Below are the errors you may receive, in order, and how to resolve them:
<Warning> <EmbeddedLDAP> <BEA-171520> <Could not obtain an exclusive lock for directory: /.jdeveloper/system11.1.1.5.37.60.13/DefaultDomain/servers/DefaultServer/data/ldap/ldapfiles. Waiting for 10 seconds and then retrying in case existing WebLogic Server is still shutting down.>
Go to the folder detailed in the error (the path may be a hidden depending on your OS). Delete the .lok file in the indicated folder.
<Mar 1, 2012 1:05:17 PM EST> <Error> <Store> <BEA-280061> <The persistent store "_WLS_DefaultServer" could not be deployed: weblogic.store.PersistentStoreException: [Store:280105]The persistent file store "_WLS_DefaultServer" cannot open file _WLS_DEFAULTSERVER000000.DAT.
Staying in the data folder, go to /store/default and delete the file indicated in the error.
<Mar 1, 2012 1:15:41 PM EST> <Critical> <WebLogicServer> <BEA-000362> <Server failed. Reason: There are 1 nested errors: weblogic.store.PersistentStoreException: [Store:280105]The persistent file store "WLS_DIAGNOSTICS" cannot open file WLS_DIAGNOSTICS000000.DAT.
Staying in the data folder, go to /store/diagnostics and delete the file indicated in the error.