java.lang.NullPointerException

Oracle Community | 525407 | 9 years ago
tip
Your exception is missing from the Samebug knowledge base.
Here are the best solutions we found on the Internet.
Click on the to mark the helpful solution and get rewards for you help.
  1. 0

    If I have the ExtensionsFilter configured in my web.xml it throws an error whenever a page is not found saying that the response is already committed instead of just displaying the 404 error page that I have created. java.lang.IllegalStateException: getOutputStream() has already been called for this response at org.apache.catalina.connector.Response.getWriter(Response.java:599) at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:195) at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:124) at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:117) at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:191) at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:115) at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:75) at org.apache.jsp.errors._404_jsp._jspService(_404_jsp.java:67) If I comment out the ExtensionsFilter it works fine and displays the 404 splash page from my application as it should. Here is the snippet from my web.xml: <filter> <filter-name>MyFacesExtensionsFilter</filter-name> <filter-class>org.apache.myfaces.component.html.util.ExtensionsFilter</filter-class> <init-param> <description>Set the size limit for uploaded files. Format: 10 - 10 bytes 10k - 10 KB 10m - 10 MB 1g - 1 GB </description> <param-name>uploadMaxFileSize</param-name> <param-value>100m</param-value> </init-param> <init-param> <description>Set the threshold size - files below this limit are stored in memory, files above this limit are stored on disk. Format: 10 - 10 bytes 10k - 10 KB 10m - 10 MB 1g - 1 GB </description> <param-name>uploadThresholdSize</param-name> <param-value>100k</param-value> </init-param> </filter> <filter-mapping> <filter-name>MyFacesExtensionsFilter</filter-name> <url-pattern>*.jsf</url-pattern> </filter-mapping>

    Apache's JIRA Issue Tracker | 1 decade ago | Bryan Hansen
    java.lang.NullPointerException
  2. Speed up your debug routine!

    Automated exception search integrated into your IDE

  3. 0

    java.lang.NullPointerException

    Oracle Community | 10 years ago | 843844
    java.lang.NullPointerException
  4. 0

    i need help in JSF

    Oracle Community | 10 years ago | 843844
    java.lang.NullPointerException

    Not finding the right solution?
    Take a tour to get the most out of Samebug.

    Tired of useless tips?

    Automated exception search integrated into your IDE

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at javax.faces.webapp.UIComponentTag.setupResponseWriter()
    2. JavaEE 7
      UIComponentTag.doStartTag
      1. javax.faces.webapp.UIComponentTag.setupResponseWriter(UIComponentTag.java:929)
      2. javax.faces.webapp.UIComponentTag.doStartTag(UIComponentTag.java:310)
      2 frames