java.lang.NullPointerException

Stack Overflow | Waleed Khan | 6 months ago
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    Read XML file in server from servlet

    Stack Overflow | 6 months ago | Waleed Khan
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at com.login.queryDatabase.query()
    2. com.login
      loginServlet.doPost
      1. com.login.queryDatabase.query(queryDatabase.java:14)
      2. com.login.loginServlet.doPost(loginServlet.java:29)
      2 frames
    3. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
      2. javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
      2 frames
    4. Glassfish Core
      ApplicationFilterChain.doFilter
      1. org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
      2. org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
      2 frames
    5. Tomcat WS
      WsFilter.doFilter
      1. org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
      1 frame
    6. Glassfish Core
      CoyoteAdapter.service
      1. org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
      2. org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
      3. org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
      4. org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
      5. org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
      6. org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
      7. org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
      8. org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
      9. org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
      10. org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
      10 frames
    7. Grizzly HTTP
      NioEndpoint$SocketProcessor.run
      1. org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099)
      2. org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670)
      3. org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
      4. org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
      4 frames
    8. Java RT
      ThreadPoolExecutor$Worker.run
      1. java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
      2. java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
      2 frames
    9. Tomcat Util
      TaskThread$WrappingRunnable.run
      1. org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
      1 frame
    10. Java RT
      Thread.run
      1. java.lang.Thread.run(Unknown Source)
      1 frame