Client is not able to reassert its lock because server has already stolen it. Lock is either used by server or it is handed over to some other client. Reasserting client will return error to the application.
Restart your application. Consult the "Maintenance and Problem Determination Guide" for suggestions for assessing system health. View the operating system log on the server machine. Check your SAN configuration for problems. Contact Technical Support.
Parent topic: Metadata server logging facility messages