[Xymon] Xymon Digest, Vol 117, Issue 7

Fri Oct 16 10:43:36 CEST 2020

I also I got rid of the 500 error using new size,

no error message debugging svcstatus.sh

Best Regards

Marco

Il 13/10/2020 12:12, Herald ten Dam ha scritto:
> I had this issue also and not being a c programmer (and not having a 
> lot of time to figure out) I adjusted the file "svcstatus-trends.c" on 
> line 291:
> Original: SBUF_MALLOC(allrrdlinks,16384)
> New: SBUF_MALLOC(allrrdlinks,163840)
>
> So the buffer value times 10. After this I got rid of the 500 error. 
> So I think the buffer is to little for some environments.
>
> Met vriendelijke groet,
> *Herald ten Dam
> *
> Database Specialist Oracle, Medior z/VM
>
> *ICU IT Services BV*
> Transistorstraat 55b I  1322 CK  ALMERE
> **
> *M* 06 – 28 891 653 I *E *herald.ten.dam at icu-it.nl 
> <mailto:herald.ten.dam at icu-it.nl>
> *T* 088 – 5 234 123 I www.icu-it.nl <http://www.icu-it.nl>I KvK 32135776
>
> ------------------------------------------------------------------------
> *Van:* Xymon <xymon-bounces at xymon.com> namens xymon-request at xymon.com 
> <xymon-request at xymon.com>
> *Verzonden:* dinsdag 13 oktober 2020 12:00
> *Aan:* xymon at xymon.com <xymon at xymon.com>
> *Onderwerp:* Xymon Digest, Vol 117, Issue 7
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>    1. Re: Too much data for svcstatus.sh? (Henrik St?rner)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 12 Oct 2020 16:01:09 +0200
> From: Henrik St?rner <henrik at hswn.dk>
> To: xymon at xymon.com
> Subject: Re: [Xymon] Too much data for svcstatus.sh?
> Message-ID: <46a50f10-4fe1-4990-fa37-4062e8da7921 at hswn.dk>
> Content-Type: text/plain; charset=utf-8
>
> Hi,
>
> the best way to debug this is to get a proper stack trace of when the
> program crashes. For this, you first need to make sure you have a binary
> of svcstatus.cgi which includes debug information - if you look at the
> Xymon sources, the build/Makefile.Linux file has a commented-out line
> setting the CFLAGS variable for debugging:
>
> # Compile flags for debugging
> # CFLAGS = -g -DDEBUG -Wall -D_REENTRANT $(LFSDEF) $(OSDEF)
>
> Uncomment the last line, run "make clean; make" and then use the
> web/svcstatus.cgi binary from that.
>
> To run the program in the gdb debugger, I would bypass the web server
> CGI and run it by hand like this:
>
> $ export SCRIPT_NAME="svcstatus.sh"
> $ export REQUEST_METHOD="GET"
> $ export QUERY_STRING="HOST=claudio.hswn.dk&SERVICE=disk"
> $ gdb ./web/svcstatus.cgi
> (gdb) run
>
> The value for the QUERY_STRING should be taken from the URL for your
> status-page - the part after the '?' sign. The example here is from the
> xymon.com site, but you really just need to modify the hostname to that
> of your own.
>
> Note that you must run it on the Xymon server, because it reads the file
> stored there.
>
>
> Regards,
> Henrik
>
> Den 21.05.2020 kl. 17.47 skrev Mike Burger:
> > Good morning.
> >
> > Running Xymon 4.3.30, compiled from source tarball, on a RHEL 6.10
> > server.
> >
> > This morning, I encountered an interesting issue.
> >
> > I have a monitored system that has 197 discrete filesystems/mounts.
> >
> > When I attempt to enter this server's "Trends" section, I receive an
> > internal server error (500).
> >
> > My httpd error log shows this when I attempt to access the trends link
> > for the server in question:
> >
> > [Thu May 21 11:29:41 2020] [error] [client 10.40.24.55] Premature end
> > of script headers: svcstatus.sh, referer:
> > http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
> > [Thu May 21 11:29:59 2020] [error] [client 10.40.24.55] *** glibc
> > detected *** /apps/xymon/server/bin/svcstatus.cgi: realloc(): invalid
> > next size: 0x0000000000de7dd0 ***, referer:
> > http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
> > [Thu May 21 11:29:59 2020] [error] [client 10.40.24.55]
> > /apps/xymon/server/bin/svcstatus.cgi[0x408a4f], referer:
> > http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
> > [Thu May 21 11:29:59 2020] [error] [client 10.40.24.55]
> > /apps/xymon/server/bin/svcstatus.cgi[0x403453], referer:
> > http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
> > [Thu May 21 11:29:59 2020] [error] [client 10.40.24.55]
> > /apps/xymon/server/bin/svcstatus.cgi[0x404bb7], referer:
> > http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
> > [Thu May 21 11:29:59 2020] [error] [client 10.40.24.55]
> > /apps/xymon/server/bin/svcstatus.cgi[0x4022c9], referer:
> > http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
> > [Thu May 21 11:29:59 2020] [error] [client 10.40.24.55]
> > 00400000-0043c000 r-xp 00000000 fd:08
> > 24906?????????????????????????????
> > /apps/xymon/server/bin/svcstatus.cgi, referer:
> > http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
> > [Thu May 21 11:29:59 2020] [error] [client 10.40.24.55]
> > 0063c000-0063e000 rw-p 0003c000 fd:08
> > 24906?????????????????????????????
> > /apps/xymon/server/bin/svcstatus.cgi, referer:
> > http://sysmon.fhmc.local/xymon/edmprod/edmprod.html
> >
> > This does not happen for any other monitored system in my environment.
> >
> > This system is one of the more critical servers in my environment, so
> > I'd like to figure out what's going on and remediate it if possible.
> >
>
>
>
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