[Spacewalk-list] Java null pointer exceptions

[Brian Long]

Running Spacewalk 2.9-latest and I see errors like the following from my
Spacewalk server talking to itself (not a client talking to Spacewalk).
Does anyone know what causes this or how I can track it down further?  I'm
receiving one or two emails per day with errors like this.

The following exception occurred while executing this request:
GET /rhn/common/DownloadFile.do

Date:3/31/20 1:31:27 PM UTC
Headers:
  user-agent: Red Hat Enterprise Linux (anaconda)/7.6 yum/3.4.3
  host: 10.1.2.3
  accept: */*

Request:
Local Name = 10.1.2.3
Server Name = 10.1.2.3
Requested Session Valid = false
Session = org.apache.catalina.session.StandardSessionFacade at 6a0a1599
[session=StandardSession[06F6021D4390F06A4317FF50C54023BC]]
Protocol = http
Request Locale = en_US
Request Character Encoding = UTF-8
Attribute Names = rhnActiveLang, org.apache.struts.action.MESSAGE,
javax.servlet.error.status_code, org.apache.struts.action.mapping.instance,
requestedUri, org.apache.struts.action.MODULE,
javax.servlet.jsp.jstl.fmt.timeZone.request,
org.apache.struts.globals.ORIGINAL_URI_KEY, javax.servlet.error.message,
javax.servlet.error.servlet_name, javax.servlet.error.request_uri,
javax.servlet.error.exception,


User Information:
No User logged in.

Exception:
javax.servlet.ServletException: java.lang.NullPointerException
at
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:520)
at
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:427)
at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
at
com.redhat.rhn.frontend.struts.RhnRequestProcessor.process(RhnRequestProcessor.java:105)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1926)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:451)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at com.redhat.rhn.frontend.servlets.AuthFilter.doFilter(AuthFilter.java:104)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
com.opensymphony.sitemesh.webapp.SiteMeshFilter.obtainContent(SiteMeshFilter.java:129)
at
com.opensymphony.sitemesh.webapp.SiteMeshFilter.doFilter(SiteMeshFilter.java:77)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
com.redhat.rhn.frontend.servlets.LocalizedEnvironmentFilter.doFilter(LocalizedEnvironmentFilter.java:67)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
com.redhat.rhn.frontend.servlets.EnvironmentFilter.doFilter(EnvironmentFilter.java:101)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
com.redhat.rhn.frontend.servlets.SessionFilter.doFilter(SessionFilter.java:58)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
com.redhat.rhn.frontend.servlets.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:97)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:498)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:190)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
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