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https://issues.apache.org/jira/browse/LUCENE-1749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12739120#action_12739120
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Michael McCandless commented on LUCENE-1749:
--------------------------------------------
{quote}
Asking the searcher for the docFreq is the right thing to do... but people who
rely on Weight being serializable might be in for a nasty surprise.
{quote}
Argh, right.
bq. If we decide not to ask weight to hang onto it's searcher, then the other
way to do it right is to change explain() to accept a Searcher as well as a
IndexReader.
+1
bq. Of course... one might wonder if we should bother supporting serializable
in Lucene longer term at all - anyone dealing with distributed systems has
found it to have too many shortcomings anyway.
Yeah this was never really "settled" in LUCENE-1473. Lucene currently
supports live serialization, but not cross-version
serialization... and we have moved RemoteSearchable to contrib and
removed RMI from Searchable.
Does Solr ever rely on Lucene's "implements Serializable"?
> FieldCache introspection API
> ----------------------------
>
> Key: LUCENE-1749
> URL: https://issues.apache.org/jira/browse/LUCENE-1749
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Reporter: Hoss Man
> Priority: Minor
> Fix For: 2.9
>
> Attachments: fieldcache-introspection.patch,
> LUCENE-1749-hossfork.patch, LUCENE-1749.patch, LUCENE-1749.patch,
> LUCENE-1749.patch, LUCENE-1749.patch, LUCENE-1749.patch, LUCENE-1749.patch,
> LUCENE-1749.patch, LUCENE-1749.patch, LUCENE-1749.patch, LUCENE-1749.patch
>
>
> FieldCache should expose an Expert level API for runtime introspection of the
> FieldCache to provide info about what is in the FieldCache at any given
> moment. We should also provide utility methods for sanity checking that the
> FieldCache doesn't contain anything "odd"...
> * entries for the same reader/field with different types/parsers
> * entries for the same field/type/parser in a reader and it's subreader(s)
> * etc...
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