Thanks Mike for the information.
Actually I am using RemoteParallelMultiSearcher with 10 Search Servers, my
crawler program freequently add new documents in to all the Search Servers
in a distributed manner. So in this case, if I add a document in a
particular index, I need to restart the searcher program in that server.
right? Can I do this with a remote call, or I want to add a new method to
Searchable interface?
Thanks,
Sunil
On 10/26/06, Michael McCandless <[EMAIL PROTECTED]> wrote:
Sunil Kumar PK wrote:
> could you please explain?
>
> On 10/26/06, Karel Tejnora <[EMAIL PROTECTED]> wrote:
>> Nope. IndexReader obtains a snapshot of index - not closing and opening
>> indexreader leads to not deleting files (windows exception, linux will
>> not free them).
>> > Is it possible to get all the matching document in the result without
>> > restarting the Searcher program?
A searcher once created only searches the index as of the "point in
time" that it was created. Ie, it's an unchanging snapshot. So any
deletes/updates that happen to the index by a writer will not be visible
until you close and reopen another searcher.
This "point in time" searching relies on certain properties of the
underlying filesystem in order to work properly. Windows local and
remote (SMB) filesystems work because files that are open can't be
deleted (and Lucene just retries); local UNIX filesystems work because
the open file handle can still access a deleted file ("delete on last
close").
However: NFS does not have "delete on last close", so you can't rely on
"point in time" searching when using NFS across machines (it's possible
a single machine may work). If a writer on a different machine has
committed to the index that a searcher is using over NFS then the
searcher will eventually hit an IOException with "stale NFS handle".
See here for details on current known issues with NFS:
http://issues.apache.org/jira/browse/LUCENE-673
Mike
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