Sergey Soldatov created PHOENIX-3974:
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Summary: Create index may issue a distributed dead lock due lack
of handlers
Key: PHOENIX-3974
URL: https://issues.apache.org/jira/browse/PHOENIX-3974
Project: Phoenix
Issue Type: Bug
Affects Versions: 4.11.0
Reporter: Sergey Soldatov
Assignee: Sergey Soldatov
In PHOENIX-3360 we were trying to avoid using index rpc on client side, setting
controller manually in Indexer. But after we moved index creating to server
side there is another set of RS-RS communication that comes from
UngroupedAggregateRegionObserver with regular priority. That may cause
distributed dead lock when all handlers are occupied by index create scanners
for user table and inside they are trying to send index updates. To prevent it
we need to set controller in UngroupedAggregateRegionObserver in the similar
way like we did in Indexer.
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