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Full Discussion: Control not returning to UNIX when sqlplus is executed in while loop of shell script
Top Forums UNIX for Beginners Questions & Answers Control not returning to UNIX when sqlplus is executed in while loop of shell script Post 303045804 by preetham30 on Monday 13th of April 2020 09:01:15 PM
Old 04-13-2020
Control not returning to UNIX when sqlplus is executed in while loop of shell script
Hi All,

I have observed some of the scripts gets stuck because sqlplus session is not completing it's session. This behavior is intermittent. I will give one of the scenario. Below is the code which executes one sql query.



Code:
exec_SQL()
{
   sql_Stmt=$1
   
   sql_Type=`echo $sql_Stmt | awk -F " " '{ printf toupper($1) }'`

   E_WLM_SQL_RESULT=`sqlplus -s /@${E_WLM_DB} <<!
      set pagesize 0 feedback off verify off heading off echo on
      whenever SQLERROR exit SQL.SQLCODE
      whenever OSERROR exit 9
      $sql_Stmt;
      commit;
   !`

   sql_RC=$?

   if [[ $sql_RC -eq 0 ]]; then
 
      str_Result=`echo $E_WLM_SQL_RESULT | grep SP2`  
  
      if [[ ${#str_Result} > 0 ]]; then
         sql_RC=57      # SQL Error
         sql_Code=0 
      else
         export E_WLM_SQL_RESULT
      fi
   else
      sql_Code=$sql_RC   # Store SQL.SQLCODE before overwriting
 
      if [[ $sql_RC -eq 9 ]]; then   # OSERROR
         sql_RC=91     
      else
         case $sql_Type in 
            INSERT) sql_RC=52 ;;
            UPDATE) sql_RC=53 ;;
            SELECT) sql_RC=54 ;;
            DELETE) sql_RC=56 ;;
            *) sql_RC=57 ;;
         esac
      fi
   fi
 
   if [[ $sql_RC -ne 0 ]]; then
      Log "Error in executing SQL Statement: $sql_Stmt "
      Log "SQL.SQLCODE=$sql_Code"
      Log "=====================================   ORACLE ERROR DESCRIPTION  ====================================="  
      Log "$E_WLM_SQL_RESULT"
      Log "======================================================================================================="
      Log "Returning with $sql_RC"

   fi
  
   return $sql_RC 
}



below is the unix session.
pwlm 8297 8290 0 00:16 ? 00:00:03 /bin/ksh -a /opt/XWLMLL02
pwlm 29121 8297 0 00:32 ? 00:00:00 sqlplus -s

The script has run a process internally and above code part is to monitor whether the process is completed. Even though the process is completed, the script has not moved further from this point. Upon checking further, I have seen one active sqlplus session. I suspect that the sqlplus session is from the above code and it is somehow stuck in turn the script has stuck.

I have observed this similar issue 3 times till now in the past 7 days. But, it is for different scripts. The logic remains the same.

This script was working fine in our old infrastructure where there was AIX server. We have not at all faced this issue over there.



Anyone, could help me to resolve the issue?

Thanks in Advance.
Last edited by preetham30; 04-15-2020 at 10:23 AM..
 

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LEARN ABOUT SUSE

xsession.options

Xsession.options(5)						File Formats Manual					       Xsession.options(5)

NAME

       Xsession.options - configuration options for Xsession(5)

DESCRIPTION

       /etc/X11/Xsession.options  contains a set of flags that determine some of the behavior of the Xsession(5) Bourne shell (sh(1)) script.  See
       the Xsession(5) manpage for further information.

       Xsession.options may contain comments, which begin with a hash mark ('#') and end at the next newline, just like comments in shell scripts.
       The  rest  of  the  file consists of options which are expressed as words separated by hyphens, with only one option per line.  Options are
       enabled by simply placing them in the file; they are disabled by prefixing the option name with 'no-'.

       Available options are:

       allow-failsafe
	      If the 'failsafe' argument is passed to the Xsession script, an emergency X session is  invoked,	consisting  of	only  an  x-termi-
	      nal-emulator(1)  in  the	upper-left hand corner of the screen.  No window manager is started.  If an x-terminal-emulator program is
	      not available, the session exits immediately.

       allow-user-resources
	      If users have a file called .Xresources in their home directories, these resources will be merged with the default X resources  when
	      they log in.

       allow-user-xsession
	      If users have an executable file called .xsession in their home directories, it can be used as the startup program for the X session
	      (see Xsession(5)).  If the file is present but not executable, it may still be used, but is assumed to be a Bourne shell script, and
	      executed with sh(1).

       use-session-dbus
	      If the dbus package is installed, the session bus will be activated at X session launch.

       use-ssh-agent
	      If  the  ssh-agent(1)  program  is  available  and  no agent process appears to be running already, the X session will be invoked by
	      exec'ing ssh-agent with the startup command, instead of the startup command directly.

       All of the above options are enabled by default.  Additional options may be supported by the local  administrator.   Xsession(5)  describes
       how this is accomplished.

AUTHORS

       Stephen Early, Mark Eichin, and Branden Robinson developed Debian's X session handling scripts.	Branden Robinson wrote this manual page.

SEE ALSO

       Xsession(5), ssh-agent(1), x-terminal-emulator(1)

Debian Project							    2004-10-31						       Xsession.options(5)
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