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Random Data Sets Error: .."inability to establish the client portion of a socket."

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  • 1.  Random Data Sets Error: .."inability to establish the client portion of a socket."

    Posted 05-09-2017 03:49 PM

    Hi All, 

     

    Thanks for helping me out on the forums all the time. This time I have a web service using Devtest 9.1, it uses the Read Rows From a JDBC Table function under Data Sets to read from a MySQL database where I proceed to make a custom response. The service works fine for many individual transactions when deployed. 

     

    However, when I tried to run a small load test, basically a couple hundred transactions per second. After maybe 5000 or so transactions the service stops and I see this error in the Inspection view:

     

    Trapped Exception: The driver was unable to create a connection due to an inability to establish the client portion of a socket.  This is usually caused by a limit on the number of sockets imposed by the operating system. This limit is usually configurable. 

     

    Does this feature use a connection pool? It doesn't give me a checkbox like the other SQL features (For example "SQL Database Execution"). Is this something that I have to adjust on the operating system? We are hosting the service and VSEs in a Windows Server 2012 environment. Is this something that is to be adjusted on the DevTest Side or maybe the MySQL side?

     

    Thanks as always for the help!



  • 2.  Re: Random Data Sets Error: .."inability to establish the client portion of a socket."

    Posted 05-09-2017 04:06 PM

    Are you running this on Linux?  

     

    If so what it your ulimit? 

     

    You may need to increase the number of open file handlers for the system.



  • 3.  Re: Random Data Sets Error: .."inability to establish the client portion of a socket."

    Posted 05-10-2017 09:43 AM

    I am running this on Windows 2012 Server R2.



  • 4.  Re: Random Data Sets Error: .."inability to establish the client portion of a socket."

    Posted 05-10-2017 09:52 AM

    What JDBC Driver are you using to connect to MySQL?



  • 5.  Re: Random Data Sets Error: .."inability to establish the client portion of a socket."

    Posted 05-10-2017 03:17 PM

    We're using this driver class:      com.mysql.jdbc.Driver



  • 6.  Re: Random Data Sets Error: .."inability to establish the client portion of a socket."
    Best Answer

    Posted 05-10-2017 05:44 PM

    I am not 100% sure, but this might be a configuration on your MySQL side, see the link below:

     

    java - Connection Exception fetching large data from mysql - Stack Overflow 



  • 7.  Re: Random Data Sets Error: .."inability to establish the client portion of a socket."

    Posted 05-11-2017 03:29 PM

    Thanks! It actually worked. We increased the connection pool on the MySQL side and it worked.