Matt Cheah created SPARK-6405:
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Summary: Spark Kryo buffer should be forced to be max. 2GB
Key: SPARK-6405
URL: https://issues.apache.org/jira/browse/SPARK-6405
Project: Spark
Issue Type: Improvement
Components: Spark Core
Affects Versions: 1.3.0
Reporter: Matt Cheah
Fix For: 1.4.0
Kryo buffers used in serialization are backed by Java byte arrays, which have a
maximum size of 2GB. However, we blindly set the size without worrying about
numeric overflow or regards to the maximum array size. We should enforce the
maximum buffer size to be 2GB and warn the user when they have exceeded that
amount.
I'm open to the idea of flat-out failing the initialization of the Spark
Context if the buffer size is over 2GB, but I'm afraid that could break
backwards-compatability... although one can argue that the user had incorrect
buffer sizes in the first place.
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