Bad version number in .class file when injecting

I am getting an UnsupportedClassVersionError when trying to
inject,
I'm not sure how I've caused this to start (it only started
yesterday). I have built both the nutch source and my webapp
on the
machine they're being run with the same java version as
tomcat is
running under. As far as I can see this error should not be
happening.

java -version:
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build
1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)

Exception:
java.lang.NullPointerException
        at
com.ipcmedia.nutch.webapp.search.IpcOpenSearchServlet.doGet(
IpcOpenSearchServlet.java:77)
        at
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)

        at
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFi
lter(ApplicationFilterChain.java:269)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(App
licationFilterChain.java:188)
        at
com.ipcmedia.nutch.webapp.filters.NutchInstanceFilter.doFilt
er(NutchInstanceFilter.java:57)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFi
lter(ApplicationFilterChain.java:215)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(App
licationFilterChain.java:188)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(Standar
dWrapperValve.java:210)
        at
org.apache.catalina.core.StandardContextValve.invoke(Standar
dContextValve.java:174)
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHo
stValve.java:127)
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorRepo
rtValve.java:117)
        at
org.apache.catalina.core.StandardEngineValve.invoke(Standard
EngineValve.java:108)
        at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAd
apter.java:151)
        at
org.apache.coyote.http11.Http11Processor.process(Http11Proce
ssor.java:870)
        at
org.apache.coyote.http11.Http11BaseProtocol$Http11Connection
Handler.processConnection(Http11BaseProtocol.java:665)
        at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(Poo
lTcpEndpoint.java:528)
        at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(
LeaderFollowerWorkerThread.java:81)
        at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.ru
n(ThreadPool.java:685)
        at java.lang.Thread.run(Thread.java:595)

It was dues to a plugin not being re-built properly.

On 7/25/07, Robert Young <bubblenutgmail.com> wrote:
> I am getting an UnsupportedClassVersionError when
trying to inject,
> I'm not sure how I've caused this to start (it only
started
> yesterday). I have built both the nutch source and my
webapp on the
> machine they're being run with the same java version as
tomcat is
> running under. As far as I can see this error should
not be happening.
>
> java -version:
> java version "1.5.0_06"
> Java(TM) 2 Runtime Environment, Standard Edition (build
1.5.0_06-b05)
> Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed
mode)
>
> Exception:
> java.lang.NullPointerException
>         at
com.ipcmedia.nutch.webapp.search.IpcOpenSearchServlet.doGet(
IpcOpenSearchServlet.java:77)
>         at
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)

>         at
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

>         at
org.apache.catalina.core.ApplicationFilterChain.internalDoFi
lter(ApplicationFilterChain.java:269)
>         at
org.apache.catalina.core.ApplicationFilterChain.doFilter(App
licationFilterChain.java:188)
>         at
com.ipcmedia.nutch.webapp.filters.NutchInstanceFilter.doFilt
er(NutchInstanceFilter.java:57)
>         at
org.apache.catalina.core.ApplicationFilterChain.internalDoFi
lter(ApplicationFilterChain.java:215)
>         at
org.apache.catalina.core.ApplicationFilterChain.doFilter(App
licationFilterChain.java:188)
>         at
org.apache.catalina.core.StandardWrapperValve.invoke(Standar
dWrapperValve.java:210)
>         at
org.apache.catalina.core.StandardContextValve.invoke(Standar
dContextValve.java:174)
>         at
org.apache.catalina.core.StandardHostValve.invoke(StandardHo
stValve.java:127)
>         at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorRepo
rtValve.java:117)
>         at
org.apache.catalina.core.StandardEngineValve.invoke(Standard
EngineValve.java:108)
>         at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAd
apter.java:151)
>         at
org.apache.coyote.http11.Http11Processor.process(Http11Proce
ssor.java:870)
>         at
org.apache.coyote.http11.Http11BaseProtocol$Http11Connection
Handler.processConnection(Http11BaseProtocol.java:665)
>         at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(Poo
lTcpEndpoint.java:528)
>         at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(
LeaderFollowerWorkerThread.java:81)
>         at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.ru
n(ThreadPool.java:685)
>         at java.lang.Thread.run(Thread.java:595)
>