Gopal V created HIVE-4078:
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Summary: Remove the serialize-deserialize pair in
CommonJoinResolver
Key: HIVE-4078
URL: https://issues.apache.org/jira/browse/HIVE-4078
Project: Hive
Issue Type: Bug
Components: Query Processor
Reporter: Gopal V
Assignee: Gopal V
CommonJoinProcessor tries to clone a MapredWork while attempting a conversion
to a map-join
{code}
// deep copy a new mapred work from xml
InputStream in = new ByteArrayInputStream(xml.getBytes("UTF-8"));
MapredWork newWork = Utilities.deserializeMapRedWork(in,
physicalContext.getConf());
{code}
which is a very heavy operation memory wise & cpu-wise.
Instead of cloning via XMLEncoder, it is faster to use BeanUtils.cloneBean()
which is following same data paths (get/set bean methods) instead.
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