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正常运行的服务，突然报了异常
An I/O error has occurred while writing a response message entity to the container output stream.
org.glassfish.jersey.server.internal.process.MappableException: java.io.IOException: Connection is closed
at org.glassfish.jersey.server.internal.MappableExceptionWrapperInterceptor.aroundWriteTo(MappableExceptionWrapperInterceptor.java:92)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
at org.glassfish.jersey.logging.LoggingInterceptor.aroundWriteTo(LoggingInterceptor.java:225)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
at org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo(MessageBodyFactory.java:1130)
at org.glassfish.jersey.server.ServerRuntime$Responder.writeResponse(ServerRuntime.java:711)
at org.glassfish.jersey.server.ServerRuntime$Responder.processResponse(ServerRuntime.java:444)
at org.glassfish.jersey.server.ServerRuntime$Responder.process(ServerRuntime.java:434)
at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:329)
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.grizzly2.httpserver.GrizzlyHttpContainer.service(GrizzlyHttpContainer.java:384)
at org.glassfish.grizzly.http.server.HttpHandler$1.run(HttpHandler.java:224)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:593)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:573)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: Connection is closed
at org.glassfish.grizzly.nio.NIOConnection.assertOpen(NIOConnection.java:445)
at org.glassfish.grizzly.http.io.OutputBuffer.write(OutputBuffer.java:677)
at org.glassfish.grizzly.http.server.NIOOutputStreamImpl.write(NIOOutputStreamImpl.java:83)
at org.glassfish.jersey.message.internal.CommittingOutputStream.write(CommittingOutputStream.java:229)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$UnCloseableOutputStream.write(WriterInterceptorExecutor.java:299)
at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)
at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:282)
at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:125)
at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:135)
at java.io.OutputStreamWriter.write(OutputStreamWriter.java:220)
at org.glassfish.jersey.message.internal.ReaderWriter.writeToAsString(ReaderWriter.java:192)
at org.glassfish.jersey.message.internal.AbstractMessageReaderWriterProvider.writeToAsString(AbstractMessageReaderWriterProvider.java:130)
at org.glassfish.jersey.message.internal.StringMessageProvider.writeTo(StringMessageProvider.java:99)
at org.glassfish.jersey.message.internal.StringMessageProvider.writeTo(StringMessageProvider.java:59)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.invokeWriteTo(WriterInterceptorExecutor.java:265)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.aroundWriteTo(WriterInterceptorExecutor.java:250)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
at org.glassfish.jersey.server.internal.JsonWithPaddingInterceptor.aroundWriteTo(JsonWithPaddingInterceptor.java:106)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
at org.glassfish.jersey.server.internal.MappableExceptionWrapperInterceptor.aroundWriteTo(MappableExceptionWrapperInterceptor.java:86)
... 21 common frames omitted
Caused by: java.io.IOException: Broken pipe
at sun.nio.ch.FileDispatcherImpl.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:47)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:93)
at sun.nio.ch.IOUtil.write(IOUtil.java:51)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:471)
at org.glassfish.grizzly.nio.transport.TCPNIOUtils.flushByteBuffer(TCPNIOUtils.java:149)
at org.glassfish.grizzly.nio.transport.TCPNIOUtils.writeCompositeBuffer(TCPNIOUtils.java:86)
at org.glassfish.grizzly.nio.transport.TCPNIOAsyncQueueWriter.write0(TCPNIOAsyncQueueWriter.java:129)
at org.glassfish.grizzly.nio.transport.TCPNIOAsyncQueueWriter.write0(TCPNIOAsyncQueueWriter.java:106)
at org.glassfish.grizzly.nio.AbstractNIOAsyncQueueWriter.write(AbstractNIOAsyncQueueWriter.java:260)
at org.glassfish.grizzly.nio.AbstractNIOAsyncQueueWriter.write(AbstractNIOAsyncQueueWriter.java:169)
at org.glassfish.grizzly.nio.AbstractNIOAsyncQueueWriter.write(AbstractNIOAsyncQueueWriter.java:71)
at org.glassfish.grizzly.nio.transport.TCPNIOTransportFilter.handleWrite(TCPNIOTransportFilter.java:126)
at org.glassfish.grizzly.filterchain.TransportFilter.handleWrite(TransportFilter.java:191)
at org.glassfish.grizzly.filterchain.ExecutorResolver$8.execute(ExecutorResolver.java:111)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.filterchain.FilterChainContext.write(FilterChainContext.java:890)
at org.glassfish.grizzly.filterchain.FilterChainContext.write(FilterChainContext.java:858)
at org.glassfish.grizzly.http.io.OutputBuffer.flushBuffer(OutputBuffer.java:1059)
at org.glassfish.grizzly.http.io.OutputBuffer.write(OutputBuffer.java:709)
at org.glassfish.grizzly.http.server.NIOOutputStreamImpl.write(NIOOutputStreamImpl.java:83)
at org.glassfish.jersey.message.internal.CommittingOutputStream.write(CommittingOutputStream.java:233)
... 37 common frames omitted
这是因为在短时间内有大量的并发请求至某个接口，该接口的业务处理时间又长（超过1000ms），导致连接池资源耗尽，引发阻塞，故而报错。
解决方法：
1.重启服务---紧急处理方法
2.增加连接池线程数量---治标的方法
3.增加客户端请求时间，控制客户端请求次数---治标的方法
4.优化业务（精确所需的数据，不必要的不返回），技术上利用分页、缓存等---治本的方法
总结：以上错误的直接原因是，接口处理时间超长，根本原因是业务不合理或者设计不合理。
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