How to collect gdb stack trace from a SpectroSERVER core dump on Linux

Products

• CA Spectrum
• DX NetOps

Issue/Introduction

How to collect gdb stack trace from a SpectroSERVER core dump on Linux

Resolution

Please install the Linux GNU GDB Debugger on the system, if not already installed, by running the following command as the root user:

yum install gdb
 
Please  provide the "where",  "info threads" and "thread apply all bt full" from the GDB output.

1 - Login, su or sudo to the root user

2. cd to the $SPECROOT/SS directory and enter the following commands where <CORE> is the filename of the core file:

echo `date` >> output.txt ; echo "where output" >> gdb.output

gdb -ex "where" -ex "quit" /app/spectrum/SS/SpectroSERVER <CORE> >> gdb.output

echo "info threads output" >> gdb.output

gdb -ex "info threads" -ex "quit" /app/spectrum/SS/SpectroSERVER <CORE> >> gdb.output

echo "thread apply all bt full output" >> gdb.output

gdb -ex "thread apply all bt full" -ex "quit" /app/spectrum/SS/SpectroSERVER <CORE> >> gdb.output

3 - Upload the gdb.output file to the case for analysis.

Additional Information

a) As root, cd to the $SPECROOT/SS directory

b) If the file in the SS directory has not been renamed, rename the core
file to something other than core so what if mdb crashes it will not
overwrite the core file (ie. mv core core.1)

c) Execute the following and a few lines of data will print to the screen:

d) gdb SpectroSERVER <core_file>
Example: gdb SpectroSERVER core.1000

Type the following to redirect the output to a text file (gdb.txt)
(gdb) set logging on

You can tell it which file to use:
(gdb) set logging file my_god_object.log

And you can examine the current logging configuration:
(gdb) show logging

e) Type "where" (without the quotes) and hit enter

f) Several lines of data (the contents of the stack) will print out

g) Type "info threads" (without the quotes) and hit enter

h) Several lines of data (the contents of the stack) will print out

i) Type "thread apply all bt full" (without the quotes) and hit enter

j) Type $Q to quit out of gdb

k) Upload the $SPECROOT/SS/gdb.txt file.