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Re: pkg/48258: mysql-server startup files may try to set to high fd-limit in pkgsrc-startup-file

Hi again,

I've just found "my" problem why the mysqld does not start during boot.

The problem is "located" in mysqld_safe.
Prior the logging is realy setup, a message is send by log_notice (or similar) to the stdout. (Same happens if I try not to all the shell-funtion and just echo the line.)
It looks like the login process on the console has already started and all previous fd's to /dev/console has been revoked. Why this simply kills the shell I still don't know. And why writing to stdout later is ignored without crashing the shell is also a little bit strange. If I "disable" this output (e.g. by setting the true command in front of the line) further output is redirected to the log-file of syslog (not tested, but should work too) and the DB-server comes up. 

This is very very bad !!!!!
We seems to have a timing problem during startup here.
The only known workaround to me is to add a sleep in the rc-file after backgrounding mysqld_save. Not very smart and not realy relyable.
For my system a "sleep 1" is good for all my startup tries (till now). So a "sleep 5" should do it for this system with excactly this set of programs started during boot. 
But this is no sollution - just try, error and hope it wil not break ...
I try to get the syscall that kills the shell by starting ktrace short time in front of the location of the problem - but cannot say how much time I need to get a sollution. The current startup script simply does not work on NetBSD 6.1. With the sleep mentioned above the problem can be worked around for unknown reasons. 

best regards

W. Stukenbrock

Wolfgang Stukenbrock wrote:


The following reply was made to PR pkg/48258; it has been noted by GNATS.

From: Wolfgang Stukenbrock <wolfgang.stukenbrock%nagler-company.com@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: pkg-manager%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost, 
pkgsrc-bugs%NetBSD.org@localhost
Subject: Re: pkg/48258: mysql-server startup files may try to set to high 
fd-limit in pkgsrc-startup-file
Date: Wed, 02 Oct 2013 14:32:37 +0200

 Hi - OK, I haven't tested that again on NetBSD.
On Solaris ulimit with a to large value will give an error. (tested again in /bin/sh and with setrlimit() for some minutes.) On NetBSD there seems to be (now) the feature that ulimit in /bin/sh and setrlimit() will clamp the parameter passed to the maximum - the hard-limit. So for NetBSD this is working, but for any other system that does not silently clamp the value it doesn't. 
 I'm not shure about the set of OS's that is affected. At least Solaris 8 is.
pkgsrc is for more than "only" NetBSD, so I think it would be better not to "hope" that the system will truncate to the max. 
 Sorry for not explicitly testing on NetBSD prior sending the report.
By The way, I have had this problem with the FD-limit with mysqld in the past, so that I have added some commandline options in my automated DB-setup scripts that are executed during system installation, but I'm not shure about the NetBSD version where I've added this (3.x or 4.x). It is still in there, even it is (perhaps) now no longer needed. And I remember that my main DB-server has crashed when I try to set a larger value as the kernel supports in the DB-server-config file - e.g. when I boot a GENERIC for some reasons - I've increased the hard-limit in the "normal" kernel for this system. That system currently runs NetBSD 4.x. just for information (till now): I'm debugging an other problem with the delivered rc-files for mysql-server 5.5, because the DB-server crashes during startup when started during system startup on NetBSD 6.1. Calling "/etc/rc.d/mysqld start" by hand later will bring the deamon up. (It seems to be either mysql 5.5 related or is a problem with NetBSD 6.1, because mysql 5.1 on NetBSD 5.1.2 does not show this problem on several installations.) Still not found what it is. Without additional debugging inserted the DB-server runs into SEGV after setting up the socket and prior the message that it is now listening in the error log. But when started under ktrace it still does not start, but it now looks like "something" is shutting down the server during startup (no SEGV anymore), but the normal shutdown messages are in the error-log file of the DB-server. Very strange till now ... best regards W. Stukenbrock OBATA Akio wrote: > The following reply was made to PR pkg/48258; it has been noted by GNATS. > > From: "OBATA Akio" <obache%netbsd.org@localhost> 
 > To: gnats-bugs%netbsd.org@localhost
> Cc: > Subject: Re: pkg/48258: mysql-server startup files may try to set to high 
 >  fd-limit in pkgsrc-startup-file
 > Date: Wed, 02 Oct 2013 20:19:35 +0900
> > On Wed, 02 Oct 2013 20:00:00 +0900, <Wolfgang.Stukenbrock%nagler-company.com@localhost> wrote: > > >> How-To-Repeat: 
 >  >     setup a fresh system (e.g. amd64), log in and run "ulimit -Hn". It 
will report 3404.
 >  >     And so setting 4096 in the rc-file will (silently) fail and the 
server will stay at 128 fd's.
> > I cannot reproduce it on NetBSD-5.1.2-i386, soft limit will be up to the hard limit: > > # ulimit -Hn 
 >  3404
 >  # ulimit -Sn
 >  128
 >  # ulimit -n 4096
 >  # ulimit -Hn
 >  3404
 >  # ulimit -Sn
 >  3404
> > -- > OBATA Akio / obache%NetBSD.org@localhost > > > > Received: from DB3PR07MB171.eurprd07.prod.outlook.com (10.242.132.149) by 
 >  DB3PR07MB169.eurprd07.prod.outlook.com (10.242.132.141) with Microsoft SMTP
 >  Server (TLS) id 15.0.775.9 via Mailbox Transport; Wed, 2 Oct 2013 11:25:09
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SMTP
 >  Server (TLS) id 15.0.785.10 via Frontend Transport; Wed, 2 Oct 2013 11:25:06
 >  +0000
 > Received: from mollari.NetBSD.org (blog.netbsd.org [149.20.53.80])        by
 >  e002.nagler-company.com (8.14.5/8.14.5) with ESMTP id r92BP2js014397     for
 >  <Wolfgang.Stukenbrock%nagler-company.com@localhost>; Wed, 2 Oct 2013 
13:25:06 +0200
 >  (CEST)
 > Received: by mollari.NetBSD.org (Postfix, from userid 31008)      id 
612697100A;
 >  Wed,  2 Oct 2013 11:25:01 +0000 (UTC)
 > From: OBATA Akio <obache%NetBSD.org@localhost>
 > To: <pkg-manager%NetBSD.org@localhost>, <gnats-admin%NetBSD.org@localhost>,
 >   <pkgsrc-bugs%NetBSD.org@localhost>, 
<Wolfgang.Stukenbrock%nagler-company.com@localhost>
 > Reply-To: <gnats-bugs%NetBSD.org@localhost>
 > Subject: Re: pkg/48258: mysql-server startup files may try to set to high
 >  fd-limit in pkgsrc-startup-file
 > References: <pr-pkg-48258%gnats.netbsd.org@localhost>
 >   <20131002105744.E5864123B93%test-s0.nagler-company.com@localhost>
 > X-Gnats-Was-Stupid: no
 > CC:
 > Message-ID: <20131002112501.612697100A%mollari.NetBSD.org@localhost>
 > Date: Wed, 2 Oct 2013 11:25:01 +0000
 > Return-Path: gnats%NetBSD.org@localhost
 > X-MS-Exchange-Organization-MessageDirectionality: Incoming
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> > The following reply was made to PR pkg/48258; it has been noted by GNATS. > > From: "OBATA Akio" <obache%netbsd.org@localhost> 
 > To: gnats-bugs%netbsd.org@localhost
> Cc: > Subject: Re: pkg/48258: mysql-server startup files may try to set to high 
 >  fd-limit in pkgsrc-startup-file
 > Date: Wed, 02 Oct 2013 20:19:35 +0900
> > On Wed, 02 Oct 2013 20:00:00 +0900, <Wolfgang.Stukenbrock%nagler-company.com@localhost> wrote: > > >> How-To-Repeat: 
 >  >     setup a fresh system (e.g. amd64), log in and run "ulimit -Hn". It 
will report 3404.
 >  >     And so setting 4096 in the rc-file will (silently) fail and the 
server will stay at 128 fd's.
> > I cannot reproduce it on NetBSD-5.1.2-i386, soft limit will be up to the hard limit: > > # ulimit -Hn 
 >  3404
 >  # ulimit -Sn
 >  128
 >  # ulimit -n 4096
 >  # ulimit -Hn
 >  3404
 >  # ulimit -Sn
 >  3404
> > -- > OBATA Akio / obache%NetBSD.org@localhost > > -- Dr. Nagler & Company GmbH 
 Hauptstraße 9
 92253 Schnaittenbach
Tel. +49 9622/71 97-42 
 Fax +49 9622/71 97-50
Wolfgang.Stukenbrock%nagler-company.com@localhost 
 http://www.nagler-company.com
Hauptsitz: Schnaittenbach 
 Handelregister: Amberg HRB
 Gerichtsstand: Amberg
 Steuernummer: 201/118/51825
 USt.-ID-Nummer: DE 273143997
 Geschäftsführer: Dr. Martin Nagler


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From: Wolfgang Stukenbrock <wolfgang.stukenbrock%nagler-company.com@localhost>
To: <pkg-manager%NetBSD.org@localhost>, <gnats-admin%NetBSD.org@localhost>,
        <pkgsrc-bugs%NetBSD.org@localhost>, 
<Wolfgang.Stukenbrock%nagler-company.com@localhost>
Reply-To: <gnats-bugs%NetBSD.org@localhost>
Subject: Re: pkg/48258: mysql-server startup files may try to set to high 
fd-limit in pkgsrc-startup-file
References: <pr-pkg-48258%gnats.netbsd.org@localhost>
  <20131002105744.E5864123B93%test-s0.nagler-company.com@localhost>
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The following reply was made to PR pkg/48258; it has been noted by GNATS.

From: Wolfgang Stukenbrock <wolfgang.stukenbrock%nagler-company.com@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: pkg-manager%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost, 
pkgsrc-bugs%NetBSD.org@localhost
Subject: Re: pkg/48258: mysql-server startup files may try to set to high 
fd-limit in pkgsrc-startup-file
Date: Wed, 02 Oct 2013 14:32:37 +0200

 Hi - OK, I haven't tested that again on NetBSD.
On Solaris ulimit with a to large value will give an error. (tested again in /bin/sh and with setrlimit() for some minutes.) On NetBSD there seems to be (now) the feature that ulimit in /bin/sh and setrlimit() will clamp the parameter passed to the maximum - the hard-limit. So for NetBSD this is working, but for any other system that does not silently clamp the value it doesn't. 
 I'm not shure about the set of OS's that is affected. At least Solaris 8 is.
pkgsrc is for more than "only" NetBSD, so I think it would be better not to "hope" that the system will truncate to the max. 
 Sorry for not explicitly testing on NetBSD prior sending the report.
By The way, I have had this problem with the FD-limit with mysqld in the past, so that I have added some commandline options in my automated DB-setup scripts that are executed during system installation, but I'm not shure about the NetBSD version where I've added this (3.x or 4.x). It is still in there, even it is (perhaps) now no longer needed. And I remember that my main DB-server has crashed when I try to set a larger value as the kernel supports in the DB-server-config file - e.g. when I boot a GENERIC for some reasons - I've increased the hard-limit in the "normal" kernel for this system. That system currently runs NetBSD 4.x. just for information (till now): I'm debugging an other problem with the delivered rc-files for mysql-server 5.5, because the DB-server crashes during startup when started during system startup on NetBSD 6.1. Calling "/etc/rc.d/mysqld start" by hand later will bring the deamon up. (It seems to be either mysql 5.5 related or is a problem with NetBSD 6.1, because mysql 5.1 on NetBSD 5.1.2 does not show this problem on several installations.) Still not found what it is. Without additional debugging inserted the DB-server runs into SEGV after setting up the socket and prior the message that it is now listening in the error log. But when started under ktrace it still does not start, but it now looks like "something" is shutting down the server during startup (no SEGV anymore), but the normal shutdown messages are in the error-log file of the DB-server. Very strange till now ... best regards W. Stukenbrock OBATA Akio wrote: > The following reply was made to PR pkg/48258; it has been noted by GNATS. > > From: "OBATA Akio" <obache%netbsd.org@localhost> 
 > To: gnats-bugs%netbsd.org@localhost
> Cc: > Subject: Re: pkg/48258: mysql-server startup files may try to set to high 
 >  fd-limit in pkgsrc-startup-file
 > Date: Wed, 02 Oct 2013 20:19:35 +0900
> > On Wed, 02 Oct 2013 20:00:00 +0900, <Wolfgang.Stukenbrock%nagler-company.com@localhost> wrote: > > >> How-To-Repeat: 
 >  >     setup a fresh system (e.g. amd64), log in and run "ulimit -Hn". It 
will report 3404.
 >  >     And so setting 4096 in the rc-file will (silently) fail and the 
server will stay at 128 fd's.
> > I cannot reproduce it on NetBSD-5.1.2-i386, soft limit will be up to the hard limit: > > # ulimit -Hn 
 >  3404
 >  # ulimit -Sn
 >  128
 >  # ulimit -n 4096
 >  # ulimit -Hn
 >  3404
 >  # ulimit -Sn
 >  3404
> > -- > OBATA Akio / obache%NetBSD.org@localhost > > > > Received: from DB3PR07MB171.eurprd07.prod.outlook.com (10.242.132.149) by 
 >  DB3PR07MB169.eurprd07.prod.outlook.com (10.242.132.141) with Microsoft SMTP
 >  Server (TLS) id 15.0.775.9 via Mailbox Transport; Wed, 2 Oct 2013 11:25:09
 >  +0000
 > Received: from DB3PR07CA009.eurprd07.prod.outlook.com (10.242.134.49) by
 >  DB3PR07MB171.eurprd07.prod.outlook.com (10.242.132.149) with Microsoft SMTP
 >  Server (TLS) id 15.0.775.9; Wed, 2 Oct 2013 11:25:07 +0000
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 >  SMTP Server (TLS) id 15.0.775.9 via Frontend Transport; Wed, 2 Oct 2013
 >  11:25:07 +0000
 > Received: from e002.nagler-company.com (212.185.86.227) by
 >  AM1FFO11FD017.mail.protection.outlook.com (10.174.64.206) with Microsoft 
SMTP
 >  Server (TLS) id 15.0.785.10 via Frontend Transport; Wed, 2 Oct 2013 11:25:06
 >  +0000
 > Received: from mollari.NetBSD.org (blog.netbsd.org [149.20.53.80])        by
 >  e002.nagler-company.com (8.14.5/8.14.5) with ESMTP id r92BP2js014397     for
 >  <Wolfgang.Stukenbrock%nagler-company.com@localhost>; Wed, 2 Oct 2013 
13:25:06 +0200
 >  (CEST)
 > Received: by mollari.NetBSD.org (Postfix, from userid 31008)      id 
612697100A;
 >  Wed,  2 Oct 2013 11:25:01 +0000 (UTC)
 > From: OBATA Akio <obache%NetBSD.org@localhost>
 > To: <pkg-manager%NetBSD.org@localhost>, <gnats-admin%NetBSD.org@localhost>,
 >   <pkgsrc-bugs%NetBSD.org@localhost>, 
<Wolfgang.Stukenbrock%nagler-company.com@localhost>
 > Reply-To: <gnats-bugs%NetBSD.org@localhost>
 > Subject: Re: pkg/48258: mysql-server startup files may try to set to high
 >  fd-limit in pkgsrc-startup-file
 > References: <pr-pkg-48258%gnats.netbsd.org@localhost>
 >   <20131002105744.E5864123B93%test-s0.nagler-company.com@localhost>
 > X-Gnats-Was-Stupid: no
 > CC:
 > Message-ID: <20131002112501.612697100A%mollari.NetBSD.org@localhost>
 > Date: Wed, 2 Oct 2013 11:25:01 +0000
 > Return-Path: gnats%NetBSD.org@localhost
 > X-MS-Exchange-Organization-MessageDirectionality: Incoming
 > X-Forefront-Antispam-Report: 
CIP:212.185.86.227;CTRY:DE;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(24454002)(189002)(199002)(43066001)(81342001)(47776003)(20776003)(63696002)(47446002)(74662001)(74502001)(16796002)(50466002)(81542001)(6806004)(77982001)(83072001)(46386002)(45336002)(44976005)(52956002)(42186004)(33656001)(51856001)(83322001)(19580405001)(19580395003)(80976001)(74876001)(70486001)(54356001)(47976001)(76482001)(54316002)(50986001)(49866001)(56776001)(4396001)(47736001)(81686001)(79102001)(81816001)(48376002)(74706001)(59766001)(56816003)(76786001)(77096001)(46102001)(76796001)(69226001)(80022001)(65816001)(74366001)(42262001);DIR:INB;SFP:;SCL:1;SRVR:DB3PR07MB171;H:e002.nagler-company.com;CLIP:212.185.86.227;FPR:;RD:e002.nagler-company.com;MX:1;A:1;LANG:en;
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> > The following reply was made to PR pkg/48258; it has been noted by GNATS. > > From: "OBATA Akio" <obache%netbsd.org@localhost> 
 > To: gnats-bugs%netbsd.org@localhost
> Cc: > Subject: Re: pkg/48258: mysql-server startup files may try to set to high 
 >  fd-limit in pkgsrc-startup-file
 > Date: Wed, 02 Oct 2013 20:19:35 +0900
> > On Wed, 02 Oct 2013 20:00:00 +0900, <Wolfgang.Stukenbrock%nagler-company.com@localhost> wrote: > > >> How-To-Repeat: 
 >  >     setup a fresh system (e.g. amd64), log in and run "ulimit -Hn". It 
will report 3404.
 >  >     And so setting 4096 in the rc-file will (silently) fail and the 
server will stay at 128 fd's.
> > I cannot reproduce it on NetBSD-5.1.2-i386, soft limit will be up to the hard limit: > > # ulimit -Hn 
 >  3404
 >  # ulimit -Sn
 >  128
 >  # ulimit -n 4096
 >  # ulimit -Hn
 >  3404
 >  # ulimit -Sn
 >  3404
> > -- > OBATA Akio / obache%NetBSD.org@localhost > > -- Dr. Nagler & Company GmbH 
 Hauptstraße 9
 92253 Schnaittenbach
Tel. +49 9622/71 97-42 
 Fax +49 9622/71 97-50
Wolfgang.Stukenbrock%nagler-company.com@localhost 
 http://www.nagler-company.com
Hauptsitz: Schnaittenbach 
 Handelregister: Amberg HRB
 Gerichtsstand: Amberg
 Steuernummer: 201/118/51825
 USt.-ID-Nummer: DE 273143997
 Geschäftsführer: Dr. Martin Nagler



--


Dr. Nagler & Company GmbH
Hauptstraße 9
92253 Schnaittenbach

Tel. +49 9622/71 97-42
Fax +49 9622/71 97-50

Wolfgang.Stukenbrock%nagler-company.com@localhost
http://www.nagler-company.com


Hauptsitz: Schnaittenbach
Handelregister: Amberg HRB
Gerichtsstand: Amberg
Steuernummer: 201/118/51825
USt.-ID-Nummer: DE 273143997
Geschäftsführer: Dr. Martin Nagler
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