Metacat

1.
Jan 26, 2009 2:15:48 PM org.apache.catalina.core.StandardWrapperValve invoke
2.
SEVERE: Servlet.service() for servlet MetaCatAdmin threw exception
3.
java.lang.NullPointerException
4.
at edu.ucsb.nceas.metacat.service.SessionService.isSessionRegistered(SessionService.java:120)
5.
at edu.ucsb.nceas.metacat.service.SessionService.touchSession(SessionService.java:148)
6.
at edu.ucsb.nceas.metacat.admin.MetaCatAdminServlet.handleGetOrPost(MetaCatAdminServlet.java:103)
7.
at edu.ucsb.nceas.metacat.admin.MetaCatAdminServlet.doPost(MetaCatAdminServlet.java:81)
8.
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
9.
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
10.
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
11.
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
12.
at org.vfny.geoserver.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:122)
13.
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
14.
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
15.
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
16.
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
17.
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
18.
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
19.
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
20.
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
21.
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
22.
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
23.
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
24.
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773)
25.
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703)
26.
at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:895)
27.
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
28.
at java.lang.Thread.run(Thread.java:595)

This turned out to be a byproduct of a bad skin configuration. I went ahead and added checks for null session ids so the exceptions could be handled gracefully as opposed to throwing a NPE.

Original Bugzilla ID was 3778