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I try to run an EJB example using NetBeans IDE and GlassFish Server v3. When I run my client code(The class that have main method), I faced this Error:

"Starting GlassFish Server 3.1.2 GlassFish Server 3.1.2 Server cannot start. Port is occupied. C:\Users\7\Documents\NetBeansProjects\MDbexample\nbproject\build-impl.xml:907: Deployment error: GlassFish Server 3.1.2 Server cannot start. Port is occupied."

So I decided to run GlassFish by using command line:

c:\glassfish3\bin>asadmin start-domain

Now I faced this massage on cmd environment:

"There is a process already using the admin port 4848 -- it probably is another instance of a GlassFish server. Command start-domain failed."

Is there anybody that know How I can solve my problem?

Thanks in advance.