This is a consequence of YANGTOOLS-663 not being fixed enough. This describes a specific symptom, but there might be bigger issues to fix.

The symptom is status 500 visible in CSIT [0], NullPointerException stacktrace below.

The issue is with binding aware RPC implementations. If the Yang model contains no input statement, the implemented method has no arguments. If the Yang model contains empty input statement, the implemented method has one argument of corresponding generated type. But this [1] line now probably gets non-null input, so the deserialize call fails.

As Carbon release is near, a quick workaround could by to catch the NPE and retry deserialization with no argument. Proper fix would define which components should behave differently based on input statement presence, and which components should not be sensitive to the presence.

Segment of karaf.log with the stacktrace:

2017-03-16 08:13:49,895 | ERROR | qtp950741364-413 | ContainerResponse | 95 - com.sun.jersey.jersey-server - 1.17.0 | The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
java.lang.NullPointerException
at org.opendaylight.mdsal.binding.generator.impl.GeneratedClassLoadingStrategy.loadClass(GeneratedClassLoadingStrategy.java:27)
at Proxybcf3a48a_8d17_407f_ac2a_eb1acc94673c.loadClass(Unknown Source)
at org.opendaylight.mdsal.binding.generator.util.BindingRuntimeContext.getClassForSchema(BindingRuntimeContext.java:375)
at org.opendaylight.yangtools.binding.data.codec.impl.SchemaRootCodecContext$5.load(SchemaRootCodecContext.java:90)
at org.opendaylight.yangtools.binding.data.codec.impl.SchemaRootCodecContext$5.load(SchemaRootCodecContext.java:84)
at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527)
at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2319)
at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282)
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2197)
at com.google.common.cache.LocalCache.get(LocalCache.java:3937)
at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3941)
at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4824)
at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4830)
at org.opendaylight.yangtools.binding.data.codec.impl.SchemaRootCodecContext.getOrRethrow(SchemaRootCodecContext.java:242)
at org.opendaylight.yangtools.binding.data.codec.impl.SchemaRootCodecContext.getRpc(SchemaRootCodecContext.java:169)
at org.opendaylight.yangtools.binding.data.codec.impl.BindingCodecContext.getRpcDataContext(BindingCodecContext.java:217)
at org.opendaylight.yangtools.binding.data.codec.impl.BindingNormalizedNodeCodecRegistry.fromNormalizedNodeRpcData(BindingNormalizedNodeCodecRegistry.java:203)
at org.opendaylight.controller.md.sal.binding.impl.BindingDOMRpcImplementationAdapter.deserilialize(BindingDOMRpcImplementationAdapter.java:81)
at org.opendaylight.controller.md.sal.binding.impl.BindingDOMRpcImplementationAdapter.invokeRpc(BindingDOMRpcImplementationAdapter.java:71)
at org.opendaylight.controller.md.sal.dom.broker.impl.GlobalDOMRpcRoutingTableEntry.invokeRpc(GlobalDOMRpcRoutingTableEntry.java:39)
at org.opendaylight.controller.md.sal.dom.broker.impl.DOMRpcRoutingTable.invokeRpc(DOMRpcRoutingTable.java:177)
at org.opendaylight.controller.md.sal.dom.broker.impl.DOMRpcRouter.invokeRpc(DOMRpcRouter.java:102)
at Proxyda8865b7_7c03_49a8_9a37_c706952a3ea5.invokeRpc(Unknown Source)
at org.opendaylight.netconf.sal.restconf.impl.BrokerFacade.invokeRpc(BrokerFacade.java:497)[287:org.opendaylight.netconf.sal-rest-connector:1.5.0.SNAPSHOT]
at org.opendaylight.netconf.sal.restconf.impl.RestconfImpl.invokeRpc(RestconfImpl.java:467)[287:org.opendaylight.netconf.sal-rest-connector:1.5.0.SNAPSHOT]
at org.opendaylight.netconf.sal.restconf.impl.StatisticsRestconfServiceWrapper.invokeRpc(StatisticsRestconfServiceWrapper.java:83)[287:org.opendaylight.netconf.sal-rest-connector:1.5.0.SNAPSHOT]
at org.opendaylight.netconf.sal.rest.impl.RestconfCompositeWrapper.invokeRpc(RestconfCompositeWrapper.java:64)[287:org.opendaylight.netconf.sal-rest-connector:1.5.0.SNAPSHOT]
at sun.reflect.GeneratedMethodAccessor104.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.8.0_121]
at java.lang.reflect.Method.invoke(Method.java:498)[:1.8.0_121]
at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)[95:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)[95:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)[95:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)[95:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)[95:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.uri.rules.ResourceObjectRule.accept(ResourceObjectRule.java:100)[95:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)[95:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)[95:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1511)[95:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1442)[95:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391)[95:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381)[95:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)[254:com.sun.jersey.servlet:1.17.0]
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)[254:com.sun.jersey.servlet:1.17.0]
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)[254:com.sun.jersey.servlet:1.17.0]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)[66:org.apache.geronimo.specs.geronimo-servlet_3.0_spec:1.0.0]
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1507)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.servlets.CrossOriginFilter.handle(CrossOriginFilter.java:247)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.servlets.CrossOriginFilter.doFilter(CrossOriginFilter.java:210)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1478)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:82)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:256)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1478)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.opendaylight.aaa.filterchain.filters.CustomFilterAdapter.doFilter(CustomFilterAdapter.java:85)[270:org.opendaylight.aaa.filterchain:0.5.0.SNAPSHOT]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1478)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61)[266:org.apache.shiro.web:1.3.2]
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108)[266:org.apache.shiro.web:1.3.2]
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137)[266:org.apache.shiro.web:1.3.2]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)[266:org.apache.shiro.web:1.3.2]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)[266:org.apache.shiro.web:1.3.2]
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108)[266:org.apache.shiro.web:1.3.2]
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137)[266:org.apache.shiro.web:1.3.2]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)[266:org.apache.shiro.web:1.3.2]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)[266:org.apache.shiro.web:1.3.2]
at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)[266:org.apache.shiro.web:1.3.2]
at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)[266:org.apache.shiro.web:1.3.2]
at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)[265:org.apache.shiro.core:1.3.2]
at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)[265:org.apache.shiro.core:1.3.2]
at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)[265:org.apache.shiro.core:1.3.2]
at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)[266:org.apache.shiro.web:1.3.2]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)[266:org.apache.shiro.web:1.3.2]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1478)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:499)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:69)[80:org.ops4j.pax.web.pax-web-jetty:3.2.9]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:240)[80:org.ops4j.pax.web.pax-web-jetty:3.2.9]
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:427)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:75)[80:org.ops4j.pax.web.pax-web-jetty:3.2.9]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.server.Server.handle(Server.java:370)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:984)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1045)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:861)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:236)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)[71:org.eclipse.jetty.aggregate.jetty-all-server:8.1.19.v20160209]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_121]

[0] https://logs.opendaylight.org/releng/jenkins092/controller-csit-3node-clustering-only-carbon/610/archives/log.html.gz#s1-s13-t3-k2-k2-k1-k3-k7-k1
[1] https://git.opendaylight.org/gerrit/gitweb?p=controller.git;a=blob;f=opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/BindingDOMRpcImplementationAdapter.java;h=a7989ae6ed460813da31004cc830f905d5f7c96d;hb=refs/heads/master#l71