Our Red Hat server hung yesterday, and I managed to log into the console and see the following message:
I had to reset the server, as I couldnt ping, or get a prompt, and the above is pretty much all we have to go on. I can't find anything meaningful in /var/log/messages or dmesg. Any ideas what the above output is, or what it indicates?
I am using gdb to examine a core file but the output contains only the method addresses in hex.
Is there anyway to translate these addresses to a human-readable form? :confused: (0 Replies)
I am trying to print a stack trace programatically using backtrace and backtrace_symbols.
The problem is that the stack being printed in a mangled format. Is there a way to get the output in more of a human readable form?
I am using Red Hat and the program is written in c++. (2 Replies)
Hi all,
One of our programs written in Java, produced this logfile. This job runs 48 threads and only one thread failed with this error. The code is a blackbox(external product), so cant look at the source code. From what I can infer from the log, the job was trying to write the log messages into... (9 Replies)
I'm on solaris 8. I need to check the stack trace inside my C program. I don't have printstack or walkstack. I tested getcontext and it works. But how do I get the symbols from "stack_t" ? Help please. Many thanks! (4 Replies)
Hello ,
I use Solaris 5.10 . I have huge core file , 48 GB , resulted from an application that was running and got crashed with SIGSEGV.
On my system only mdb works. Please help me to retrieve the stack trace from this core file.
I am novice to mdb and its nuaunces. Please help me with... (2 Replies)
Hi All,
I am trying to debug my core file using kdb.
When I try to get the stack trace I am facing this error.
core mapped from @ 700000000000000 to @ 70000000306fc04
Preserving 1680415 bytes of symbol table
Dump does not start with valid magic number
WARNING: Possibly truncated or... (2 Replies)
Hi All
Thought it would be kind of fun to implement a stack trace for a shell script that calls functions within a sub shell. This is for bash under Linux and probably not portable -
#! /bin/bash
error_exit()
{
echo "======================="
echo $1
echo... (4 Replies)
I have a multithreaded usermode program(actually a daemon) which is in hanged state.
To debug it I tried attaching the process to gdb, but the gdb hangs.
gstack also gets hanged.
I peeped into the proc file system and saw the process to be in sleeping state.
/proc/sysrq-trigger I guess... (1 Reply)
I have a C program which is running as daemon and has some threads.
The program is running on dual core cpu and it may happen that different threads may run on different cpu core.
The problem is sometimes it crashes with some heap memory corruption probably between threads.
GDB command(t a a... (2 Replies)
I want the developers to get a mail with Java stack traces on a daily bases. When something is flaged as known issue and will get a fix but mean while this does not need to get sent each dayl. This is what I got so far. It's a bash script that runs some AWK in it.
To get the files that needs to... (6 Replies)
Discussion started by: chipmunken
6 Replies
LEARN ABOUT CENTOS
spacewalk-channel
SPACEWALK-CHANNEL(8) Red Hat, Inc. SPACEWALK-CHANNEL(8)NAME
spacewalk-channel - Subscribe to or unsubscribe system from channel.
SYNOPSIS
spacewalk-channel [options]
DESCRIPTION
spacewalk-channel allows you to subscribe to and unsubscribe from specified channels via the command line. A visit to the "Spacewalk
Server", "Red Hat Satellite" or "Red Hat Network Classic" website isn't required.
OPTIONS -l, --list
Print a list of channel(s) that you are currently subscribed to.
-b, --base
Print a base channel that you are currently subscribed to.
-L, --available-channels
Print a list of all available child channels.
-a, --add
You are subscribing system to given channel(s). You have to specify --user and --password.
-r, --remove
You are unsubscribing system to given channel(s). You have to specify --user and --password.
-u, --user
Your username used to register the system with and for Red Hat Network Classic, Red Hat Satellite or Spacewalk. If you do not enter
this option and it is required, you will be prompted.
-p, --password
The password associated with the username specified with the --user option. This is an unencrypted password. If you do not enter
this option and it is required, you will be prompted.
-c, --channel
Label of channel you want to subscribe to or unsubscribe from. Can be specified multiple times.
-v, --verbose
Print out successfull action.
-h, --help
Show a help message and exit.
NOTE
The addition and removal of channels is mutually exclusive, please use the command twice.
EXAMPLES
Subscribe to two channels:
spacewalk-channel --add -c rhn-tools-rhel-i386-server-5 -c rhel-i386-server-vt-5 --user username --password password
Unsubscribe from channel:
spacewalk-channel --remove -c rhn-tools-rhel-i386-server-5 -c rhel-i386-server-vt-5 --user username --password password
List subscribed channels:
spacewalk-channel --list
SEE ALSO rhnplugin(8), rhn_register(8), up2date(5).
AUTHORS
Miroslav Suchy <msuchy@redhat.com>
BUGS
Report bugs to <http://bugzilla.redhat.com>.
COPYRIGHT
Copyright (C) 2009-2010 Red Hat, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
Linux 2010 August 30 SPACEWALK-CHANNEL(8)