sometime a thread cost cpu 100%

My web app deploy in Wildfly9.0.2 and the wildfly use Undertow1.2.9, jdk1.8.0_45

But sometime cpu rise to 100%; I dump the jvm thread and point to this this and stack info:

"default task-17" #161 prio=5 os_prio=0 tid=0x0000000018733000 nid=0x162c runnable [0x0000000019bbe000]"default task-17" #161 prio=5 os_prio=0 tid=0x0000000018733000 nid=0x162c runnable [0x0000000019bbe000]   java.lang.Thread.State: RUNNABLE at sun.nio.ch.SocketDispatcher.read0(Native Method) at sun.nio.ch.SocketDispatcher.read(Unknown Source) at sun.nio.ch.IOUtil.readIntoNativeBuffer(Unknown Source) at sun.nio.ch.IOUtil.read(Unknown Source) at sun.nio.ch.SocketChannelImpl.read(Unknown Source) - locked <0x00000000aab2b5c8> (a java.lang.Object) at org.xnio.nio.NioSocketConduit.read(NioSocketConduit.java:282) at org.xnio.conduits.AbstractStreamSourceConduit.read(AbstractStreamSourceConduit.java:51) at org.xnio.ssl.JsseSslStreamSourceConduit.read(JsseSslStreamSourceConduit.java:84) - locked <0x00000000aab2d420> (a org.xnio.ByteBufferSlicePool$PooledByteBuffer) at org.xnio.conduits.AbstractStreamSourceConduit.read(AbstractStreamSourceConduit.java:51) at io.undertow.conduits.ReadDataStreamSourceConduit.read(ReadDataStreamSourceConduit.java:67) at io.undertow.conduits.FixedLengthStreamSourceConduit.read(FixedLengthStreamSourceConduit.java:249) at org.xnio.conduits.ConduitStreamSourceChannel.read(ConduitStreamSourceChannel.java:127) at io.undertow.channels.DetachableStreamSourceChannel.read(DetachableStreamSourceChannel.java:209) at io.undertow.server.HttpServerExchange$ReadDispatchChannel.read(HttpServerExchange.java:2136) at org.xnio.channels.Channels.readBlocking(Channels.java:294) at io.undertow.servlet.spec.ServletInputStreamImpl.readIntoBuffer(ServletInputStreamImpl.java:170) at io.undertow.servlet.spec.ServletInputStreamImpl.read(ServletInputStreamImpl.java:146) at org.glassfish.jersey.message.internal.EntityInputStream.read(EntityInputStream.java:102) at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream.read(ReaderInterceptorExecutor.java:296) at sun.nio.cs.StreamDecoder.readBytes(Unknown Source) at sun.nio.cs.StreamDecoder.implRead(Unknown Source) at sun.nio.cs.StreamDecoder.read(Unknown Source) - locked <0x00000000aab369f0> (a java.io.InputStreamReader) at java.io.InputStreamReader.read(Unknown Source) at java.io.Reader.read(Unknown Source) at org.glassfish.jersey.message.internal.ReaderWriter.readFromAsString(ReaderWriter.java:175) at org.glassfish.jersey.message.internal.ReaderWriter.readFromAsString(ReaderWriter.java:160) at org.glassfish.jersey.message.internal.AbstractMessageReaderWriterProvider.readFromAsString(AbstractMessageReaderWriterProvider.java:117) at org.glassfish.jersey.message.internal.StringMessageProvider.readFrom(StringMessageProvider.java:77) at org.glassfish.jersey.message.internal.StringMessageProvider.readFrom(StringMessageProvider.java:59) at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.invokeReadFrom(ReaderInterceptorExecutor.java:256) at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.aroundReadFrom(ReaderInterceptorExecutor.java:235) at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor.proceed(ReaderInterceptorExecutor.java:155) at org.glassfish.jersey.server.internal.MappableExceptionWrapperInterceptor.aroundReadFrom(MappableExceptionWrapperInterceptor.java:74) at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor.proceed(ReaderInterceptorExecutor.java:155) at org.glassfish.jersey.message.internal.MessageBodyFactory.readFrom(MessageBodyFactory.java:1085) at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:874) at org.glassfish.jersey.server.ContainerRequest.readEntity(ContainerRequest.java:271) at org.glassfish.jersey.server.internal.inject.EntityParamValueFactoryProvider$EntityValueFactory.provide(EntityParamValueFactoryProvider.java:96) at org.glassfish.jersey.server.spi.internal.ParamValueFactoryWithSource.provide(ParamValueFactoryWithSource.java:71) at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.getParameterValues(ParameterValueHelper.java:94) at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$AbstractMethodParamInvoker.getParamValues(JavaResourceMethodDispatcherProvider.java:127) at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99) at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102) at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) at org.glassfish.jersey.internal.Errors.process(Errors.java:315) at org.glassfish.jersey.internal.Errors.process(Errors.java:297) at org.glassfish.jersey.internal.Errors.process(Errors.java:267) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305) at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154) at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473) at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228) at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:86) at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:72) at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:282) at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:261) at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:80) at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:172) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:199) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:774) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)
   Locked ownable synchronizers: - <0x00000000857808c0> (a java.util.concurrent.ThreadPoolExecutor$Worker)