Maxim Solodovnik created OPENJPA-2972:
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Summary: Ceiling mutates shared operator field in appendTo
Key: OPENJPA-2972
URL: https://issues.apache.org/jira/browse/OPENJPA-2972
Project: OpenJPA
Issue Type: Sub-task
Components: jpa
Affects Versions: 4.2.0
Reporter: Maxim Solodovnik
Assignee: Romain Manni-Bucau
Fix For: 4.2.0
Discussion thread:
https://github.com/apache/openjpa/pull/144#discussion_r3683003416
**(low)** `appendTo` mutates the instance field `operator` before delegating to
`super.appendTo` (same pattern in NaturalLogarithm.java:49). Compiled query
plans are cached and shared, so this is a data race on shared state; passing
the dictionary function down locally (e.g. an `appendTo(..., String operator)`
overload in UnaryOp) would keep the Val immutable.
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