OAM 11G R2 PS2 Upgrade Issue:

Error:
oracle.security.am.admin.config.util.DataConnectionUtility getConnection
WARNING: Failed to get connection
java.sql.SQLException: ORA-01017: invalid username/password; logon denied

        at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:445)
        at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:389)
        at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:382)
        at oracle.jdbc.driver.T4CTTIfun.processError(T4CTTIfun.java:600)
        at oracle.jdbc.driver.T4CTTIoauthenticate.processError(T4CTTIoauthenticate.java:445)
        at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:450)
        at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:192)
        at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:380)
        at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:760)
        at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:401)
        at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:546)
        at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:236)
        at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
        at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521)
        at oracle.jdbc.pool.OracleDataSource.getPhysicalConnection(OracleDataSource.java:280)
        at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:207)
        at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:157)
        at oracle.security.am.admin.config.util.DataConnectionUtility.getConnection(DataConnectionUtility.java:139)
        at oracle.security.am.upgrade.framework.psfe.util.PSFEUtils.validateDBConnectionDetails(PSFEUtils.java:232)
        at oracle.security.am.upgrade.framework.psfe.PSFEFramework.processOffline(PSFEFramework.java:193)
        at oracle.security.am.wlst.util.WLSTServerUtil.executeCommand(WLSTServerUtil.java:230)
        at oracle.security.am.wlst.WLSTWrapper.executeCommand(WLSTWrapper.java:152)
        at oracle.security.am.wlst.WLSTWrapper.execute(WLSTWrapper.java:107)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.python.core.PyReflectedFunction.__call__(Unknown Source)
        at org.python.core.PyReflectedFunction.__call__(Unknown Source)
        at org.python.core.PyObject.__call__(Unknown Source)
        at org.python.core.PyObject.invoke(Unknown Source)
        at OamInternal_handler$py.patchUpgradeImpl$78(/Middleware/Oracle_IDM1/common/script_handlers/OamInternal_handler.py:1313)
        at OamInternal_handler$py.call_function(/Middleware/Oracle_IDM1/common/script_handlers/OamInternal_handler.py)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyFunction.__call__(Unknown Source)
        at org.python.core.PyObject.invoke(Unknown Source)
        at Oam_common$py.upgradeConfig$73(/Middleware/Oracle_IDM1/common/script_handlers/Oam_common.py:883)
        at Oam_common$py.call_function(/Middleware/Oracle_IDM1/common/script_handlers/Oam_common.py)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyFunction.__call__(Unknown Source)
        at org.python.core.PyObject.__call__(Unknown Source)
        at org.python.core.PyObject.invoke(Unknown Source)
        at org.python.pycode._pyx49.upgradeConfig$74(/Middleware/Oracle_IDM1/common/wlst/Oam.py:553)
        at org.python.pycode._pyx49.call_function(/Middleware/Oracle_IDM1/common/wlst/Oam.py)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyFunction.__call__(Unknown Source)
        at org.python.core.PyObject.__call__(Unknown Source)
        at org.python.pycode._pyx65.f$0(<console>:1)
        at org.python.pycode._pyx65.call_function(<console>)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyCode.call(Unknown Source)
        at org.python.core.Py.runCode(Unknown Source)
        at org.python.core.Py.exec(Unknown Source)
        at org.python.util.PythonInterpreter.exec(Unknown Source)
        at org.python.util.InteractiveInterpreter.runcode(Unknown Source)
        at org.python.util.InteractiveInterpreter.runsource(Unknown Source)
        at org.python.util.InteractiveInterpreter.runsource(Unknown Source)
        at weblogic.management.scripting.WLST.main(WLST.java:188)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at weblogic.WLST.main(WLST.java:29)
Oct 30, 2014 11:59:25 PM oracle.security.am.upgrade.framework.psfe.PSFEFramework processOffline
SEVERE: Database connection details are incorrect
Oct 30, 2014 11:59:25 PM oracle.security.am.wlst.WLSTWrapper execute
SEVERE: Unable to execute the WLST Command
java.lang.Exception: upgradeConfig failed
        at oracle.security.am.wlst.util.WLSTServerUtil.executeCommand(WLSTServerUtil.java:232)
        at oracle.security.am.wlst.WLSTWrapper.executeCommand(WLSTWrapper.java:152)
        at oracle.security.am.wlst.WLSTWrapper.execute(WLSTWrapper.java:107)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.python.core.PyReflectedFunction.__call__(Unknown Source)
        at org.python.core.PyReflectedFunction.__call__(Unknown Source)
        at org.python.core.PyObject.__call__(Unknown Source)
        at org.python.core.PyObject.invoke(Unknown Source)
        at OamInternal_handler$py.patchUpgradeImpl$78(/Middleware/Oracle_IDM1/common/script_handlers/OamInternal_handler.py:1313)
        at OamInternal_handler$py.call_function(/Middleware/Oracle_IDM1/common/script_handlers/OamInternal_handler.py)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyFunction.__call__(Unknown Source)
        at org.python.core.PyObject.invoke(Unknown Source)
        at Oam_common$py.upgradeConfig$73(/Middleware/Oracle_IDM1/common/script_handlers/Oam_common.py:883)
        at Oam_common$py.call_function(/Middleware/Oracle_IDM1/common/script_handlers/Oam_common.py)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyFunction.__call__(Unknown Source)
        at org.python.core.PyObject.__call__(Unknown Source)
        at org.python.core.PyObject.invoke(Unknown Source)
        at org.python.pycode._pyx49.upgradeConfig$74(/Middleware/Oracle_IDM1/common/wlst/Oam.py:553)
        at org.python.pycode._pyx49.call_function(/Middleware/Oracle_IDM1/common/wlst/Oam.py)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyFunction.__call__(Unknown Source)
        at org.python.core.PyObject.__call__(Unknown Source)
        at org.python.pycode._pyx65.f$0(<console>:1)
        at org.python.pycode._pyx65.call_function(<console>)
        at org.python.core.PyTableCode.call(Unknown Source)
        at org.python.core.PyCode.call(Unknown Source)
        at org.python.core.Py.runCode(Unknown Source)
        at org.python.core.Py.exec(Unknown Source)
        at org.python.util.PythonInterpreter.exec(Unknown Source)
        at org.python.util.InteractiveInterpreter.runcode(Unknown Source)
        at org.python.util.InteractiveInterpreter.runsource(Unknown Source)
        at org.python.util.InteractiveInterpreter.runsource(Unknown Source)
        at weblogic.management.scripting.WLST.main(WLST.java:188)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at weblogic.WLST.main(WLST.java:29)
Unable to execute the commandupgradeConfig failed

Solution: 

Make sure the schema details are in UPPER case(SYS,PREFIX_OAM) and password is correct.