ServletWrapper.service() has thrown a NullPointerException

We found this prefix in 2 webpages.
MapChildren (2)Typical messages (1)TraceDetailed Map
  1. java.lang.NullPointerException
    1.   at com.ibm.ws.webcontainer.srt.SRTServletResponse.setContentType()
    2.   at org.apache.roller.weblogger.ui.rendering.servlets.PreviewThemeImageServlet.doGet()
    3.   at javax.servlet.http.HttpServlet.service()
    4.   at javax.servlet.http.HttpServlet.service()
    5.   at com.ibm.ws.webcontainer.servlet.ServletWrapper.service()
    6.   at com.ibm.ws.webcontainer.servlet.ServletWrapper.service()
  1. I got database error on Roller 4.0.1

    First:9 years ago
    Last:2 years ago
    Author:(David) Ming Xia
  2. I got database error on Roller 4.0.1

    First:9 years ago
    Last:2 years ago
    Author:(David) Ming Xia
MessageNumber of crashes
<No message>2
  1. java.lang.NullPointerException
    1.   at com.ibm.ws.webcontainer.srt.SRTServletResponse.setContentType()
    2.   at org.apache.roller.weblogger.ui.rendering.servlets.PreviewThemeImageServlet.doGet()
    3.   at javax.servlet.http.HttpServlet.service()
    4.   at javax.servlet.http.HttpServlet.service()
    5.   at com.ibm.ws.webcontainer.servlet.ServletWrapper.service()
    6.   at com.ibm.ws.webcontainer.servlet.ServletWrapper.service()