Process flow hangs in state "bussy"

Hi,
We are encountering what seems to be a "random" problem when runing process flows. In about 1 out of 4 runs the flow "hangs" with status "busy"
The technical specs are as follows:
OWB 9.2.0.2.8 on WIN2K Server SP4.
There are two runtime repositories on two different WIN2K database servers (Oracle 9.2.0.4 EE)
The symptoms are as follows:
- We have more than 10 process flows containing from 15 to 60 processes. The problem is not related any single process flow, and occurs on both our target servers.
- The process flows runs OK in approximately 3 out of four runs.
- When the process flows "hangs", one or more of the processes in the process flow also hangs in the "busy" state. The hanging process can be a mapping or an external process
- The processes that have status "busy" have actually finished. They have a completion time set, and in the case where the process sends mail, the mail has been received. In the case of mappings I have verified that the mapping has completed, and that the session performing mapping has terminated.
- When the problem occurs, there is always the same "lock" pattern displaying in OEM:
Username Session IdLockMode HelMode Requ Object Name ROWID Object OwnObject T Resource ID1 Resource ID2
OWBRT92 17TM ROW SHARNONE WB_RT_SERVICE_QUEUE_TAB OWBRT92 TABLE 61161 0
OWBRT92 17UL EXCLUSIVNONE 1073741824 0
OWBRT92 48TM ROW SHARNONE WB_RT_NOTIFY_QUEUE_TAB OWBRT92 TABLE 61145 0
OWBRT92 67TM ROW EXCLNONE WB_RT_NOTIFICATION_COMPONENTS OWBRT92 TABLE 61137 0
OWBRT92 67TM ROW EXCLNONE WB_RT_NOTIFY_QUEUE_TAB OWBRT92 TABLE 61145 0
OWBRT92 67TM ROW EXCLNONE WB_RT_NOTIFICATION_ACKS OWBRT92 TABLE 61141 0
OWBRT92 67TM ROW SHARNONE WB_RT_NOTIFICATION_STREAMS OWBRT92 TABLE 61135 0
OWBRT92 67TM ROW EXCLNONE WB_RT_AUDIT_EXECUTIONS OWBRT92 TABLE 61199 0
OWBRT92 67TX EXCLUSIVNONE 262151 87564
Session 17 is the runtime service, and these two locks are present under normal operation. Session 48 is the Sqlplus session runing the execution template, and session 67 is (i think) the session that is causing the problem.
- The advanced queue WB_RT_NOTIFY_QUEUE tab shows "Number in state ready" equal to the number of processes still in the state "busy" i the process flow.
- When the runtime service is stoped (using the stop_service.sql) The locking sessions disappears.
- When the service is restarted, the processes change status to "bussy recovery" There is now a RPE-01008 and a RPE-01009 message in the "errors" section for the mapping.
- After the failed recovery, everything looks normal, except that there are now twice the number of messages in state READY on the WB_RT_NOTIFICATION_QUEUE. The only way I have found to get rid of these is to delete them from the queue table.
Is this a known problem? We are about to go live in a few weeks, and this could be a serious show stopper if we can't rely on the daily process flows to run as expected.
I could log a TAR on this, but I suspect support would ask for a test case, and Im going to have a hard time providing it for them in this case.

Jean-Pierre,
Thanks for the update. I was afraid this was going to be one of those "hard to pinpoint" issues...
When the problems occurs the Worflow Monitor always shows the task status as "Notified".
The "Main routine" is no longer executing. The session that was executing the mapping has disconnected, and the mapping has completed successfully. (I have verified this by checking the rows in the target tables). Also, the problem is not restricted to mappings. Sometimes it happens to "mail notifications", and in these cases the mail message is received as expected.
It looks to me like there is some kind of synchronization problem between AQ and the controlling process (the runtime access user session) that can arise under a given condition (which I unfortunately have not been able to determine what is). As far as I can tell, the process executing the mapping completes and puts the message that it has completed on the Notify_Queue (hence the messages in stat "Ready" on the queue), but for some reason the process waiting to read the message fails to do so.
As for a test case, I have recently sent an export of our design repository to Igor Machin. Is it possible for you to have a look at that? As I mentioned in the first post, our Process Flows are fairly complex. Some of the flows are executing 50+ mappings in parallel.

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select /*+ FIRST_ROWS(1) */ tab.rowid, tab.msgid, tab.corrid, tab.priority, tab.delay, tab.expiration ,tab.retry_count, tab.exception_qschema, tab.exception_queue, tab.chain_no, tab.local_order_no, tab.enq_time, tab.time_manager_info, tab.state, tab.enq_tid, tab.step_no, tab.sender_name, tab.sender_address, tab.sender_protocol, tab.dequeue_msgid, tab.user_prop, tab.user_data
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Hi,
We are dealing with the same issue. Is this solved yet at your site?
I also note there are lots of records in WB_RT_NOTIFY_QUEUE_TAB. A lot of the AQ$_WB_RT_NOTIFY_QUEUE_TAB_E records are pretty old
Can I just delete them?
SQL> select count(*), Q_NAME from owbsys.WB_RT_NOTIFY_QUEUE_TAB group by Q_NAME;
COUNT(*) Q_NAME
80223 WB_RT_NOTIFY_QUEUE
751129 AQ$_WB_RT_NOTIFY_QUEUE_TAB_E
best regards, Hans

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Sutirtha,
Thank you very much. I really appreciate all of your responses.
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You might want to check to see if you have anything "parallel" running
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--- w ---> END_WARNING
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Oracle10g OWB Client 10.2.0.1.0
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Hello Steve,
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BUT
If I run the same process flow (without modification or even redeployment) with a different parameter , the user defined acivity sucessfully executes (after about 11 minutes or so) but the process flow , doesnt seem to know that it is finished and just says it is still executing.
my "user defined" activity has
COMMAND: /usr/bin/ksh
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RESULT_CODE:
SCRIPT :
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by examining (RUNTIME CONTROL CENTER SCHEMA).all_rt_audit_execution_params
I can see that the variable contents assigned to RESULT_CODE look like this
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(like in Runtime.properties
property.RuntimePlatform.0.NativeExecution.Shell.security_constraint = NATIVE_JAVA
except maybe
.........Nativeexecution.timeout = .....?????
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I have been using OWB (10g r2) for a while and have used "User Defined" activities in production process flows successfully before.
However my problem now is that the activity (shell command) I want to perform, takes more than 10 minutes to complete. If I run the process flow with a parameter that generates a shell command that executes in two or three minutes, the process flow continues past the sucessfully executed user defined activity to the next activity.
BUT
If I run the same process flow (without modification or even redeployment) with a different parameter , the user defined acivity sucessfully executes (after about 11 minutes or so) but the process flow , doesnt seem to know that it is finished and just says it is still executing.
my "user defined" activity has
COMMAND: /usr/bin/ksh
PARAMETER_LIST bound to a variable which is set earlier in the process flow.
RESULT_CODE:
SCRIPT :
SUCESS_THRESHOLD : 0
by examining (RUNTIME CONTROL CENTER SCHEMA).all_rt_audit_execution_params
I can see that the variable contents assigned to RESULT_CODE look like this
'/usr/bin/rsh -n WINSRV1 dtsrun /usa /ppw /S WINSQLSRV /N JOBNAME_SHORT'
or this
'/usr/bin/rsh -n WINSRV1 dtsrun /usa /ppw /S WINSQLSRV /N JOBNAME_LONG'
I put the -n in because I thought that may have been the problem, but I think its more likely that there is come sort of ".properties" in a runtime file that needs to be set to control the "timeout" of user defined activities.
(like in Runtime.properties
property.RuntimePlatform.0.NativeExecution.Shell.security_constraint = NATIVE_JAVA
except maybe
.........Nativeexecution.timeout = .....?????
Has anybody had a problem like this? Found a document describing available configuration properties for PF activites?
Can anyone help?

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Hi,
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Greetings
Christoph
Message was edited by:
ctrierweiler

Hi,
I've had a go.
How should I interpret the results of list_requests:
owner_owr@ORKDEV01> @list_requests
====================
DEPLOYMENTS
====================
Audit ID Status Name Date Owner
2706 READY Deployment Fri Nov 11-NOV-05 10:49:59 OWNER_OWR
11 10:46:37 CET 2
005
====================
DEPLOYMENT UNITS
====================
Audit ID Status Name Date Owner
2707 READY Unit0 11-NOV-05 10:49:59 OWNER_OWR
====================
EXECUTIONS
====================
Er zijn geen rijen geselecteerd.
owner_owr@ORKDEV01>
Whilst a process flow is executing the last query will list executions, all of which have status BUSY:
owner_owr@ORKDEV01> @list_requests
====================
DEPLOYMENTS
====================
Audit ID Status Name Date Owner
2706 READY Deployment Fri Nov 11-NOV-05 10:49:59 OWNER_OWR
11 10:46:37 CET 2
005
====================
DEPLOYMENT UNITS
====================
Audit ID Status Name Date Owner
2707 READY Unit0 11-NOV-05 10:49:59 OWNER_OWR
====================
EXECUTIONS
====================
Audit ID Status Name Date Owner
394512 BUSY PF_ONB01 04-MEI-06 09:11:12 OWNER_OWX
395328 BUSY ONB:FULL_PREPARE 04-MEI-06 09:11:55 OWNER_OWR
395324 BUSY PF_ONB01:ONB 04-MEI-06 09:11:55 OWNER_OWR
owner_owr@ORKDEV01>
As an aside, I will attempt to get rid of the READY deployment and deployment unit using deactive_deployment.sql
Now, if I attempt to use deactivate_execution.sql on any of the executions with status BUSY I get:
owner_owr@ORKDEV01> @deactivate_execution
Voer waarde voor 1 in: 396136
declare
FOUT in regel 1:
.ORA-20003: The object is not in a valid state for the requested operation
ORA-06512: at "OWNER_OWR.WB_RTI_EXCEPTIONS", line 94
ORA-06512: at "OWNER_OWR.WB_RTI_EXECUTION", line 774
ORA-06512: at "OWNER_OWR.WB_RT_EXECUTION", line 90
ORA-06512: at line 4
owner_owr@ORKDEV01>
So all the seems to remain is to use abort_exec_request.sql
This does the job, but the script itself hangs.
I think it has to do with the l_stream_id not being checked again after the initial IF. I think it should probably be part of the loop condition as it is again reset in the do_acks inside the loop.
Cheers & thanks,
Colin

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I gave the below parameters for the External Process
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SUCCESS_THRESHOLD: 0
SCRIPT:
The environment is
Windows 2003
OWB 9.2.0.8
OWF Builder 2.6
When I deploy and execute using Deployment Manager, it gave me the below error
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Is my Parameters correct?
GIve me the link where I can find more on using External process.
Please...please...help me..
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Nikolai,
I have created a simple process flow which only calls the external process. The script is on the same host as the process flow is deployed to.
I have used two diffent values for the command parameter.
1. I placed the full path of the file in the command parameter and left the script parameter blank:
COMMAND: /edwftp/ppas/scripts/ClearPPAS.sh
PARAMETER_LIST:
SUCCESS_THRESHOLD: 0
SCRIPT:
2.I placed the bash command in the command parameter and the full path in the script parameter.
COMMAND: /usr/bin/sh
PARAMETER_LIST:
SUCCESS_THRESHOLD: 0
SCRIPT: /edwftp/ppas/scripts/ClearPPAS.sh
Both of these appear to work as they print out the statements inside the script but the files that are supposed to be removed still remain.
Starting Execution EXTER_FILE
Starting Task EXTER_FILE
Starting Task EXTER_FILE:EXTERNALPROCESS
Removing ActivatedAudit.dat...
Removing ActivatedCustomers.dat...
Removing ActiveAudit.dat...
Removing ActiveCustomers.dat...
Done!
Create the Activated Customers data file...
Create the Active Customers data file...
Done!
WARNING: Log file truncated - see RAB for further information.
/edwftp/ppas/scripts/ActivatedCustomers.sh: /edwftp/ppas/log/ActivatedCustomers.log: cannot create
/edwftp/ppas/scripts/ActiveCustomers.sh: /edwftp/ppas/log/ActiveCustomers.log: cannot create
WARNING: Log file truncated - see RAB for further information.
Completing Task EXTER_FILE:EXTERNALPROCESS
Completing Task EXTER_FILE
Completing Execution EXTER_FILE
The permissions on the /log direcotry are 775. The user I register the file location with owns this directory.
Can't think of anything else I have missed. I really appreciate your help :)
Ryan

Mappings not triggered from Process flow?

Hi,
I have some mappings under a process flow..they are triggered daily but today they were not triggered can anyone tell me how to go about this?

Hi ,
If you have deployed the schedule then it will be in Disable state .
You can check that by logging into SQL*PLUS as the Target user and running
select job_name, state from user_scheduler_jobs;
Use the Schedule tab on the Control Center Jobs panel in the Control Center Manager to schedule
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select job_name, state from user_scheduler_jobs;
The above query will show whether the scheduled job is SCHEDULED, RUNNING or SUCCEEDED.
Thanks,
Sutirtha

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