Hi Hugh,
I have been using the log_enable method since June 20 and I have been able to use the conductor properly whenever necessary until today. I did shut the server down for a few minutes about a week ago so anything statewise might have happened then, but the only config file changes I made was to add another striped segment to the database as it was approaching its memory limit (I went from 4GB to 6GB allowable space on disk to finish up with 3 striped segments each made up of 2 1GB files) I am using the /sparql interface, so not the conductor as far as I know, and they are being done from a separate program that just submits the query in a HTTP POST request. I will restart the server using the isql interface and see if the bug pops up again. I can isolate the server from the INSERT stream if necessary to see whether the bug comes up again, but if I just restart the server the inserts will start again within seconds. I will just restart for now and see what happens to the conductor. Thanks, Peter > >From: Hugh Williams <hwilli...@openlinksw.com> >To: Peter Ansell <p_ans...@yahoo.com> >Cc: Virtuoso Users List <virtuoso-users@lists.sourceforge.net> >Sent: Monday, 10 August, 2009 9:57:52 AM >Subject: Re: [Virtuoso-users] Log enable/disable failure apparently causing >conductor to not display > > >Hi Peter, > > >Has this failure to load the conductor just started occurring as I assume you >have been using this log_enable option for sometime now ? > > >Are you performing these inserts using the Conductor SPARQL UI to perform your >inserts or is a separate program being used for this ? > > >Also, are you saying if the Virtuoso server is restarted the conductor works >but then fails to load after the inserts are started ? > > >Best Regards >Hugh Williams >Professional Services >OpenLink Software >Web: http://www.openlinksw.com >Support: http://support.openlinksw.com >Forums: http://boards.openlinksw.com/support > > > > >On 9 Aug 2009, at 23:35, Peter Ansell wrote: > >Hi all, >> >> >>I am using a particular server for a large number of constant and concurrent >>SPARUL INSERT's and it seems that it has broken itself somehow because the >>conductor doesn't show anymore. The SPARQL interface and INSERTS and >>CONSTRUCT's are still actually working but it is still worrying that the >>conductor could be broken so easily. >> >> >>As I was told to do in a past thread related to concurrency failures I added >>"define sql:log-enable 2 " to the front of all of my SPARUL queries to work >>around the issue with multiple concurrent SPARUL INSERT queries breaking the >>internal Virtuoso locking (or deadlock prevention) model, but it is possible >>that it has now broken the conductor. >> >> >>The message I am seeing whenever I try to access the /conductor page is: >> >> >>"Error 42000 >> >> >>SR471: log_enable () called twice to disable the already disabled log output >> >> >>There are no errors at all in the log since the last reboot so the log file >>won't be any help, and I am not sure I can replicate the issue after I reboot >>the server. The really puzzling thing about this error is that from a naive >>point of view it doesn't look fatal but it has fatal consequences! What could >>go wrong with someone trying to confirm that the log is disabled by calling >>the function again? Does the function have un-log-related sideeffects? >> >> >>The server version according to the logs is: >> >> >>"17:14:18 OpenLink Virtuoso Universal Server >>17:14:18 Version 05.11.3039-pthreads for Linux as of Jul 9 2009" >> >> >> >> >>Cheers, >> >> >>Peter >> >> >> >> >> >> __________________________________________________________________________________ >>Find local businesses and services in your area with Yahoo!7 Local. >>Get started: http://local.yahoo.com.au >> >> >> >> >>------------------------------------------------------------------------------ >>Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day >>trial. Simplify your report design, integration and deployment - and focus on >>what you do best, core application coding. Discover what's new with >>Crystal Reports now. http://p.sf.net/sfu/bobj-july >>_______________________________________________ >>Virtuoso-users mailing list >>Virtuoso-users@lists.sourceforge.net >>https://lists.sourceforge.net/lists/listinfo/virtuoso-users > __________________________________________________________________________________ Find local businesses and services in your area with Yahoo!7 Local. Get started: http://local.yahoo.com.au
