Akihiro Matsukawa created PIG-3844:
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Summary: Make ScriptState InheritableThreadLocal for threads that
need it
Key: PIG-3844
URL: https://issues.apache.org/jira/browse/PIG-3844
Project: Pig
Issue Type: Improvement
Reporter: Akihiro Matsukawa
Assignee: Akihiro Matsukawa
I have a PPNL that is forked off the main thread so that its operations does
not block pig from continuing to run. This PPNL needs the ScriptState, but is
not able to get it in pig13 because the ScriptState is ThreadLocal.
In pig12, this worked because there was logic to start a new ScriptState on
ScriptState.get() which was removed in PIG-3525
(https://reviews.apache.org/r/15634).
My proposal is to change ScriptState to be InheritableThreadLocal, so that any
new child threads that are spawned will have a copy of it. I have a pretty
limited understanding of pig, but I do not see anything that this proposed
change would break.
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