How to clear cache for a specific component in R12?

Posted on November 11, 2008. Filed under: Apps Technology Stack, Configuration, DBA/Admin Tips, Diagnostics, R12, Technology, TroubleShooting | Tags: , , , , |

As we all know the normal tendency for clearing cache in Oracle Apps is to delete the $COMMON_TOP/_pages directory. In 11i, after deleting we dont have to recompile the jsps but in R12 we have to recompile the pages since s_jsp_main_mode is set to justrun by default which is in turn updated in orion-web.xml. Click here for more info.

Ok coming to this post, how can i clear cache for a specific component of Oracle Apps R12 viz., iprocurement, istore etc., Is this even possible ? Yes it is and this option comes handy when somebody modifies a jsp page which is part of say istore, then it makes sense to clear cache for istore and not for the whole server.

Clearing cache for specific Component/Application in R12

Login as sysadmin
Select “Functional Administrator” responsibility
Go to Core Services ==> Caching Framework ==> Tuning
Query the application (for example iStore) or by Name or code.
Select the component and clear the cache.

Note: For some specific configuration changes, we need to bounce Apache also.

Clearing Global Cache in R12

a) Go to Functional Administrator Responsibility
b) Go to Core Services ==> Caching Framework
c) Go to Global configuration and clear all the cache from there.(Only If you want to clear all the  cache)

Hope this helps…..


About Sam: Sam is a guest author for this blog and had performed various installations & upgrades. He is well versed with tech stack components and applications maintenance. He can be contacted at

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How to associate / map / include / exclude a concurrent program to / from a specific concurrent manager in 11i & R12?

Posted on October 14, 2008. Filed under: Configuration, DBA/Admin Tips, R12 | Tags: , , , , , , |

Depending on the business need, at times we might have to exclude / include a concurrent program from/to a specific concurrent manager. Say for example you have created a custom concurrent queue (CCQ) and custom concurrent program (CCP) and you want the CCP to be run only through the CCQ and not through the Standard Manager.

Login as sysadmin
System Administrator -> Concurrent : Manager -> Define
Press F11 and Search for the CCP
Click on Specialization Rules
Goto the last record and press down arrow (this will add a new row)
Select Include for Include / Exclude Column
Select Program for Type
Select appropriate application type for Application
Select the CCP for Name
Click on floppy icon (to save)

Apart from including to the CCQ, lets also exclude from Standard Manager

Press F11 and Search for the Standard Manager
Click on Specialization Rules
Verify if you already have a row for the CCP (Most probably you will not have one, because the default concurrent queue is always Standard Manager. If in case you have a row for the CCP, perform below steps without adding a new row or Goto the last record and press down arrow (this will add a new row)
Select Exclude for Include / Exclude Column
Select Program for Type
Select appropriate application type for Application
Select the CCP for Name
Click on floppy icon (to save)

Above steps can also be used on PCP setups, wherein you want to run a concurrent program only on one of the CM nodes and not on the other. The needs might differ between organizations but the method to exclude / include remains the same.


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How to configure Workflow Mailer in 11i & R12

Posted on October 9, 2008. Filed under: Configuration, DBA/Admin Tips, R12, Workflow Mailer | Tags: , , , , |

One of the simple configuration in Oracle Apps is the Java Workflow Mailer configuration. The steps are simple but the key point is verifying and validation the pre-reqs before proceeding with the configuration. This post had been divided into two parts 1) Pre-reqs validation and 2) Workflow Mailer configuration.

Pre-reqs validation include SMTP & IMAP server access, dedicated email id and folders creation.

You can download the document here.


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httpd: bad group name dba

Posted on October 1, 2008. Filed under: Configuration, DBA/Admin Tips, Operating System, R12, SOA, Technology, TroubleShooting | Tags: , , , |

All were working fine on our SOA server untill we restarted the services. All the custom oc4j components came up fine except the HTTP component.

Below is the error in opmn/logs/HTTP_Server~1.log

apachectl startssl: execing httpd
httpd: bad group name dba

Executing the id command for the SOA owner returned

$ id
uid=5352(username_masked) gid=500()

Note the blank open and closed brackets next to 500.

The root cause of the problem was read access on file /etc/group had been revoked by the root user.
$ ls -l /etc/group
-r–r—–   1 root       3              955 Oct  1 06:36 /etc/group

Both username and group information is stored in the httpd.conf. This file is read everytime you start apache. Since there was no read access to the /etc/group file and also no group information available for the SOA owner httpd service failed to start.

After granting read access to everyone, the services came up fine.

Above solution not only holds good to SOA but also to any Oracle product which uses apache viz., Oracle Apps, Oracle 10gAS.


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How to route / send all workflow mailer notifications to a single email id / address ?

Posted on September 12, 2008. Filed under: Clone, Configuration, DBA/Admin Tips, R12, Workflow Mailer | Tags: , , , |

Mostly, this option will come handy after a clone, wherein you want to retain all the production / source instance data and continue to run workflow mailer but without sending emails to the real end users.

To achieve this you can set an Override address to route all the notifications to a single email address.


1. Login as sysadmin
2. Select System Administration Responsibility
3. Click Workflow under Oracle Applications Manager
4. Click on the tick mark or page icon next to Notification Mailers
5. Click on Workflow Notification Mailer under Name column
6. Click “Set Override Address” button next to Test Mailer button
7. Key in the new email address and click submit.

After submitting, Java mailer will send a verification email to the mentioned email address with a verification code and link to activate the override entry.

Either you can request the email id owner to send you the email with the verification code so that you can key-in the code or if the email address owner has access to Oracle Apps, he/she can click the link and enter the verification code.


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Blank AppsLogin / AppsLocalLogin Page in R12?

Posted on September 12, 2008. Filed under: Apps Technology Stack, Configuration, Diagnostics, R12, TroubleShooting | Tags: , , , |

There were quite a few times i had encountered this blank page issue and the root cause was not the same all the times. There are many reasons for this issue to occur. Listed below are some of them.

Scenario 1: After a clone

Solution :

1. stopall — to shutdown opmn managed services viz., opmn, forms, oacore & oc4j
2. cd $COMMON_TOP/_pages
3. mv _pages _pages_old
4. cd $FND_TOP/patch/115/bin or export PATH=$FND_TOP/patch/115/bin:$PATH
5. Compile all jsps.

perl –compile –flush -p 2

(-p represents parallel threads, if you have enough horse power on your server, you can increase it to 8 or 10)

6. startall

Scenario 2: Database Listener is down

Solution: Obvious answer, start the database listener.

Scenario 3: Database Archive Locaion is 100% full

Solution: Either temporarily move the archive files to another location or delete older archive files (provided you had taken a cold backup sometime).

Scenario 4: IAS Cache initialization failed

This issue occurs only if you have more than one mid-tier and you had enabled Distributed Java Caching.

Error Message in log file:

Exception in static block of jtf.cache.CacheManager. Stack trace is: oracle.apps.jtf.base.resources.FrameworkException:
IAS Cache initialization failed.
The Distributed Caching System failed to initialize on port: 12357.
The list of hosts in the distributed caching system is: [node 1] [node 2].
The port [port no] should be free on each host running the JVMs.
at oracle.apps.jtf.cache.IASCacheProvider.init(
at oracle.apps.jtf.cache.CacheManager.activateCache(

In this scenario, s_java_object_cache_port value was listening on node 2 but not on node 1. So whichever connection went to node 1 it returned a blank page and occasionally it displayed 500 Internal Server error.



1) Bring down opmn services on both the boxes.
2) Verify no process is listening for s_java_object_cache_port value. click here to view the commands.
2) Change s_java_object_cache_port on all the nodes in the context file
3) Run autoconfig


s_java_object_cache_port value is referrenced in two places

1) $INST_TOP/ora/10.1.3/javacache/admin/javacache.xml
2) Profile option name JTF_DIST_CACHE_PORT

Change the port value to a new number and bounce opmnctl services. Dont forget to change it in $CONTEXT_FILE. (To take effect during next autoconfig)


Use commands listed in step 2 of autoconfig option.

If the new port mentioned still doesnt listen on the boxes you can use below workaround. This workaround will resolve the “IAS Cache initialization failed” even if the port is not listening.


Set LONG_RUNNING_JVM=false in $INST_TOP/ora/10.1.3/j2ee/oacore/config/
Bounce opmn services.

In 11i, if the database listener is down or if the archive location is full, atleast we get the internal server page while trying to access the login page, but in R12 nothing happens except for the blank page and apache error log will have an entry “oc4j_socket_recvfull timed out” with additional error message mod_oc4j: request to OC4J [mid-tier servername:ajp port] failed: Connect failed

So the moral of the story is recompiling the jsps is not always the solution if you get a blank login page.


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How to change Java heap size in R12 to avoid java.lang.OutOfMemoryError: Java heap space error?

Posted on September 11, 2008. Filed under: Apps Technology Stack, Configuration, Diagnostics, Operating System, R12, Technology, TroubleShooting | Tags: , , , , |

Recently we had encountered a situation, wherein end users where not able to get the R12 login page and
it just hangs, but all the opmn processess were up and running – status gives status as
alive for all the components viz., HTTP, oafm, oacore & forms. The same environment was available and
end users were able to access without any isuses 15 minutes before. This error happens only when
multiple people login to the same page and perform simillar activity like employee self service form
etc. So where and what exactly could be the problem.

This is how we approached and resolved the issue.

First we checked apache error log. The following error was reported in the error log.

[warn] [client IP Address ] oc4j_socket_recvfull timed out
[error] [client IP Address ] mod_oc4j: There is no oc4j process (for destination: application://oacore) available to service request.
[error] [client  IP Address] mod_oc4j: request to OC4J [servername:OC4J AJP Port Range for Oacore]
failed: Connect failed

Above error message does give us a hint that the problem is with oacore, but as i said earlier the oacore is alive according to opmn.

Next, we verified the oacore log file.


Error Message in the file

Exception in thread “OC4JMonitorThread” java.lang.OutOfMemoryError: Java heap space

While checking the error in file, parallely we opened another window to see the CPU and memory usage and we could see one java process was taking more than 100% CPU. This process was spawned by the opmn -d process and the process id didnt match with the oacore process id. Hint: status will give the status as well the process id. It looked like a end client java process.

At this stage we had 3 options.

1. Kill the java process which is consuming high cpu.
2. Bounce oacore component
3. Adjust java (jvm) memory parameters

Each of the above options has its own implications and advantages. To minimize the downtime we decided  to kill the java processes, and the moment we killed the java process, all the browsers which were hanging reported instantaneously Internal Server Error. This proved to be a bad decision.

So we moved to the next option, bouncing the oacore service which we are sure will resolve the issue  (temporarily) and it did as expected. Basically when you bounce the services all the existing
connections and processess will be released which results in more available memory when you re-start the services.

Ok, now we tackled the problem and provided a temporary solution but we need to find a long term solution. This is option 3, adjusting java memory size.

Steps to change the heap size.

First, you need to identify how much is the maximum heap size that you can set. Click here.

Once you had identified the maximum heap size, we need to change the configuration files to make it

Step 1: Edit opmn.xml file.

Location : $INST_TOP/ora/10.1.3/opmn/conf/

Open opmn.xml

Search for string Xms or Xmx or module-id=”OC4J”

This search should lead you to below location

‘<‘process-type id=”oacore” module-id=”OC4J” status=”enabled” working-dir=”$ORACLE_HOME/j2ee/home”‘>’
‘<‘category id=”start-parameters”‘>’
‘<‘data id=”java-options” value=”-server -verbose:gc -Xmx512M -Xms128M ……]

The default value for Maximum (-Xmx) and Minimum (-Xms) heap sizes are 512M and 128M respectively.

Again here you have options, you can set both Xms and Xmx has the same value as Xmx if you feel all your sessoins require higher memory or set a lower value for Xms and the maximum value for Xmx. Dont forget to change the values under ‘<‘category id=”stop-parameters”‘>’

opmn.xml also contains jvm configurations for other components – oafm & forms.

Step 2: Edit file.

Location : ($INST_TOP/ora/10.1.3/j2ee/oacore/config)

This step is optional since we had already made changes in opmn.xml but there is no harm in making the change here. This step will come handy for troubleshooting specific components of Oracle viz., configurator, iSupplier or any other option which heavily utilizes/consumes CPU/memory.

Search for string Xms or Xmx or wrapper.

Option 1: If you find any of the above parameters change the values corresponding to the value you had  mentioned in opmn.xml or even more than that, as long as you dont exceed the maximum heap size limit.

Option 2: If you DO NOT find any of the above parameters, then make an entry like this, under the heading “# Java Object Cache Configuration Parameters”

wrapper.bin.parameters=-Xms[Value]M -Xmx[Value]M -XX:NewSize=256M -XX:MaxNewSize=256M

Step 3: Edit Applications Context file


Location: $INST_TOP/appl/admin/SID_hostname.xml

search for string s_oacore_jvm_start_options

Change Xms and Xmx value. Repeat the same step for parameter s_oacore_jvm_stop_options.

Changes made in Step 3 will take effect the next time you run autoconfig, whereas Step 1 & 2 changes will take effect the next time you bounce opmn services, but the values are not permanent in the sense these will be wiped off next time you run autoconfig. Yes you can preserve the changes by placing it inbetween Begin and End customizations.

You can also increase the Garbage Collection threads parameter (-XX:ParallelGCThreads) to a higher value if you have JDK 1.5 or more than 2 cpus or more memory. For more information on this you can refer to Metalink Note: 362851 – Guidelines to setup the JVM in Apps Ebusiness Suite 11i and R12.


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How to identify/determine the maximum JVM Heap Size for OC4j components in R12 / 10gAS

Posted on September 11, 2008. Filed under: Apps Technology Stack, Configuration, Operating System, R12, TroubleShooting | Tags: , , , , , , |

Below command will help you to identify the maximum memory heap size than can be allocated to a JVM

java -mx[value]m -version

Start with a higher value like 4G or higher and slowly cut down to the maximum allowed value.


$ java -mx4096m -version

Invalid maximum heap size: -Xmx4096m
The specified size exceeds the maximum representable size.
Could not create the Java virtual machine.

As you can see my system cant support 4Gig for a JVM.

Now lets reduce to a lesser value, viz., 3Gig

$ java -mx3072m -version
java version “”
Java(TM) 2 Runtime Environment, Standard Edition (build
Java HotSpot(TM) Server VM (build jinteg:07.27.06-16:18 IA64, mixed mode)

Now its clear that the maximum allowed value is 3gig.


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Missing Libraries during Post Clone Stage (

Posted on August 12, 2008. Filed under: Clone, Configuration, R12, Uncategorized | Tags: , , |

We recently faced this interesting issue during the post clone stage. All the .a and .o library files were removed during execution of which ultimately results in relinking errors of forms and reports … strange isnt it …

Both Source and Target boxes were of the same OS configuration : HP UX 11.23 Itanium 64 Bit

For some reason was doing a platform migration instead of normal cloning.

The culprit was this file – ($AD_TOP/java/oracle/apps/ad/util) version 120.11.12000000.5, which gets copied to $COMMON_TOP/clone/jlib/java/oracle/apps/ad/util during on the Source Instance, which is later used to verify the target server OS Platform during execution of on the target instance.


Apply Patch

This patch brings in a new version of SystemCheck.class file ( 120.11.12000000.7) which identifies and stores the host platform information as HPUX_IA64 against the previous version of the same file ( 120.11.12000000.5) which stores as HPUX_IA_64, which results in removing of .a & .o files (Platform migration).


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User ‘SYSADMIN’ does not have access to notification. ORA-06512: at APPS.WF_ADVANCED_WORKLIST

Posted on August 7, 2008. Filed under: Configuration, DBA/Admin Tips, R12, Workflow Mailer | Tags: , , , |

Users reported that they got below error message when they were trying to view the notifications while logged in as SYSADMIN user on a development instance.

ORA-20002: 3207: User ‘SYSADMIN’ does not have access to notification .
ORA-06512: at “APPS.WF_ADVANCED_WORKLIST”, line 82

A quick check on the Workflow System Administrator Value (How to check this value) revealed that the value is not set to SYSADMIN and its set to “Workflow Administrator Web (New)”.

Is this the cause of the problem, NO.

The problem was SYSADMIN user didnt have this responsibility (Workflow Administrator Web (New)) assigned to him. To resolve the issue, Assign the responsibility using System Administrator -> Security : User -> Define -> SYSADMIN user.


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