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https://issues.apache.org/jira/browse/IMPALA-6877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16463134#comment-16463134
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Bikramjeet Vig commented on IMPALA-6877:
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[~bharathv]
All the vmodule patterns are stored in a separate list and have individual
levels set to them which always take priority over the global FLAGS_v value. If
you change "-v" that would only change the global FLAGS_v and anything *not a
part* of the vmodule list will be affected.
TLDR: anything added to the vmodule list will be handled separately from the
global FLAGS_v.
So, if we added a pattern/module to the vmodule list and want to keep it in
sync with FLAGS_v, we will have to reset its value to FLAGS_v everytime we
change FLAGS_v
> Allow setting -vmodule from debug page
> --------------------------------------
>
> Key: IMPALA-6877
> URL: https://issues.apache.org/jira/browse/IMPALA-6877
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Affects Versions: Impala 2.12.0
> Reporter: Tim Armstrong
> Assignee: Bikramjeet Vig
> Priority: Major
> Labels: supportability
>
> We allow setting the global verbosity level from the debug page, but we don't
> allow setting it per module, E.g. -vmodule admission-controller=2
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