Could you please help me by providing the following additional information?

Does your project contain the package that is not found?

What exactly is the link that you click? Is it really
http://server/hudson/job/smsservice-doc-HEAD/10/findbugsResult/package/?
It should be something like
http://server/hudson/job/smsservice-doc-HEAD/10/findbugsResult/xx.xxxx.utils.misc.web/

Do you have several maven modules in your job?

If possible, please attach the findbugsXml.xml file of your project (or
findbugs.xml).

P.S. do you use version 2.4 of findbugs?

Created an attachment (id=228)
exception log

Created an attachment (id=229)
findbugs.xml

Created an attachment (id=230)
findbugsXml.xml

Thank you for your very fast response.

How can I find out that a package is not found?
In the project are several maven modules.
We are using findBugs Version 1.2.1. ([INFO] Using FindBugs Version: 1.2.1)
We are not using findbugsXml.xml because we get an exception in Hudson (the
Exception is attached in findbugXmlxml.txt).
This was the resean for using findbugs.xml.

In the atachmend you can find a findbugsXml.xml and a findbugs.xml. In the
findbugsXml.xml I removed many AuxClasspathEntry.

Yes we are calling a link like http://server/hudson/job/smsservice-doc-
HEAD/11/findbugsResult/xx.xxxxx.sms.service/

The build is executed on an remote machine. Could this be the problem?

I just tried to reproduce your error. When I read your findbugs.xml file I don't
get the modules and packages overview as there is only one warning and package
and module in it. Do you have several findbugs files in your build?

As you noted in your comments you are have several maven modules?

What is shown, if you go to
http://server/hudson/job/smsservice-doc-HEAD/10/findbugsResult/

Is the module overview shown? Or do you see the packages overview? Or just the
plain warnings? (See WIKI for the different type of views).

Yes this project contains 38 Maven Projects. That there is only on warning could
be correct (The projects is very small).

at http://server/hudson/job/smsservice-doc-HEAD/10/findbugsResult/
I can see a list of all packages (Package Statistics) with there total warnings
or error. But in the row distribution all pictures are broken. If a try to open
the picture I can see the following exception:

avax.servlet.ServletException: java.util.NoSuchElementException: Package not
found: de.jamba.utils.misc.web
org.kohsuke.stapler.Stapler.invoke(Stapler.java:425)
org.kohsuke.stapler.MetaClass$15.dispatch(MetaClass.java:369)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:416)
org.kohsuke.stapler.MetaClass$15.dispatch(MetaClass.java:369)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:416)
org.kohsuke.stapler.MetaClass$9.doDispatch(MetaClass.java:248)

org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:416)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:352)
org.kohsuke.stapler.Stapler.service(Stapler.java:112)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:52)

hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:28)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)

org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)

org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)

org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)

org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:135)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)

org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicProcessingFilter.java:173)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)

org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)

hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:42)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)
hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:44)
hudson.security.HudsonFilter.doFilter(HudsonFilter.java:85)

org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
root cause
java.util.NoSuchElementException: Package not found: de.jamba.utils.misc.web

hudson.plugins.findbugs.util.model.MavenModule.getPackage(MavenModule.java:109)

hudson.plugins.findbugs.FindBugsResult.doPackageStatistics(FindBugsResult.java:651)
sun.reflect.GeneratedMethodAccessor1552.invoke(Unknown Source)

sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:585)
org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:103)
org.kohsuke.stapler.Function.bindAndinvoke(Function.java:57)
org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:69)

org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:416)
org.kohsuke.stapler.MetaClass$15.dispatch(MetaClass.java:369)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:416)
org.kohsuke.stapler.MetaClass$15.dispatch(MetaClass.java:369)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:416)
org.kohsuke.stapler.MetaClass$9.doDispatch(MetaClass.java:248)

org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:416)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:352)
org.kohsuke.stapler.Stapler.service(Stapler.java:112)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:52)

hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:28)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)

org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)

org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)

org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)

org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:135)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)

org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicProcessingFilter.java:173)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)

org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)

hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:42)

hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:55)
hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:44)
hudson.security.HudsonFilter.doFilter(HudsonFilter.java:85)

org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

Hmm, that is totally strange. Why do you see several packages if you just have
one warning in a single package? Could you please attach the build log? Is the
attached findbugs.xml the only findbugs file in your workspace?

Do you use the same package names in different maven modules?

Could you please attach the file findbugs-warnings.xml in the builds folder of
your project?

Thank you for the fast response.
We have many warnings in the packages but in one project we have only one
warning. The most projects contains a findbugs.xml.
By the way we are using a free style project to build our maven project.
I can't find a findbugs-warinigs.xml in our project.
I need a approval of my boss to send the log file. In the case of a problem the
only possibility would be to create a own example project.

The findbugs-warnings.xml file should be in the folder:
server/hudson/job/smsservice-doc-HEAD/builds/[build date]/findbugs-warnings.xml.

Would be cool if you could attach at least this file...

Created an attachment (id=236)
findbugs-warnings.xml

Ok, I managed it to reproduce the problem. No further input needed. Fix will
follow soon...

Fixed in HEAD.

Note: If two pom.xml files use the same <name> property then now the module name
is made unique using a counter.