similar to: multiple writers and remotetcp backends

Hi, I have a user reporting the following error during recoll indexing: flush() failed: Db block overwritten - are there multiple writers? "flush() failed" is from recoll, the rest is, I think the text of the Xapian exception. This is with Xapian 1.4.3 on Linux (I asked for more details, should be coming). I don't think that I've ever seen this error, and I also

Hi, I'm adapting the omega (in a Python way ;) to do search across multiple remotes database, for now, I have only one xapian-tcpsrc running, but I have documents being inserted at the same time, so (like I have readed in others e-mails) the xapian-tcpsrc throw the following message: Connection from 192.168.0.101, port 64161 Got exception DatabaseModifiedError: The revision being read has

Olly Betts writes: > On Wed, May 17, 2017 at 09:08:32PM +0200, Jean-Francois Dockes wrote: > > I have a user reporting the following error during recoll indexing: > > > > flush() failed: Db block overwritten - are there multiple writers? > > > > "flush() failed" is from recoll, the rest is, I think the text of the Xapian > > exception.

Hi, dear Xapianers! I've been using Xapian in my project recently. The feature "single writer, multiple reader" is one of my favorite, but currently I can't make it work. My goal is to add more documents to the database increamentally, while the Xapian search process is not stopped. I followed "quickstartindex.cc" and "quickstartsearch.cc" on

Hello, Since the migration to xapian 1.4.X and the migration to Glass, i've recurrent database corruption errors. I've to reindex my database to make it works again. > DatabaseCorruptError: Expected block 200713 to be level 2, not 1 Theses problems always occur after this error: > xapian.DatabaseCorruptError: Db block overwritten - are there multiple writers? I've

On Sun, Jan 18, 2015 at 04:25:29PM +0000, James Aylett wrote: > That?s exactly how it?s supposed to work. ?Eventually? (once the > writer gets sufficiently far ahead of the reader), the reader will get > a DatabaseModifiedError and will have to re-open the database, but > until then it?s up to it when it does so. You may wish to do it every > N requests, or every K seconds, or only

On Mon, Mar 05, 2018 at 09:48:52PM +0000, Olly Betts wrote: > On Mon, Mar 05, 2018 at 08:52:47PM +0100, Sylvain Taverne wrote: > > I've remarked the error occur when i'm trying to get stored values from a > > database with a lot of stored values. I can reproduce the error with simple > > python2 script i've posted on github > > > >

I'm one of the developers of Notmuch, an email client that makes extensive use of Xapian. For some time, full multi-version concurrency control (MVCC) has been on our wish list. Olly mentioned that brass now uses free lists---a key step toward full MVCC---and I offered to pitch in on putting the other pieces into place. Before I wade too deep into this, I wanted to propose my plan. Full

I've looked over the docs on remote backends, the protocol, and a bit of the c++ for doing distributed and remote searches. I've got a couple of questions: * The remote protocol is usable only as a Database, not as a WriteableDatabase -- is this correct? So, if I don't want my application to have a copy of the database on the same machine I'll need to write an indexer daemon on

On Mon, Jul 09, 2018 at 10:29:18AM +0100, Olly Betts wrote: > The attached patch reset this cursor each time commit() is called, and > that fixes my C++ reproducer, though I think this ought to work as-is > and the real bug is at a lower level. I've dug deeper and that was indeed the case. Here's a patch which addresses the root cause:

Hi to all, I have Xapian 0.8.1 installed on a single processor RH9 machine with a custom 2.4.20 kernel. (I used ./configure without parameters.) I have followed the recent "threaded test" discussion here, and I have tested the examples: - Richard Boulton's example with one database, one writer, and three readers (1) works fine, I only see the expected DatabaseModifiedError. - Eric

Hi, I have read the concurrency webpage from the Xapian documentation: http://getting-started-with-xapian.readthedocs.io/en/latest/concepts/concurrency.html But it is still not clear to me how to ensure thread-safety when using libxapian (C++ API). Usually when doing multi-threading many threads can read the same variable concurrently without locking provided none of the threads modifies the

Hi all, We've struck a problem when using remote queries and hoping someone can offer some guidance. I haven't managed to get a C++ reproduction in the test suite, but I have got a demo that fails using Python: import xapian db = xapian.remote_open('localhost', 8100) qp = xapian.QueryParser() qp.set_database(db) query = qp.parse_query('test') enq =

I tried to compile xapian 1.0.1 under windows but the new /msvc/version.h file has #undef XAPIAN_HAS_REMOTE_BACKEND which prevents /backends/dbfactory_remote.cc to be built. The old (hand-written) version.h.win32 had it defined to 1. Everything build fine if I replace #undef with #define in version.h. Cheers, -- Daniel M?nard

On Wed, May 17, 2017 at 09:08:32PM +0200, Jean-Francois Dockes wrote: > I have a user reporting the following error during recoll indexing: > > flush() failed: Db block overwritten - are there multiple writers? > > "flush() failed" is from recoll, the rest is, I think the text of the Xapian > exception. > > This is with Xapian 1.4.3 on Linux (I asked for

On Thu, Mar 29, 2007 at 03:39:01PM +0100, richard wrote: > bin/xapian-tcpsrv.cc,tests/harness/testsuite.cc: First of many > parts of a large patch from Mark Hammond working towards enabling > remote databases on windows. When displaying errors which might > be socket errors, display the error number as well as the output > of strerror - on windows, strerror doesn't display

olly wrote: > SVN root: svn://svn.xapian.org/xapian > Changes by: olly > Revision: 9092 > Date: 2007-06-30 15:16:16 +0100 (Sat, 30 Jun 2007) > > Log message (2 lines): > api/omdocument.cc,common/document.h,include/xapian/document.h: > Add Xapian::Document::get_docid() method. I was thinking that it would probably be useful to have a

hi, i have problems getting nero recognize my atapi cd-writer under wine.. when i start nero, there's one message that repeats all the time: err:aspi:ASPI_GetHCforController Could not open HKEY_DYN_DATA\WineScsi\ControllerMap\c00, error=2 i think that is the cause, why my cd-writer isn't recognized by nero, but what can i do about that? or what does this message tell me? ;) thx in

Hey gang, A post on the Rails forum a while back had it sound like you pretty much had to use the Index Readers & Writers if you were going to be potentially accessing an index from more than one process. (i.e. multiple dispatch.fcgi''s, etc) Is this still the case, or does the main Index class do that black magic behind the scenes? =) I was having trouble implementing the

Hi all, Currently I'm implementing a retrieval system with multiple reader processes and only one writer process updating the database periodically. In a reader process, whenever a Xapian::DatabaseModifiedError exception is caught, I call function reopen() and retry. However, my problem is, when there is only a small set of modification, e.g. only one new document is added, the reader would