Chinmay Kulkarni created PHOENIX-6190:
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Summary: Race condition in view creation may allow conflicting
changes for pre-4.15 clients and for scenarios with
phoenix.allow.system.catalog.rollback=true
Key: PHOENIX-6190
URL: https://issues.apache.org/jira/browse/PHOENIX-6190
Project: Phoenix
Issue Type: Bug
Affects Versions: 4.15.0, 5.0.0
Reporter: Chinmay Kulkarni
Fix For: 5.1.0, 4.16.0
For pre-4.15 clients and in scenarios where
phoenix.allow.system.catalog.rollback=true, we have to block adding/dropping a
column to/from a parent table/view as we no longer lock the parent on the
server side while creating a child view to prevent conflicting changes. This is
handled on the client side from 4.15 onwards.
However, there is a slight race condition here where a view may be created
between the time we find all children of the parent and the time we do this
check (see
[this|https://github.com/apache/phoenix/blob/264310bd1e6c14996c3cfb11557fc66a012cb01b/phoenix-core/src/main/java/org/apache/phoenix/coprocessor/MetaDataEndpointImpl.java#L2592]).
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