Github user marmbrus commented on the pull request:
https://github.com/apache/spark/pull/5089#issuecomment-84448218
I don't believe that it is generally safe to catch `OutOfMemoryError` as
the JVM is in an undefined state after this error has occurred (It is called a
fatal error for a reason). For example, some of Spark's other threads or
actors could have also received the exception and died. As a result I think we
should close this issue in favor of a solution like
https://issues.apache.org/jira/browse/SPARK-4476. Note that until then you can
manually specify a schema that includes a MapType.
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