Server hung, is this a stack trace? Post: 302885788

10 More Discussions You Might Find Interesting

1. Programming

Core file without a readable stack trace

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:

2. Programming

printing a stack trace with backtrace

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++.

3. UNIX for Advanced & Expert Users

help required - stack trace

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...

4. Filesystems, Disks and Memory

get stack trace from C program on Solaris 8

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!

5. Solaris

Need to retrieve stack trace from core using mdb

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...

6. AIX

How to get the stack trace using kdb?

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...

7. Shell Programming and Scripting

Stack Trace

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...

8. UNIX for Dummies Questions & Answers

View User Mode Call Stack of Hung Process

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...

9. Programming

View Stack Trace of different cores

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...

10. Shell Programming and Scripting

Java stack trace parser in awk

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...

LEARN ABOUT CENTOS

savecore

savecore(1M)						  System Administration Commands					      savecore(1M)

NAME

       savecore - save a crash dump of the operating system

SYNOPSIS

       /usr/bin/savecore [-Lvd] [-f dumpfile] [directory]

DESCRIPTION

       The  savecore  utility saves a crash dump of the kernel (assuming that one was made) and writes a reboot message in the shutdown log. It is
       invoked by the dumpadm service each time the system boots.

       savecore saves the crash dump data in the file directory/vmcore.n and the kernel's namelist in directory/unix.n. The  trailing  .n  in  the
       pathnames is replaced by a number which grows every time savecore is run in that directory.

       Before writing out a crash dump, savecore reads a number from the file directory/minfree. This is the minimum number of kilobytes that must
       remain free on the file system containing directory. If after saving the crash dump the file system containing directory  would	have  less
       free  space the number of kilobytes specified in minfree, the crash dump is not saved. if the minfree file does not exist, savecore assumes
       a minfree value of 1 megabyte.

       The savecore utility also logs a reboot message using facility LOG_AUTH (see syslog(3C)). If the system crashed as a  result  of  a  panic,
       savecore logs the panic string too.

OPTIONS

       The following options are supported:

       -d	       Disregard  dump	header valid flag. Force savecore to attempt to save a crash dump even if the header information stored on
		       the dump device indicates the dump has already been saved.

       -f dumpfile     Attempt to save a crash dump from the specified file instead of from the system's current dump device. This option  may	be
		       useful if the information stored on the dump device has been copied to an on-disk file by means of the dd(1M) command.

       -L	       Save  a	crash  dump of the live running Solaris system, without actually rebooting or altering the system in any way. This
		       option forces savecore to save a live snapshot of the system to the dump device, and then immediately to retrieve the  data
		       and  to	write it out to a new set of crash dump files in the specified directory. Live system crash dumps can only be per-
		       formed if you have configured your system to have a dedicated dump device using dumpadm(1M).

		       savecore -L does not suspend the system, so the contents of memory continue to change while the dump is saved.  This  means
		       that live crash dumps are not fully self-consistent.

       -v	       Verbose. Enables verbose error messages from savecore.

OPERANDS

       The following operands are supported:

       directory	       Save  the crash dump files to the specified directory. If directory is not specified, savecore saves the crash dump
			       files to the default savecore directory, configured by dumpadm(1M).

FILES

       directory/vmcore.n

       directory/unix.n

       directory/bounds

       directory/minfree

       /var/crash/'uname -n'	       default crash dump directory

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       adb(1), mdb(1), svcs(1), dd(1M), dumpadm(1M), svcadm(1M), syslog(3C), attributes(5), smf(5)

NOTES

       The system crash dump service is managed by the service management facility, smf(5), under the service identifier:

       svc:/system/dumpadm:default

       Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed  using  svcadm(1M).  The  ser-
       vice's status can be queried using the svcs(1) command.

       If the dump device is also being used as a swap device, you must run savecore very soon after booting, before the swap space containing the
       crash dump is overwritten by programs currently running.

SunOS 5.10							    25 Sep 2004 						      savecore(1M)