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Thread: glassfish error - process already using port 4848

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    Default glassfish error - process already using port 4848

    I am trying to set glassfish up to create some java servlets.
    I can navigate to the correct folder and if i enter asadmin everything is fine.
    When i enter start-domain i get this error:
    asadmin> start-domain
    There is a process already using the admin port 4848 -- it probably is another instance of a GlassFish server.
    Command start-domain failed.

    How do i find out if there is another process running on port 4848 and how do i fix this problem if there is.
    Thanks


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    Default Re: glassfish error - process already using port 4848

    On both linux and Windows you should be able to use netstat to find which ports are in use. I'd suggest shutting down the identified application and trying again. If you don't know how to use netstat, just shutdown all applications and try to start the server.

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    Default Re: glassfish error - process already using port 4848

    I play around with a few netstat commands. Apparently this should show processes using a particular port
    netstat -an | grep ':4048'
    I tried this and it returned nothing. I am using a mac by the way, if that helps describing further steps easier.

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    Default Re: glassfish error - process already using port 4848

    Quote Originally Posted by wdh View Post
    There is a process already using the admin port 4848
    Quote Originally Posted by wdh View Post
    I play around with a few netstat commands. Apparently this should show processes using a particular port
    netstat -an | grep ':4048'
    I tried this and it returned nothing. I am using a mac by the way, if that helps describing further steps easier.
    4048 is off by about 800. Try 4848

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    Default Re: glassfish error - process already using port 4848

    Sorry that was a typo. It still returns nothing.

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    Default Re: glassfish error - process already using port 4848

    Try doing so with root permissions (type sudo prior to the netstat command, and enter password when prompted). If that doesn't work my only recommendation would be to restart the computer and trying again.

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    Default Re: glassfish error - process already using port 4848

    unfortunately that returns nothing as well. I have read it could return this error if the hostname does not resolve to an IP . . . .
    Not sure how to check this though.

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    Default Re: glassfish error - process already using port 4848

    Did not have mac access earlier - I just tried netstat and it seems it operates differently than linux (which separates the port from IP via a semicolon) - try doing so without the semicolon

    netstat -an | grep 4848

    If it returns nothing than I can only suggest to dig deep into the documentation of Glassfish or scour the internet for others who have had a similar problem.

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    Default Re: glassfish error - process already using port 4848

    That also returns blank, so does typing sudo before it. I have done a lot of searching for that error message, i have tried changing the port number to something other than 4848.
    The other problem could be the host name is not resolving to an IP. Im not sure how i could check this and what to change. I have already looked inside etc/hosts

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