Problem in JAVA PL/SQL Block

Question

Hi all,
I am facing a peculiar problem. I have one JAVA PL/SQL code, which runs a shell script, which indeed fire a zipping command remotely. Here I am providing you the code. Actually it zip some files at application server running from Database Server.
create or replace procedure RC(p_cmd in varchar2)
as
x number;
begin
x := run_cmd(p_cmd);
EXCEPTION
when others then
dbms_output.put_line('WHEN OTHERS '||sqlcode||sqlerrm);
end;
<====This RC is called from a before insert trigger. And value of p_cmd is $ORACLE_BASE/report_compress.sh $REPORT_DIR/<report_file>.
create or replace
function RUN_CMD(p_cmd in varchar2) return number
as
language java
name 'Util.RunThis(java.lang.String) return integer';
create or replace and compile
java source named "Util"
as
import java.io.*;
import java.lang.*;
public class Util extends Object
public static int RunThis(String args)
Runtime rt = Runtime.getRuntime();
int rc = -1;
try
Process p = rt.exec(args);
int bufSize = 4096;
BufferedInputStream bis =
new BufferedInputStream(p.getInputStream(), bufSize);
int len;
byte buffer[] = new byte[bufSize];
// Echo back what the program spit out
while ((len = bis.read(buffer, 0, bufSize)) != -1)
System.out.write(buffer, 0, len);
rc = p.waitFor();
catch (Exception e)
e.printStackTrace();
rc = -1;
finally
return rc;
And also I have executed:
BEGIN
dbms_java.grant_permission('<DB_USER>','java.io.FilePermission','$ORACLE_BASE','write');
dbms_java.grant_permission('<DB_USER>','java.io.FilePermission','$ORACLE_BASE/report_compress.sh','execute');
dbms_java.grant_permission('<DB_USER>','java.lang.RuntimePermission','*', 'writeFileDescriptor' );
END;
REPORT_COMPRESS.SH
#!/bin/sh
remsh <APPLICATION SERVER IP> -l <APPLICATION_SERVER_OS_USER> -n "gzip -f $1"
Now problem is while execute RC, it gives no error but the remote file does not get zipped. When I run report_compress.sh from command promt, it works fine.
Earlier we used HP-UX as our DB server and Application Server. And RC worked fine there. Recently we have moved to AIX(for both DB and AS), and now we are facing this problem.
Please guide me to resolve this problem.
Note: .rhosts entry is fine in both the servers(as per me) as report_compress.sh is working fine.

Answer 1

Make sure that the .profile does not read something from tty - it should not, but it sounds like the .profile is expecting tty input.
Alternatively, simply copy and paste the environment settings from .profile to your compress script. The only read important setting is PATH as your script simply does a remote shell. Thus LD_LIBRARY_PATH/SHLIB_PATH and other settings are not needed.
You can also add debugging to your shell script - useful when executing it in the background.
Something as follows:
# create debug file name
DEBUGFILE=/tmp/~$$.debug-out # e.g. /tmp/~1234.debug-out where 1234 is the PID
echo "`date` Starting [$0] with parameters [$*]" >> $DEBUGFILE
# sourcing environment
echo "Loading default profile..." >>$DEBUGFILE
. /home/oracle/.profile 1>>$DEBUGFILE 2>>$DEBUGFILE
# running remote shell
echo "Running remote shell..." >>$DEBUGFILE
remsh ... 1>>$DEBUGFILE 2>>$DEBUGFILE
.. etc.
When this is working, you can remove the debug file from the shell script, or simply delete it when the script is successful.