IndexWriter.rollback() logic question

[An Hong <An...@i365.com>]

A question about IndexWriter.rollback() logic.  Its javadoc says that it "Close the IndexWriter without committing any of the changes that have occurred since it was opened."  So if I do
1.  Open  IndexWriter
2.  Add doc1
3.  Commit (successfully)
4.  Add doc2
5.  PrepareCommit()
6.  Rollback()

Is doc1 in the index?  If not, I wonder how come rollback() does not roll back to the last successful commit() state instead?
Thanks,
An

Re: IndexWriter.rollback() logic question

[Michael McCandless <lu...@mikemccandless.com>]

The javadoc is not right -- I just committed a fix.

rollback() discards all changes since the last commit, or since the  
IndexWriter was opened (if commit hasn't been called).

So in your case, doc1 is in the index but doc2 is not.

You can also call rollback() not having called prepareCommit().

Mike

An Hong wrote:

> A question about IndexWriter.rollback() logic.  Its javadoc says  
> that it "Close the IndexWriter without committing any of the changes  
> that have occurred since it was opened."  So if I do
> 1.  Open  IndexWriter
> 2.  Add doc1
> 3.  Commit (successfully)
> 4.  Add doc2
> 5.  PrepareCommit()
> 6.  Rollback()
>
> Is doc1 in the index?  If not, I wonder how come rollback() does not  
> roll back to the last successful commit() state instead?
> Thanks,
> An
>


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