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Thread: app exe get error can't connect db server

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    Default app exe get error can't connect db server

    hi!
    i am new in java and i create simple application login form and from launch4j i make exe file it works fine but when i i install diffrent computer i get error can't connect db server
    thanks
    Last edited by lavesh; August 18th, 2018 at 09:42 AM.

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    Default Re: app exe get error can't connect db server

    Is this a problem with a java program? Normally java programs do not execute from a exe file.

    Can you copy the full text of any error messages and paste it here?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: app exe get error can't connect db server

    thanks for your reply
    jar execu file in dist folder work fine
    i used launch4j to create exe file from jar file it works fine but i install diffrant machine i get error " can't connect db server"

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    Default Re: app exe get error can't connect db server

    What is the full text of the error message when the code is executed?

    Does the program print out a full stack trace when there is an exception? It needs to do that so that error can be tracked down.
    Make sure all catch blocks have code that calls the printStackTrace method to give a full trace of the error.

    Have you tried to use the jar file that contains the program instead of using launch4j's output exe file?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: app exe get error can't connect db server

    java.sql.SqlnonTransientConnectionException:Could not crete conection to database server.Attempted reconnect 3 times.Giving up

    java.lang.nullpointerException

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    Default Re: app exe get error can't connect db server

    java.lang.nullpointerException
    That looks important. Can you add a call to printStackTrace to all the catch blocks so that the full stack is printed showing where the exception happened?


    You should copy and paste the exact text of any error messages. Don't type them in from memory.


    java.sql.SqlnonTransientConnectionException
    The API doc for that error says:
    Please consult your driver vendor documentation for the vendor-specified conditions for which this Exception may be thrown.
    If you don't understand my answer, don't ignore it, ask a question.

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