The system has encountered an error when servicing the request, Please try again. If the error persists, please contact the system administrator.

While accessing R12.2 EBS url we have faced this below mentioned error

"The system has encountered an error when servicing the request, Please try again. If the error persists, please contact the system administrator."

In Weblogic Console, all the services are up and running successfully.

In Oacore_server.log file:

java.lang.NoClassDefFoundError: Could not initialize class oracle.apps.fnd.functionSecurity.User

In oacore_server.out 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: 12345. The list of hosts in the distributed caching system is: 172.16.1.1 . The port 12345 should be free on each host running the JVMs.

Solution:

Shut down the application services and check the java cache port number is still accessing or not.

$netstat -ntpl |grep 12345
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 ::ffff:172.16.1.1:12345 :::*                        LISTEN      6171/java

find the process for this port number and kill the process.

$ps -ef|grep 6171
applmgr   6171     1  0 Jul27 ?        00:51:22 /u01/applmgr/fs1/EBSapps/comn/util/jdk32/bin/java -
applmgr  27304 24214  0 16:19 pts/0    00:00:00 grep 6171

$kill -9 6171

Start the application services and this time ebs url worked fine without any issue.

Find Roles and Privilege

SQL> desc user_sys_privs;
 Name                                      Null?    Type
 ----------------------------------------- -------- ------------------------
 USERNAME                                           VARCHAR2(30)
 PRIVILEGE                                 NOT NULL VARCHAR2(40)
 ADMIN_OPTION                                       VARCHAR2(3)

 SQL>desc dba_role_privs;
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 GRANTEE                                            VARCHAR2(30)
 GRANTED_ROLE                              NOT NULL VARCHAR2(30)
 ADMIN_OPTION                                       VARCHAR2(3)

 DEFAULT_ROLE                                       VARCHAR2(3)

SQL>desc role_sys_privs;
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 ROLE                                      NOT NULL VARCHAR2(30)
 PRIVILEGE                                 NOT NULL VARCHAR2(40)
 ADMIN_OPTION                                       VARCHAR2(3)

SQL>desc role_tab_privs;

 Name                                      Null?    Type

 ----------------------------------------- -------- ----------------------------

 ROLE                                      NOT NULL VARCHAR2(30)

 OWNER                                     NOT NULL VARCHAR2(30)

 TABLE_NAME                                NOT NULL VARCHAR2(30)

 COLUMN_NAME                                        VARCHAR2(30)

 PRIVILEGE                                 NOT NULL VARCHAR2(40)

 GRANTABLE                                          VARCHAR2(3)

SQL>desc role_role_privs;

 Name                                      Null?    Type

 ----------------------------------------- -------- ----------------------------

 ROLE                                      NOT NULL VARCHAR2(30)

 GRANTED_ROLE                              NOT NULL VARCHAR2(30)

 ADMIN_OPTION                                       VARCHAR2(3)

Current User Privileges:
-----------------------------
SQL> desc user_sys_privs;
 Name                                      Null?    Type
 ----------------------------------------- -------- ------------------------
 USERNAME                                           VARCHAR2(30)
 PRIVILEGE                                 NOT NULL VARCHAR2(40)

 ADMIN_OPTION                                       VARCHAR2(3)