[Monetdb-developers] Restart mclient

Romulo Antonio Goncalves R.A.Goncalves at cwi.nl
Tue Sep 7 17:42:29 CEST 2010


Indeed,

The problem is gone. Thanks a lot.

Regards,
Romulo

----- Original Message -----
From: "Sjoerd Mullender" <sjoerd at acm.org>
To: monetdb-developers at lists.sourceforge.net
Sent: Tuesday, September 7, 2010 3:22:47 PM
Subject: Re: [Monetdb-developers] Restart mclient

The culprit seems to be changeset f2ceaaf24796:

changeset: 37471:f2ceaaf24796
parent: 37469:3733beae1496
user: Fabian Groffen <fabian at cwi.nl>
date: Fri Sep 03 15:27:26 2010 +0200
files: MonetDB5/src/mal/mal_session.mx
description: bugzie says that bug #1939 is fixed, so disable the guard

On 2010-09-07 16:02, Romulo Antonio Goncalves wrote:
> Hello,
>
> I updated my default branch and I do the following:
>
> mclient -lmal
>> \q
> mclient -lmal
>> \q
>
> After the second exit I get a crash in the mserver:
>> [New Thread 0x7fffdf7ac710 (LWP 19441)]
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0x7fffdf7ac710 (LWP 19441)]
> 0x00007ffff7cd7198 in MALexitClient (c=0x605b38) at
> /ufs/goncalve/MonetDB/current/MonetDB5/src/mal/mal_session.mx:522 522
> if (c->glb && c->curprg->def->errors == 0)
> (gdb) p c->curprg->def
> $1 = (struct MALBLK *) 0xdbdbdbdbdbdbdbdb
>
> Similar problem if you do
> mclient -lsql
>> \q
> mclient -lsql
>
> The mserver crashes due to the same problem:
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0x7fffdf7ac710 (LWP 19561)]
> 0x00007fffdfe22a60 in SQLparser (c=0x605b38) at
> /ufs/goncalve/MonetDB/current/sql/src/backends/monet5/sql_scenario.mx:1155
> 1155 oldvtop = c->curprg->def->vtop;
> (gdb) p c->curprg
> $5 = (Symbol) 0x7fffd8112198
> (gdb) p *c->curprg
> $6 = {peer = 0xdbdbdbdbdbdbdbdb, skip = 0xdbdbdbdbdbdbdbdb,
>   name = 0xdbdbdbdbdbdbdbdb <Address 0xdbdbdbdbdbdbdbdb out of
>   bounds>, kind = -606348325, def = 0xdbdbdbdbdbdbdbdb}
> (gdb)
>
>
> Were there any changes in the client structure or in the
> initialization of the of the client threads?
>
> Regards,
> Romulo
>
> PS: It does not happen in the Oct2010 branch.
>
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-- Sjoerd Mullender


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