java.lang.NullPointerException

Stack Overflow | Arlo Guthrie | 5 months ago
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    Spring MVC and Websocket Exception using Sockjs with Stompjs

    itquestionz.com | 1 year ago
    org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.web.socket.sockjs.SockJsException: Uncaught failure in SockJS request, uri=http://localhost:8080/frontend/track/info; nested exception is java.lang.NullPointerException
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    Spring MVC and Websocket Exception using Sockjs with Stompjs

    Stack Overflow | 2 years ago | Diego Fernando Murillo Valenci
    org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.web.socket.sockjs.SockJsException: Uncaught failure in SockJS request, uri=http://localhost:8080/frontend/track/info; nested exception is java.lang.NullPointerException
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    org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException in REST with Spring

    Stack Overflow | 12 months ago | Rishi
    org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException

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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at java.util.ArrayList.<init>()
    2. Java RT
      ArrayList.<init>
      1. java.util.ArrayList.<init>(ArrayList.java:177)[rt.jar:1.8.0_92]
      1 frame
    3. Undertow Servlet
      HttpServletResponseImpl.getHeaders
      1. io.undertow.servlet.spec.HttpServletResponseImpl.getHeaders(HttpServletResponseImpl.java:248)[undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
      1 frame
    4. JavaServlet
      HttpServletResponseWrapper.getHeaders
      1. javax.servlet.http.HttpServletResponseWrapper.getHeaders(HttpServletResponseWrapper.java:303)[jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
      1 frame
    5. Spring
      ServletServerHttpResponse$ServletResponseHttpHeaders.containsKey
      1. org.springframework.http.server.ServletServerHttpResponse$ServletResponseHttpHeaders.get(ServletServerHttpResponse.java:160)[spring-web-4.2.7.RELEASE.jar:4.2.7.RELEASE]
      2. org.springframework.http.server.ServletServerHttpResponse$ServletResponseHttpHeaders.containsKey(ServletServerHttpResponse.java:142)[spring-web-4.2.7.RELEASE.jar:4.2.7.RELEASE]
      2 frames
    6. Spring MVC
      AbstractMessageConverterMethodProcessor.writeWithMessageConverters
      1. org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.addContentDispositionHeader(AbstractMessageConverterMethodProcessor.java:346)[spring-webmvc-4.2.7.RELEASE.jar:4.2.7.RELEASE]
      2. org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:238)[spring-webmvc-4.2.7.RELEASE.jar:4.2.7.RELEASE]
      2 frames