Alan Woodward created LUCENE-9325:
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Summary: Sort and SortField are not immutable
Key: LUCENE-9325
URL: https://issues.apache.org/jira/browse/LUCENE-9325
Project: Lucene - Core
Issue Type: Improvement
Reporter: Alan Woodward
Assignee: Alan Woodward
The `Sort` and `SortField` classes are currently mutable, which makes them
dangerous to use in multiple threads. In particular, you can set an index sort
on an IndexWriterConfig and then change its internal sort fields while the
index is being written to.
We should make all member fields on these classes final, and in addition we
should make `Sort` final itself.
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