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tbepa Process Terminates When Using cepa_control in AIX Environment

Document Type | Troubleshooting 

Category | Monitoring/Inspection

Applicable Product Versions | 6FS06, 6FS07, 6FS07PS, 7FS01, 7FS02, 7FS02PS

Document Number | TMOTS002

 

Issue

When attempting to collect a dump using cepa_control for analysis of the tbepa process in an AIX environment, the dump is not created and the tbepa process terminates (is killed).
 
$ ps -ef | grep 34931580 
   tibero 34931580        1   0 11:14:07      -  0:00 tbepa 48 1 180
   
$ cepa_control -l 5 -p 34931580 
Log level change request was set.
Sent a request to tbepa(34931580)


$ ps -ef | grep 34931580
 *tbepa process not found, killed after running cepa_control


SQL> select ext_find_max(10,20) from dual ; 
TBR-2131: Generic I/O error.
 *The session connected to the tbepa process is terminated

 

Cause

When cepa_control is executed, it sends a sigusr1 signal to the tbepa process to change the log level or generate a memory dump. However, the cepa_control script is hardcoded to use kill -10 based on Linux, and in the AIX environment, kill -10 acts as a sigbus signal causing the process to terminate.

 

Solutions

Modify the hardcoded part to send SIGUSR1. (Applied patch: 326862)
Caution
Apply the patch through technical support provided by TmaxTibero.
Note
In AIX or SunOS environments, modify the line 'kill -10 $EPA_PID' to 'kill -s SIGUSR1 $EPA_PID' in $TB_HOME/client/bin/cepa_control.
$ vi $TB_HOME/client/bin/cepa_control

...omitted
    # Send a signal. Signo(10) is SIGUSR1
    # kill -10 $EPA_PID
    kill -s SIGUSR1 $EPA_PID
    echo "Sent a request to tbepa($EPA_PID)"
...omitted
 
 
 

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