Prasanth Jayachandran created TEZ-3721:
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Summary: Extend CallableWithNdc to also clone MDC
Key: TEZ-3721
URL: https://issues.apache.org/jira/browse/TEZ-3721
Project: Apache Tez
Issue Type: Improvement
Reporter: Prasanth Jayachandran
Assignee: Prasanth Jayachandran
CallableWithNdc currently clones only NDC. Hive LLAP uses MDC all over and have
to implement custom threadpools to copy MDC over to NDC and vice versa (with
reflection!!) to keep the context around.
Two possibilities will make this easier
1) Keep CallableWithNdc class around and add cloning of MDC
2) Add new class CallableWithDiagnosticContext, deprecate CallableWithNdc and
change all tez code to use CallableWithDiagnosticContext
1 is easier as it doesn't change anything. 2 is cleaner wrt to class name but
little intrusive.
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