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java.lang.NullPointerException: 	at configurationslicing.executeshell.MavenTargetsSlicer$MavenTargetsSliceSpec.createBuilder(MavenTargetsSlicer.java:36)	at configurationslicing.executeshell.MavenTargetsSlicer$MavenTargetsSliceSpec.createBuilder(MavenTargetsSlicer.java:22)	at configurationslicing.executeshell.AbstractBuildCommandSlicer$AbstractBuildCommandSliceSpec.setValues(AbstractBuildCommandSlicer.java:103)	at configurationslicing.executeshell.AbstractBuildCommandSlicer$AbstractBuildCommandSliceSpec.setValues(AbstractBuildCommandSlicer.java:26)	at configurationslicing.UnorderedStringSlicer.transform(UnorderedStringSlicer.java:100)	at configurationslicing.UnorderedStringSlicer.transform(UnorderedStringSlicer.java:6)	at configurationslicing.ConfigurationSlicing$SliceExecutor.transform(ConfigurationSlicing.java:135)	at configurationslicing.ConfigurationSlicing$SliceExecutor.doSliceconfigSubmit(ConfigurationSlicing.java:179)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:298)	at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:161)	at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:96)	at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:120)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:728)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:858)	at org.kohsuke.stapler.MetaClass$12.dispatch(MetaClass.java:390)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:728)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:858)	at org.kohsuke.stapler.MetaClass$12.dispatch(MetaClass.java:390)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:728)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:858)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:631)	at org.kohsuke.stapler.Stapler.service(Stapler.java:225)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:686)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1494)	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:96)	at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:88)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)	at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:48)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)	at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)	at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)	at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:46)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)	at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1474)	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:499)	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:533)	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:428)	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)	at org.eclipse.jetty.server.Server.handle(Server.java:370)	at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)	at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:960)	at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1021)	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865)	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)	at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:668)	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)	at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:744)