Did you took thread dump when it got stuck in these entries? It would have more helpful.
For quicker restart, you can remove the data/store directory of the server. However, if you are worried about the possible loss of messages, then you can use weblogic store admin utility to compact the persistent store and try starting it.
More details on store admin utility can be found @ Tuning the WebLogic Persistent Store
Add -Dweblogic.StdoutDebugEnabled flag while starting the managed server and then post the verbose error message in your next post
For setting the flag follow the below steps
If your using Linux box and not using node manager to start the managed server,add the below line startManagedWebLogic.sh file
If your using Windows box and not using node manager to start the managed server,add the below line startManagedWebLogic.cmd file
set JAVA_OPTIONS=-Dweblogic.StdoutDebugEnabled=true %JAVA_OPTIONS%
If you are starting the Managed server through the node manager then use these flags From Admin console : servers >>>. MS1 >>>> server start >>>> Arguments :-Dweblogic.StdoutDebugEnabled=true