Kill session manually

Hi,
I have a client application use C# to access oracle database. But when the client log out his session on db still exists.. So is there anyway to write a method to kill the session manually.
I mean when the user press the log out button...
thanks in advance.....

ALTER SYSTEM KILL SESSION '7,15';since you can't kill your own session, you have to connect again (one more connection to the DB) to kill this other sesion. Then, again, you have a problem since you have this new connection that you need to kill.
A close call on the connection is all what is required.
SQL> alter system kill session '21,6172' ;
alter system kill session '21,6172'
ERROR at line 1:
ORA-00027: cannot kill current session
SQL>Message was edited by:
Kamal Kishore

Similar Messages

Blue screen on client/must kill session?

About all 3 or 4 month the following problem occurs:
The application starts a simple update on a table with only one row, but without commit, to continue in one transaction. Just now the application crashes (without obvious reason) or the client (a PC with windows XP) even gets a blue screen, but no rollback is performed for this transaction . Thus the updated table of the oracle database is blocked until we kill the session of the PC manually.
The mentioned update is performed dozens or hundreds times every day, and usually it works fine. It is very probably that some users try this update in the same time, thus the second has to wait until the first one has committed the whole transaction. The update is the first statement of the transaction to prevent deadlocks.
I don't know, if the application crash or blue screen of the PC causes the oracle problem or, vice versa, the oracle problem causes the blue screen. But once there were blue screens on two PC's at the same time, so there should be a dependency.
We've checked the log files, but there was no error message for this time. But for another day we've found an error, also just for this update statement:
ORA-12571: TNS:packet writer failure
Cause: An error occurred during a data send.
Now we have several questions:
Why doesn't oracle rollback the transaction, if an application crashes? It isn't a good solution to kill the session manually.
Can a simple update bring oracle in such a state?
Can an oracle error crash the application or even windows XP?

Q: Why doesn't oracle rollback the transaction, if an application crashes? It isn't a good solution to kill the session manually.
A: If ORACLE can get the information, that the client process is dead, than ORACLE can rollback the transaction
Q: Can a simple update bring oracle in such a state?
A: No
Q: Can an oracle error crash the application or even windows XP?
A: It's possible that the application crashs, but not Windows XP. An OS should prevent a client application to stop the OS.
Regards
Marc

Kill session through batch file but with DELAY/SLEEP

respected forum members,
i have a database 9i release 2 on windows server 2003.
as we r working in a territory where load shedding (electricity failure) is big problem intervaly. as users r working so there computer shutdown while they are working when there is power failure.
about 250 sessions are opened in peak hours and i want to kill these sessions.
so i want to write a batch file which kill session but at the same time I WANT TO PUT DELAY IN THE BATCH FILE which delay for 2 seconds after killing 20 sessions.
can any body help me to write such a batch file which delays for 2 seconds after killing 20 sessions. HOW to insert DELAY/SLEEP in batch file.
thanks

I'm not sure I understand the point of this script. If the power fails and the server goes down, obviously all sessions will be killed. If the power fails and the client goes down leaving database sessions, you would generally want to enable dead connection detection or limit the idle time of a session in the profile so that Oracle can automatically kill those sessions. Manually killing sessions should be a last resort.
If you really want to write this sort of script, could the batch file simply call DBMS_LOCK.SLEEP to implement the delay? Or do you literally mean that you only want the delay to come from an operating system call?
Justin

How to kill session in forms

In my application I want to kill session if any user
is idle for 2 minutes.
I am using oracle forms 6i and database oracle 9i

You have to use D2KWutil.pll
In when new form instance write the following code
declare
hWind PLS_INTEGER;
CheckTimer TIMER;
begin
hWind := get_window_property(FORMS_MDI_WINDOW,WINDOW_HANDLE);
Win_API_Session.Timeout_Start_Timer(hWind);
CheckTimer := Create_Timer('CheckTimeout',1000,repeat);
end;
and in when timer expired trigger write the following code
begin
if upper(get_application_property(TIMER_NAME)) = 'CHECKTIMEOUT' then
:timer.t1 := Win_api_session.Timeout_Get_Inactive_Time;
if :timer.t1 > 120 then -- timer is a block and t1 is text item (don't assign a canvas to it, make it invisible)
Win_API_Session.timeout_delete_timer;
exit_form (NO_VALIDATE);
end if;
end if;
end;
hope this helps !!

Urgent-how to run 'alter system kill session 'sid, serial#' in form 6i ?

I want to write a procedure in Form 6i so that user can kill the session by herself.
I know kill session sql is 'alter system kill session 'sid, serial#'', however, I fould that I can only run it it sql plus screen, how can I run it in Form or in Stored procedure?
Urgent....Please!

try using Forms_ddl('alter system......'); in the forms. it will execute the dml statements in the form.
zaibi.

Killed sessions

Hi,
I kill a session with the commands:
select username, sid, serial#, status from v$session where username like 'RION%'
alter system kill session 'sid, serial#'
and if I give again the first select command at the status column appears KILLED. I want not to have KILLED in the status column.
Thank you,
Mihaela

hi all,
As u know you are seeing the status of at v$session view as killed, I wanna confirm that this will exists in two senario.
When a Session is in inactive state and a kill command on that session is issued then the "status" column of v$session will be updated as killed as to indicate/mark as it is killed, and the "server " column will be updated as psuedo. when the user again try to connect to the session user will receive 0ra-00028 error and the entry will be removed from v$session.
Another senario is that the transaction is at its half way, either in commiting or at the roleback stage for that partucular session then also you can find that the v$table is updated as above.
more information, go through the documentation, at the Server Process handling section.
i hope it cleared your confussion,

Kill Session in Oracle 10g

Oracle 10g r2
I killed a session after fetching the sid and serial from the v$session as under
select * from v$session where username='SAM';
alter system kill session '530,7420'
Now the status showed killed.
But again after some time one i query the v$session the status turn to inactive.
Why so?

Yeah Madrid....
Thanks for that.. at the developer side.. they did get session killed.
But actually my doubt here was. that once i killed the session then i go the status as "killed" in the v$session
but less then a minute when i again query the v$session then i see the status aa inactive. This is what is not clear to me.

RAR 5.3 - kill session of another user

how can RAR admin kill session of another user?

Hi Partha,
There is no way out to kill a user's session in RAR, nor in UME. The only place you can kill a user's session is in backend (R/3 side of a particular system) in T-code: SM04->select a particular session of any user-> end session.
Regards,
Gurugobinda

ALTER SYSTEM KILL SESSION privilege

Hi All,
Is there any possibility to use this command from a without having DBA priviileges, what is the privilege to be grantd to the ordinary users to execute ALTER SYSTEM KILL SESSION... statement..
Thanks in advance

The procedure proposed by Rusell would be more or less so:
SQL> create or replace procedure kill_session
2 ( v_sid number, v_serial number )
3 as
4 v_varchar2 varchar2(100);
5 begin
6 execute immediate 'ALTER SYSTEM KILL SESSION '''
7 || v_sid || ',' || v_serial || '''';
8 end;
9 /
Procedure created.
SQL> select username, sid, serial# from v$session;
USERNAME                              SID    SERIAL#
                                      147       5078
SYS                                   148       6161
                                      151       6769
                                      156          1
                                      158          1
                                      159          1
REPOS_OWNER                           161      14502
                                      163          1
                                      164          1
                                      165          1
                                      166          1
USERNAME                              SID    SERIAL#
                                      167          1
                                      168          1
                                      169          1
                                      170          1
15 rows selected.
SQL>
SQL> exec kill_session(161,14502);
PL/SQL procedure successfully completed.
SQL>Joel Pérez
http://otn.oracle.com/experts

Kill session permission without alter system permission?

Syntax to kill session is
ALTER SYSTEM KILL SESSION 'session info';
Is there a way to allow a user to kill his/her own session without granting rights to SYSTEM? I don't want anyone to be able to drop the database, but they need to be able to kill their own session. I've looked everywhere...
Thanks in advance!

Yes, assuming you are using standard definer's rights stored procedures. Only if you specify AUTHID CURRENT_USER when creating the stored procedure will you get an invoker's rights stored procedure, which would run with the privileges of the caller, not of the definer.
Justin

To kill session in one schema from another schema

Hi Team,
I got a problem like a table from one of my schema has been locked. I am getting 'ORA-00054: resource busy and acquire with NOWAIT specified' error when trying to delete rows from that table or even when trying to truncate that table.
Let the table be 'T1' present in schema 'VIEW'
I tried to kill the session which is active for that schema by below query
select sid,serial#,status from v$session where username='VIEW' and STATUS = 'ACTIVE';
alter system kill session '681,2586';
But i couldn't do the above as i don't have DBA privilege for that. But i have DBA privilege for another schema let it be 'ADMIN'
Now how can i kill the session in schema 'VIEW' from schema 'ADMIN'
can any one get me solution.
Thanks in Advance
11081985

I got a problem like a table from one of my schema has been locked. I am getting 'ORA-00054: resource busy and acquire with NOWAIT specified' error when trying to delete rows from that table or even when trying to truncate that table.
Before you do anything why don't you actually find out WHY that table has been locked.
You generally should NOT be killing sessions without knowing what is causing the problem to begin with.
Then you also need to determine if you should use KILL SESSION or instead use DISCONNECT SESSION and well as whether the use of IMMEDIATE is appropriate.
Each of those choices acts differently. Many people use KILL when they should really use DISCONNECT.
See DISCONNECT SESSION Clause and KILL SESSION Clause in the ALTER SESSION chapter of the SQL Language doc
http://docs.oracle.com/cd/E11882_01/server.112/e17118/statements_2014.htm#i2282145

Abend while executing alter system kill session command

I have a ML350 G3 Hp server(Xeon 2.4 Ghz) running oracle 8.1.5 on Novell 5.1. Frequently i have locking problems in my software. So when i tried to kill the active session using alter system kill session 'sid, serial#' my server produce following error:
Fatal Exception (Number 14, cause abend: Page fault running process: orcl_000000fe code executing in module core81.nlm v8.1d at offset +6c490h). Any suggestions.

This forum is for posting feedback about the OTN site.
The best place for your question is probably a Database forum.
There is a list of Database forums here:
http://forums.oracle.com/forums/index.jsp?cat=18

Regarding Alter System Kill Session

Hi Guys,
I have to do db refresh from the build .For this I have to kill the sessions and drop the users and recreate the users with the latest build.As the application is running and there are some idle sessions, I have to kill the sessions and drop the users for that I am using a code as below
DECLARE
v_alt_stmt VARCHAR2(1000) := 'ALTER SYSTEM KILL SESSION ''';
v_kill_stmt VARCHAR2(1000);
CURSOR cur_session IS
SELECT s.type type,
s.sid sid,
s.serial# srl_no,
s.username user_name,
s.PROGRAM prog_name
FROM v$session s JOIN gv$process p ON p.addr = s.paddr and s.type='USER';
BEGIN
EXECUTE IMMEDIATE 'ALTER SYSTEM ENABLE RESTRICTED SESSION';
DBMS_OUTPUT.PUT_LINE('The Session has been put in the restricted mode');
FOR v_cur_ssn IN cur_session
LOOP
BEGIN
v_kill_stmt := v_alt_stmt || v_cur_ssn.sid || ',' || v_cur_ssn.srl_no || '''';
DBMS_OUTPUT.PUT_LINE(v_kill_stmt);
EXECUTE IMMEDIATE v_kill_stmt;
EXCEPTION
WHEN others THEN
-- DBMS_OUTPUT.PUT_LINE('The current sessions sid is ' || v_cur_ssn.sid || ' and the srl no is ' || v_cur_ssn.srl_no || ' can not be killed');
END;
END LOOP;
EXECUTE IMMEDIATE 'ALTER SYSTEM DISABLE RESTRICTED SESSION';
DBMS_OUTPUT.PUT_LINE('The restricted mode of the system has been removed');
END;
But sometimes after killing the sessions there are some os processes are going on,to avoid that I have to use 'ALTER SYSTEM DISCONNECT SESSION ''' and 'MMEDIATE' it is workig fine .
Can Any one tell me the logical difference between kill sessions and disconnect
Any information will be highly appreciated.
Thanks in advance
Prafulla

>
Can Any one tell me the logical difference between kill sessions and disconnect
>
Disconnect can be used to disconnect immediately without waiting for any ongoing transactions to complete and recovers all session resousrces.
Kill rolls back ongoing transactions and partially recovers session resources.
Kill is simiilar to SHUTDOWN IMMEDIATE while disconnect is more like SHUTDOWN ABORT.
See DISCONNECT SESSION Clause in the SQL Language doc
http://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_2013.htm
>
Use the DISCONNECT SESSION clause to disconnect the current session by destroying the dedicated server process (or virtual circuit if the connection was made by way of a Shared Sever).
•The IMMEDIATE setting disconnects the session and recovers the entire session state immediately, without waiting for ongoing transactions to complete.
>
And KILL SESSION in the same doc next section
>
The KILL SESSION clause lets you mark a session as terminated, roll back ongoing transactions, release all session locks, and partially recover session resources.
IMMEDIATE Specify IMMEDIATE to instruct Oracle Database to roll back ongoing transactions, release all session locks, recover the entire session state, and return control to you immediately.

Alter system kill session always gives ORA-00030

Hello
Im writing a tool for oracle and one of its features requires killing user session (Im connecting with JDBC). The database Im testing on is 11.2.0.2.
I find the sid and the serial# without problems, than I issue the "alter system kill session 'x,y' immediate" command.
So far so good, but I always get an ORA-00030 error saying this session cannot be found.
I double check and the session does exist in the database.
Because I want the tool to make the kill, killing via the OS is not an option.
Its doesn't look like a permission problem because it gives the same error even when connected as system.
Whats wrong ? does this kill command work at all ? Whats its limitations ?
Thanks
Guy Shilo
Edited by: user13266377 on Jun 9, 2011 1:15 AM

user13266377 wrote:
Hello
Im writing a tool for oracle and one of its features requires killing user session (Im connecting with JDBC). The database Im testing on is 11.2.0.2.
I find the sid and the serial# without problems, than I issue the "alter system kill session 'x,y' immediate" command.
So far so good, but I always get an ORA-00030 error saying this session cannot be found.
I double check and the session does exist in the database.
Because I want the tool to make the kill, killing via the OS is not an option.
Its doesn't look like a permission problem because it gives the same error even when connected as system.
Whats wrong ? does this kill command work at all ? Whats its limitations ?
Thanks
Guy Shilo
Edited by: user13266377 on Jun 9, 2011 1:15 AMyou cannot kill the session already killed or disconnected from the session.
refer the link:- this may help you to write scripts to kill session using dbms_scheduler
Grant restricted and kill sessions.

Alter System Kill Session Not Working

I'm not certain as to what the problem may be, but the following code does not work in that the session is not being disconnected.
The attempt is to have this trigger kill a user's logon session if the user is attempting to run a program named 'ex_oc.exe'
I've tested the code (getting the values back to the table as expected) and it appears to be working but it doesn't execute.
I've also tried ''ALTER SYSTEM DISCONNECT SESSION'.
Database is 11g.
Any ideas?
Thanks
CREATE OR REPLACE TRIGGER SYS.DENY_MSB_TRIGGER_UPDATEDD
AFTER LOGON ON Database
DECLARE
v_programname varchar2(64);
v_logontime date;
v_process varchar2(24);
v_machine varchar2(64);
v_sid number;
v_serialnum number;
v_username varchar2(30);
v_stmt2run VARCHAR2(327);
cur INTEGER;
ret INTEGER;
v_string VARCHAR2(500);
BEGIN
SELECT PROGRAM, PROCESS, MACHINE, SID, SERIAL#, USERNAME
INTO v_programname, v_process, v_machine, v_sid, v_serialnum, v_username
FROM V$SESSION
WHERE PROGRAM = LOWER('ex_oc.exe');
INSERT INTO SAUDIT.DENYMSB (PROGRAM, PROCESS, MACHINE, SID, SERIALNUM, USERNAME)
VALUES (v_programname, v_process, v_machine, v_sid, v_serialnum, v_username );
v_string := 'ALTER SYSTEM KILL SESSION' || CHR(39)||v_sid||','||v_serialnum|| CHR(39)||' IMMEDIATE';
EXECUTE IMMEDIATE v_string;
END;
Edited by: user12451703 on Jan 14, 2010 8:57 AM
Edited by: user12451703 on Jan 14, 2010 8:58 AM

user12451703 wrote:
I'm not trying to kill my own session.
Trigger written by Sys and running it as a generic user.You completely misunderstand triggers. Same as SP/SF trigger is always executed in invoking session on behalf of trigger owner. Below is a slighly modified version of your trigger that does not allow user U1 to connect by killing user U1 session:
SQL> connect scott as sysdba
Enter password: *****
Connected.
SQL> CREATE OR REPLACE TRIGGER SYS.DENY_MSB_TRIGGER_UPDATEDD
2 AFTER LOGON ON Database
3 DECLARE
4 v_programname varchar2(64);
5 v_logontime date;
6 v_process varchar2(24);
7 v_machine varchar2(64);
8 v_sid number;
9 v_serialnum number;
10 v_username varchar2(30);
11 v_stmt2run VARCHAR2(327);
12 cur INTEGER;
13 ret INTEGER;
14 v_string VARCHAR2(500);
15 BEGIN
16 SELECT PROGRAM, PROCESS, MACHINE, SID, SERIAL#, USERNAME
17 INTO v_programname, v_process, v_machine, v_sid, v_serialnum, v_username
18 FROM V$SESSION where username = 'U1';
19 EXECUTE IMMEDIATE ('ALTER SYSTEM KILL SESSION ''' || v_sid || ',' || v_serialnum || '''');
20 EXCEPTION
21 WHEN OTHERS THEN
22 RAISE_APPLICATION_ERROR(-20001, 'Execution of this program not allowed', TRUE);
23 END;
24 /
Trigger created.
SQL> create user u1 identified by u1
2 /
User created.
SQL> grant create session to u1
2 /
Grant succeeded.
SQL> connect u1/u1
ERROR:
ORA-00604: error occurred at recursive SQL level 1
ORA-20001: Execution of this program not allowed
ORA-06512: at line 20
<font color=red size =2>ORA-00027: cannot kill current session</font>
Warning: You are no longer connected to ORACLE.
SQL>
Also, user not that keen to change the name of the exe.Is cex_soc.exe client side executable? If so what prevents user from renaming it?
SY.

Kill session manually

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