Jacky Li created SPARK-4787:
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Summary: Resource unreleased during failure in SparkContext
initialization
Key: SPARK-4787
URL: https://issues.apache.org/jira/browse/SPARK-4787
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 1.1.0
Reporter: Jacky Li
Fix For: 1.3.0
When client creates a SparkContext, currently there are many val to initialize
during object initialization. But when there is failure initializing these val,
like throwing an exception, the resources in this SparkContext is not released
properly.
For example, SparkUI object is created and bind to the HTTP server during
initialization using
{{ui.foreach(_.bind())}}
but if anything goes wrong after this code (say throwing an exception when
creating DAGScheduler), the SparkUI server is not stopped, thus the port bind
will fail again in the client when creating another SparkContext. So basically
this leads to a situation that the client can not create another SparkContext
in the same process, which I think it is not reasonable.
So, I suggest to refactor the SparkContext code to release resource when there
is failure during in initialization.
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