[ monetdb-Bugs-2892548 ] SQL: concurrency triggers gdk assertion

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Bugs item #2892548, was opened at 2009-11-05 12:56
Message generated for change (Tracker Item Submitted) made by vzzzbx
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Category: Core
Group: MonetDB Common "stable"
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Wouter Alink (vzzzbx)
Assigned to: Nobody/Anonymous (nobody)
Summary: SQL: concurrency triggers gdk assertion

Initial Comment:
Version: Yesterday's Nov2009 cvs.

similar to [bug 2890035]
When running 20 simultaneous jdbc connections, the mserver5 crashes (after a while) with the error below. If running the same amount of queries through 10 jdbc connections, the mserver5 instance does not crash.


$  ~/opt/MonetDB-stable/bin/mserver5 --dbinit="include sql;" --set mapi_port=50259 --dbfarm=/export/scratch0/roberto/wouter/dbfarm/ --dbname=db1
# MonetDB server v5.14.3, based on kernel v1.32.3
# Serving database 'db1', using 4 threads
# Compiled for x86_64-unknown-linux-gnu/64bit with 64bit OIDs dynamically linked
# Copyright (c) 1993-July 2008 CWI.
# Copyright (c) August 2008-2009 MonetDB B.V., all rights reserved
# Visit http://monetdb.cwi.nl/ for further information
#warning: please don't forget to set your vault key!
#(see /home/alink/opt/MonetDB-stable/etc/monetdb5.conf)
# Listening for connection requests on mapi:monetdb://127.0.0.1:50259/
# MonetDB/SQL module v2.32.3 loaded
>mserver5: /export/scratch0/roberto/wouter/workspace/MonetDB/MonetDB/src/gdk/gdk_bbp.mx:1759: incref: Assertion `BBP[(((int)(i))>0?((int)(i)):-((int)(i)))].refs+BBP[(((int)(i))>0?((int)(i)):-((int)(i)))].lrefs || BBP[(((int)(i))>0?((int)(i)):-((int)(i)))].status&16' failed.
Aborted


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