might lead to resource leaks or corrupted global state
Key: SPARK-4194
URL: https://issues.apache.org/jira/browse/SPARK-4194
Project: Spark
Issue Type: Bug
Components: Spark Core
Reporter: Josh Rosen
Priority: Critical
The SparkContext and SparkEnv constructors instantiate a bunch of objects that
may need to be cleaned up after they're no longer needed. If an exception is
thrown during SparkContext or SparkEnv construction (e.g. due to a bad
configuration setting), then objects created earlier in the constructor may not
be properly cleaned up.
This is unlikely to cause problems for batch jobs submitted through
{{spark-submit}}, since failure to construct SparkContext will probably cause
the JVM to exit, but it is a potentially serious issue in interactive
environments where a user might attempt to create SparkContext with some
configuration, fail due to an error, and re-attempt the creation with new
settings. In this case, resources from the previous creation attempt might not
have been cleaned up and could lead to confusing errors (especially if the old,
leaked resources share global state with the new SparkContext).
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