I use STS(spring tool suite) + maven plugin.
Every time when I run my application using maven-clean I see following error:
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building hhsystem ui 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.4.1:clean (default-clean) @ ui ---
[INFO] Deleting C:\Users\Nikolay_Tkachev\workspace\HHSystem\UI\target
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.471s
[INFO] Finished at: Mon Oct 21 12:34:33 MSK 2013
[INFO] Final Memory: 2M/90M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-clean-plugin:2.4.1:clean (default-clean) on project ui: Failed to clean project: Failed to delete C:\Users\Nikolay_Tkachev\workspace\HHSystem\UI\target\org.ow2.util.asm-asm-tree-3.1.jar -> [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
I have to close STS and go to C:\Users\Nikolay_Tkachev\workspace\HHSystem\UI\target and delete org.ow2.util.asm-asm-tree-3.1.jar
After starting STS again it works, but this is a hassle.
Can you help me with this problem?
UPDATE
for Kalathoki L.
I run maven-clean from this state:

I see same behaviour from the command line as from the eclipse plugin
If I watch unlocker when STS is running I see
 :
:
 
     icon
in the toolbar. In the Servers view, the status of the server
changes to Stopped.
 icon
in the toolbar. In the Servers view, the status of the server
changes to Stopped. icon in the toolbar.
icon in the toolbar. 
     
     
     
     
     
     
     
     
     
     
     
     
     
    
 
     
     
     
     
     
     
     
     
     
     
    