Robert Muir created LUCENE-6085:
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Summary: Add back SI.attributes (safely)
Key: LUCENE-6085
URL: https://issues.apache.org/jira/browse/LUCENE-6085
Project: Lucene - Core
Issue Type: Bug
Reporter: Robert Muir
We removed this for two reasons:
* nothing was using it
* the map is "unsafe" if a codec tried to write to it during in-place dv update.
But Adrien has a real use case (LUCENE-5914), and I think we can just add some
safety for the updates case (e.g. if the map is unmodifiable then the trap will
not exist, any put() will throw exception). In general, we should have more
safety in SI anyway (diagnostics map, too).
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