[Troubleshooting] Blank Page Issue In Oracle EBS 12.2

K21 Academy has been receiving a lot of queries on how to resolve the “Blank Page Issue in Oracle E-Business Suite while opening the EBS Admin URL (http://hostname.domainname:port) ” so we have collected the most common root cause for  Blank Page.

Through this post, I am going to show you how to troubleshoot the Blank Page Issue and various possible reasons which are the root cause of this issue.

These issues mostly occur with the newly cloned system. However, older systems are too affected by this, the listener can be down or the pages get corrupted because of a bug or maybe the instance is too slow to load the page there are many causes, let’s find out what might be affecting your system and how to resolve it.

These are some of the main reasons for the APPS blank login page in EBS 12.2

• Missing class files in the OA_HTML directory.
• JSP pages not compiled properly.
• Just after the clone.
• Database Listeners are down.
• Archive log space is full.
• Java Cache issues between the multiple middle-tiers.
• The instance is very slow/inaccessible.

Also check: Steps to download EBS R12 software from Edelivery Oracle site

[Error 1]: This issue is caused due to missing class files in the OA_HTML directory.

javax.servlet.ServletException: oracle.classloader.util.AnnotatedClassNotFoundException: Missing class: _AppsLocalLogin

Please perform the below steps:

• Shutdown the application services
• Compile the jsp’s manually using the below command:  perl $FND_TOP/patch/115/bin/ojspCompile.pl –compile –flush -p 2
• Check whether all the jsp’s are getting compiled successfully
• Restart the application services
• Clear the browser cache
• Try to open the R12 Login page

[Error 2]: AppsLocalLogin?.jsp page was displaying errors

[Solution]: Edited the $IAS_ORACLE_HOME/Apache/Jserv/etc/jserv.properties

•  Set wrapper.bin.parameters=-DLONG_RUNNING_JVM=false
• Add the line wrapper.bin.parameters=-DCACHEMODE=LOCAL
• Restarted Apache for these changes to take effect and retested the issue

Error 3: After a clone

[Solution]: Make the following changes

•  adopmnctl.sh stopall — to shutdown opmn managed services viz., opmn, forms, oacore & oc4j
• cd $COMMON_TOP/_pages
• mv _pages _pages_old
• cd $FND_TOP/patch/115/bin or export PATH=$FND_TOP/patch/115/bin:$PATH
  Compile all jsps. “perl ojspCompile.pl –compile –flush -p 2      (-p represents parallel threads, you can use from 1 or 10)”
• adopmnctl.sh startall

[Error 4]: Database Listener is down

[Solution]: To resolve this error start the database listener.

[Error 5]: Database Archive Location is full

[Solution]: For this, you can do two things, you can temporarily move the archive files to another location or you can delete older archive files.

[Error 6]: Java Cache issues between the multiple middle-tiers

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

Error Message in the 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(IASCacheProvider.java:214)
at oracle.apps.jtf.cache.CacheManager.activateCache(CacheManager.java:1451)

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.

[Solution]:

Autoconfig

• Bring down opmn services on both the boxes.
•  Verify no process is listening for s_java_object_cache_port value. command: lsof -i tcp:[port number]
• Change s_java_object_cache_port on all the nodes in the context file
• Run autoconfig

Non-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. Don’t forget to change it in $CONTEXT_FILE. (To take effect during next autoconfig)

[Error 7]: Instance is very slow/inaccessible with a warning on the login page:

Warning Message: Low-level logging is currently enabled. Your application will not perform as well while Low-level logging is on.

[Solution]: Change the following values to:

FND: Debug Log Enabled — No
FND: Debug Log Level — ( Blank )
FND: Debug Log Module — ( Blank )
SLA: Enable Diagnostics — No
FND Validation Level — None

This post is from our Oracle Apps DBA (R12.2) Training, in which we cover  Architecture & Changes in Oracle E-Business Suite R12.2, Staging & Installation, File System & Important Files in R12.2, Start/Stop, Patching, AD Administration, Cloning, Concurrent Managers, AutoConfig, Password Management, and Troubleshooting and much more.

Related/Further Readings

• Recommended Browsers for Oracle E-Business Suite Release 12 [Doc ID 389422.1] 
• Oracle E-Business Suite Release 12.2 Information Center (Doc ID 1581299.1)
• Oracle E-Business Suite Release 12.2.9 Readme (Doc ID 2495027.1)
• Oracle E-Business Suite 12.2.9 Now Available
• [Troubleshooting] Forms Issue: FRM-92050 failed to connect to server:forms/servlet
• Oracle E-Business Suite (EBS) 12.2.9 Now Available & Its Upgrade Steps
• Steps to download Oracle E-Business Suite R12 Software
• Oracle AppsDBA (R12.2) Training: Step by Step Activity Guides/Hands-On Lab Exercise
• Oracle AppsDBA (R12.2): Install | Patch | Clone | Maintain

Next Task For You

We cover Oracle E-Business R12.2 Architecture & concepts in our Oracle Apps DBA For Beginners Training along with the Installation, Patching, Cloning, and Troubleshooting and also, Database upgrade to 19c  and much more including the hands-on labs you must perform to upgrade your skills and get a good job with a high package.

Begin your journey towards becoming an Apps DBA by joining our FREE Masterclass on How To Learn Oracle Apps DBA (R12) & It’s New Features.