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https://issues.apache.org/jira/browse/LUCENE-1645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12711185#action_12711185
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Michael McCandless commented on LUCENE-1645:
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bq. IFF the subreader being cloned is not readonly!
OK.
{quote}
Hey, let's reverse readonly/writeable reader inheritance?
WriteableSegmentReader extends SegmentReader.
SegmentReader is readonly by behaviour and in code - there are no syncs and
mutator methods throw UOE. WriteableSegmentReader adds a writeability layer
over SegmentReader and all the gory syncs.
{quote}
That sounds right, but let's do this as a separate issue? And leave this issue
on fixing this particular bug.
{quote}
Hey, open a new IR if you want to write. Cloning/reopening an IR while
simultaneously switching readonly flag is a feature that gives user zero new
functionality, absolutely nothing he can't accomplish using a new IR, but makes
reopening/cloning code more complex.
{quote}
Opening a new IR is quite a bit more costly than cloning/reopening.
Plus the reopen/cloning code will still need the complexity because internal to
Lucene we still need to do this. We are only discussing whether the
functionality should remain public, which I think it should.
> Deleted documents are visible across reopened MSRs
> --------------------------------------------------
>
> Key: LUCENE-1645
> URL: https://issues.apache.org/jira/browse/LUCENE-1645
> Project: Lucene - Java
> Issue Type: Bug
> Affects Versions: 2.9
> Reporter: Earwin Burrfoot
> Fix For: 2.9
>
> Attachments: LUCENE-1645.patch
>
>
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