java.lang.NullPointerException

Stack Overflow | Arlo Guthrie | 9 months ago
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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