Weblogic Managed Server 启动失败

近来启动WebLogic Managed Server 时出现如下错误：
<Nov 11, 2013 1:04:27 AM PST> <Critical> <Security> <BEA-090402> <Authentication denied: Boot identity not valid; The user name and/or password from the boot identity file (boot.properties) is not valid. The boot identity may have been changed since the boot identity file was created. Please edit and update the boot identity file with the proper values of username and password. The first time the updated boot identity file is used to start the server, these new values are encrypted.> 
<Nov 11, 2013 1:04:27 AM PST> <Critical> <WebLogicServer> <BEA-000386> <Server subsystem failed. Reason: weblogic.security.SecurityInitializationException: Authentication denied: Boot identity not valid; The user name and/or password from the boot identity file (boot.properties) is not valid. The boot identity may have been changed since the boot identity file was created. Please edit and update the boot identity file with the proper values of username and password. The first time the updated boot identity file is used to start the server, these new values are encrypted.
weblogic.security.SecurityInitializationException: Authentication denied: Boot identity not valid; The user name and/or password from the boot identity file (boot.properties) is not valid. The boot identity may have been changed since the boot identity file was created. Please edit and update the boot identity file with the proper values of username and password. The first time the updated boot identity file is used to start the server, these new values are encrypted.
	at weblogic.security.service.CommonSecurityServiceManagerDelegateImpl.doBootAuthorization(CommonSecurityServiceManagerDelegateImpl.java:960)
	at weblogic.security.service.CommonSecurityServiceManagerDelegateImpl.initialize(CommonSecurityServiceManagerDelegateImpl.java:1054)
	at weblogic.security.service.SecurityServiceManager.initialize(SecurityServiceManager.java:873)
	at weblogic.security.SecurityService.start(SecurityService.java:141)
	at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64)
	Truncated. see log file for complete stacktrace
Caused By: javax.security.auth.login.FailedLoginException: [Security:090303]Authentication Failed: User biadmin weblogic.security.providers.authentication.LDAPAtnDelegateException: [Security:090295]caught unexpected exception
	at weblogic.security.providers.authentication.LDAPAtnLoginModuleImpl.login(LDAPAtnLoginModuleImpl.java:251)
	at com.bea.common.security.internal.service.LoginModuleWrapper$1.run(LoginModuleWrapper.java:110)
	at com.bea.common.security.internal.service.LoginModuleWrapper.login(LoginModuleWrapper.java:106)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	Truncated. see log file for complete stacktrace
> 
<Nov 11, 2013 1:04:27 AM PST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to FAILED> 

解决方法：
Follow the following steps:
1: remove the boot.properties file completely from the managed server directory.
2: remove the ManagedServerDir/data/ldap directory completely.
3: Always keep backup of files before removing it.
4: Now try to start the server from the command prompt and provide the username/password used to login to the Admin Console.

   ./startManagedWebLogic.sh  SmartView