Everytime I kill the process that did not acknowledge received messages, I have to reboot

Because server.lock in journal directory can't be deleted by locking a process.

I want to know what the process lock the file and how to delete the file by foce.

thanks..

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-clean-plugin:2.4.1:clean (default-clean) on project hornetq-jms-multiple-failover-example: Failed to clean project: Failed to delete D:\ide\git\repository\hornetq\examples\jms\multiple-failover\target\server0\data\messaging\journal\server.lock -> [Help 1]

[ERROR]

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.

[ERROR] Re-run Maven using the -X switch to enable full debug logging.

[ERROR]

[ERROR] For more information about the errors and possible solutions, please read the following articles:

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException