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Thread: "com.mysql.jdbc.exceptions.jdbc4.Communication sExc eption: Communications link failure

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    Default "com.mysql.jdbc.exceptions.jdbc4.Communication sExc eption: Communications link failure

    I'm trying to run my jsp page but netbean ide keep giving me this error:-

    root cause

    javax.servlet.ServletException: javax.servlet.jsp.JspException: Unable to get connection, DataSource invalid: "com.mysql.jdbc.exceptions.jdbc4.CommunicationsExc eption: Communications link failure

    The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server."
    org.apache.jasper.runtime.PageContextImpl.doHandle PageException(PageContextImpl.java:862)
    org.apache.jasper.runtime.PageContextImpl.handlePa geException(PageContextImpl.java:791)
    org.apache.jsp.DisplayData_jsp._jspService(Display Data_jsp.java:141)
    org.apache.jasper.runtime.HttpJspBase.service(Http JspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
    org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:374)
    org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:342)
    org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:267)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
    org.netbeans.modules.web.monitor.server.MonitorFil ter.doFilter(MonitorFilter.java:393)

    root cause

    javax.servlet.jsp.JspException: Unable to get connection, DataSource invalid: "com.mysql.jdbc.exceptions.jdbc4.CommunicationsExc eption: Communications link failure

    The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server."
    org.apache.taglibs.standard.tag.common.sql.QueryTa gSupport.getConnection(QueryTagSupport.java:276)
    org.apache.taglibs.standard.tag.common.sql.QueryTa gSupport.doStartTag(QueryTagSupport.java:159)
    org.apache.jsp.DisplayData_jsp._jspx_meth_sql_005f query_005f0(DisplayData_jsp.java:191)
    org.apache.jsp.DisplayData_jsp._jspService(Display Data_jsp.java:93)
    org.apache.jasper.runtime.HttpJspBase.service(Http JspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
    org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:374)
    org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:342)
    org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:267)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
    org.netbeans.modules.web.monitor.server.MonitorFil ter.doFilter(MonitorFilter.java:393)

    So, i thought I would add the MySQL connector jar file again. I added in relative file at the add library there.

    ..\..\Mysqlconnector\mysql-connector-java-5.1.15\

    Not sure why still can't get connected.

    Hope someone can advise me how to make it work. Thanks.


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    Default Re: "com.mysql.jdbc.exceptions.jdbc4.Communication sExc eption: Communications link fa


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    Default Re: "com.mysql.jdbc.exceptions.jdbc4.Communication sExc eption: Communications link f

    Quote Originally Posted by luck999 View Post
    Thank you luck999. After I add in the resources reference, they don't give me the error already. However, I am still exploring other areas of errors. :-(

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    Default Re: "com.mysql.jdbc.exceptions.jdbc4.Communication sExc eption: Communications link fa

    Hi,
    Please check the version of database and use the correct jar , I think that may be the cause.

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