ServiceInitializationException fatal internal error

Errors while starting weblogic server:


com.bea.common.engine.ServiceInitializationException: org.apache.openjpa.util.InternalException: There was an error when invoking the static getInstance method on the named factory class "kodo.jdbc.kernel.KodoJDBCBrokerFactory".  See the nested exception for details.
at com.bea.common.engine.internal.ServiceEngineImpl.findOrStartService(ServiceEngineImpl.java:365)
at com.bea.common.engine.internal.ServiceEngineImpl.findOrStartService(ServiceEngineImpl.java:315)
at com.bea.common.engine.internal.ServiceEngineImpl.lookupService(ServiceEngineImpl.java:257)
at com.bea.common.engine.internal.ServicesImpl.getService(ServicesImpl.java:72)
at weblogic.security.service.internal.WLSIdentityServiceImpl.initialize(WLSIdentityServiceImpl.java:47)
at weblogic.security.service.CSSWLSDelegateImpl.initializeServiceEngine(CSSWLSDelegateImpl.java:300)
at weblogic.security.service.CSSWLSDelegateImpl.initialize(CSSWLSDelegateImpl.java:221)
at weblogic.security.service.CommonSecurityServiceManagerDelegateImpl.InitializeServiceEngine(CommonSecurityServiceManagerDelegateImpl.java:1783)
at weblogic.security.service.CommonSecurityServiceManagerDelegateImpl.initializeRealm(CommonSecurityServiceManagerDelegateImpl.java:442)
at weblogic.security.service.CommonSecurityServiceManagerDelegateImpl.loadRealm(CommonSecurityServiceManagerDelegateImpl.java:840)
at weblogic.security.service.CommonSecurityServiceManagerDelegateImpl.initializeRealms(CommonSecurityServiceManagerDelegateImpl.java:869)
at weblogic.security.service.CommonSecurityServiceManagerDelegateImpl.initialize(CommonSecurityServiceManagerDelegateImpl.java:1028)
at weblogic.security.service.SecurityServiceManager.initialize(SecurityServiceManager.java:875)
at weblogic.security.SecurityService.start(SecurityService.java:141)
at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
Solution:
One of the possible solution for this is to check if the database port is correct in config.xml for <sec:connection-url> tag.