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From "Uwe Schindler" <...@thetaphi.de>
Subject RE: too many file descriptors opened by Lucene shows (deleted) in /proc
Date Fri, 04 Sep 2009 09:47:43 GMT
Yes you are doing the reopen right, but my question was: in your code "//
reOpen", which is not visible, do you close the old reader after reopen? If
you do not do this, it stays open forever. This is what I suggested by my
example.

-----
Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen
http://www.thetaphi.de
eMail: uwe@thetaphi.de

> -----Original Message-----
> From: Ganesh [mailto:emailgane@yahoo.co.in]
> Sent: Friday, September 04, 2009 11:39 AM
> To: java-user@lucene.apache.org
> Subject: Re: too many file descriptors opened by Lucene shows (deleted) in
> /proc
> 
> I doing the following way.
> 
> if (!reader.isCurrent()) {
> //reOpen
> }
> 
> I tried debugging and my log shows the correct reference count. Any other
> idea?
> 
> Regards
> Ganesh
> 
> ----- Original Message -----
> From: "Uwe Schindler" <uwe@thetaphi.de>
> To: <java-user@lucene.apache.org>
> Sent: Friday, September 04, 2009 1:12 PM
> Subject: RE: too many file descriptors opened by Lucene shows (deleted) in
> /proc
> 
> 
> > One general trap with reopen(): Reopen() returns a *new* IndexReader. If
> > this new IndexReader is different from the actual one, you have to close
> the
> > old reader when you are finished working on it. If you only have one
> thread
> > working on this IndexReader that is reopened, you can close the old
> reader
> > directly after reopening:
> >
> > IndexReader new = actualReader.reopen();
> > if (new != actualReader) {
> > actualReader.close();
> > actualReader = new;
> > }
> >
> > If you have some multithreaded architecture, you have to keep the old
> reader
> > open as long as there are accesses (which you can manage by
> refcounting).
> >
> > -----
> > Uwe Schindler
> > H.-H.-Meier-Allee 63, D-28213 Bremen
> > http://www.thetaphi.de
> > eMail: uwe@thetaphi.de
> >
> >> -----Original Message-----
> >> From: Ganesh [mailto:emailgane@yahoo.co.in]
> >> Sent: Friday, September 04, 2009 9:35 AM
> >> To: java-user@lucene.apache.org
> >> Subject: Re: too many file descriptors opened by Lucene shows (deleted)
> in
> >> /proc
> >>
> >> I am having only one process using Lucene DB. The same process writes
> and
> >> reads. I do re-open indexreader. I am maintaing ref count for each
> >> reader/searcher and closing it if it is not used. I am not able to
> >> understand, why the file descriptor is showing as (deleted)?
> >>
> >> I guessing some issues? Could any one tell me what are the other part
> of
> >> code to look in to (related to Lucene)? Any other way to identify the
> root
> >> cause?
> >>
> >> Regards
> >> Ganesh
> >>
> >>
> >> ----- Original Message -----
> >> From: "Uwe Schindler" <uwe@thetaphi.de>
> >> To: <java-user@lucene.apache.org>
> >> Sent: Friday, September 04, 2009 11:56 AM
> >> Subject: RE: too many file descriptors opened by Lucene shows (deleted)
> in
> >> /proc
> >>
> >>
> >> > This is normal. When you open an IndexReader/IndexSearcher, it opens
> >> various
> >> > file handles. If you additionally update/add/delete documents in
> >> parallel
> >> > (even in other process), or optimize the index, the original
> IndexReader
> >> > stays on using the "old" state of the index. IndexWriter deletes some
> >> files,
> >> > but IndexReader still have them open (this is our segment based
> >> > "transaction" handling of IndexWriter). If you reopen your
> IndexReader
> >> to
> >> > get the last updates of the underlying index, these "deleted" files
> will
> >> > disappear, as they can be closed. As long as they are open, they
> >> disappear
> >> > from directory listing, but they still consume space on disk (because
> >> they
> >> > are still used). This is why you see this deleted files.
> >> >
> >> > -----
> >> > Uwe Schindler
> >> > H.-H.-Meier-Allee 63, D-28213 Bremen
> >> > http://www.thetaphi.de
> >> > eMail: uwe@thetaphi.de
> >> >
> >> >> From: Ganesh [mailto:emailgane@yahoo.co.in]
> >> >> Sent: Friday, September 04, 2009 8:11 AM
> >> >> To: java-user@lucene.apache.org
> >> >> Subject: too many file descriptors opened by Lucene shows (deleted)
> in
> >> >> /proc
> >> >>
> >> >> Hello all,
> >> >>
> >> >> In my linux pc, there are too many fd counts for lucene database.
> >> >> /proc/<processid>/fd shows very big list. I have provided sample
> below.
> >> >>
> >> >> lr-x------    1 root     root           64 Sep  3 17:02 360 ->
> >> >> /opt/ganesh/lucenedb/_2w5.tvf (deleted)
> >> >> lr-x------    1 root     root           64 Sep  3 17:02 361 ->
> >> >> /opt/ganesh/lucenedb/_hr.frq (deleted)
> >> >> lr-x------    1 root     root           64 Sep  3 17:02 362 ->
> >> >> /opt/ganesh/lucenedb/_hr.prx (deleted)
> >> >> lr-x------    1 root     root           64 Sep  3 17:02 363 ->
> >> >> /opt/ganesh/lucenedb/_hr.tvx (deleted)
> >> >> lr-x------    1 root     root           64 Sep  3 21:01 364 ->
> >> >> /opt/ganesh/lucenedb/_hr.tvd (deleted)
> >> >> lr-x------    1 root     root           64 Sep  3 17:02 365 ->
> >> >> /opt/ganesh/lucenedb/_hr.tvf (deleted)
> >> >> lr-x------    1 root     root           64 Sep  3 17:02 366 ->
> >> >> /opt/ganesh/lucenedb/_2w4.fdt (deleted)
> >> >> lr-x------    1 root     root           64 Sep  3 17:02 367 ->
> >> >> /opt/ganesh/lucenedb/_2w4.fdx (deleted)
> >> >>
> >> >> These files not exist in the disk but why it is showing as (deleted)
> in
> >> >> the /proc. This means the process is still holding the fd. Please
> >> provide
> >> >> me more information on this. I am using Fedora Linux, ext-3 file
> >> system,
> >> >> Lucene 2.4.1.
> >> >>
> >> >> Regards
> >> >> Ganesh
> >> >> Send instant messages to your online friends
> >> http://in.messenger.yahoo.com
> >> >>
> >> >> --------------------------------------------------------------------
> -
> >> >> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> >> >> For additional commands, e-mail: java-user-help@lucene.apache.org
> >> >
> >> >
> >> >
> >> > ---------------------------------------------------------------------
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> >> >
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> >>
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> >
> >
> >
> > ---------------------------------------------------------------------
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> >
> Send instant messages to your online friends http://in.messenger.yahoo.com
> 
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