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From: Apache Wiki <wikidiffs@apache.org>
To: Apache Wiki <wikidiffs@apache.org>
Date: Mon, 01 Feb 2010 23:50:16 -0000
Message-ID: <20100201235016.21358.81868@eos.apache.org>
Subject: 
 =?utf-8?q?=5BLucene-java_Wiki=5D_Update_of_=22LuceneFAQ=22_by_MikeMcCandl?=
 =?utf-8?q?ess?=

Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Lucene-java Wiki" f=
or change notification.

The "LuceneFAQ" page has been changed by MikeMcCandless.
The comment on this change is: Remove stale FAQ entry -- as of 2.1 you shou=
ld not hit FileNotFoundException when reading & writing the same index.
http://wiki.apache.org/lucene-java/LuceneFAQ?action=3Ddiff&rev1=3D141&rev2=
=3D142

--------------------------------------------------

  =3D=3D=3D=3D How do I speed up searching? =3D=3D=3D=3D
  =

  See ImproveSearchingSpeed.
- =

- =3D=3D=3D=3D Why do I sometimes get a FileNotFoundException when I search=
 and update my index at the same time? =3D=3D=3D=3D
- =

- This typically happens when people do one or more of the following things:
-   * Disable the locking on one or more of the processes searching or upda=
ting the index.
-   * Configure a different lockDir for at least one of the processes searc=
hing or updating the index.
-   * Try to search or update an index with the lockDir configured to be on=
 an NFS (or Samba) mounted filesystem.
- =

- Even though index searching is a read only operation, the !IndexSearcher =
must momentarily lock the index when it is opened in order to get the list =
of files in the index.  If locking is not configured properly it gets an in=
correct list (because the list of files changes as the !IndexWriter adds do=
cs or optimizes the index).  Remote filesystems (like NFS and Samba) rarely=
 work, because they cannot make the transactional guarantees neccessary to =
ensure that all clients get consistent views of the directory.
  =

  =3D=3D=3D Indexing =3D=3D=3D
 =20