我使用Grails 3.3.1的RxController特性实现了一个SSE控制器。基本的Observable链如下所示：
class SseController implements RxController {
def index() {
User user = springSecurityService.currentUser
PublishSubject subject = PublishSubject.create()
Observable publishedObservable = subject.publish().autoConnect().observeOn(Schedulers.io())
rx.stream(publishedObservable
.doOnSubscribe {
log.info("User ${user.username} subscribed to notifications with thread ${Thread.currentThread().name}")
}.map {
log.info("User event thread ${Thread.currentThread().name}")
rx.event([type: 'notification'], "${it}")
}.mergeWith(Observable.interval(10, TimeUnit.SECONDS).map {
if (it % 100 == 0) log.info("Sending heartbeat on ${Thread.currentThread().name}")
rx.event("$it")
}.doFinally {
println "Terminating subscriber for ${user.username}"
}))
}
这是一个非常基本的链条，因为我只是在这里建立一个POC。无论如何，它一切正常。我遇到的问题是当用户重新加载浏览器页面，从而关闭原始的EventSource连接时，它会触发一个我似乎无法抑制的堆栈跟踪 - 这是我想做的，因为它与我无关，只会阻塞我的日志。
2018-06-16 10:56:07.044 INFO --- [ionThreadPool-7] o.apache.coyote.http11.Http11Processor : An error occurred in processing while on a non-container thread. The connection will be closed immediately
java.io.IOException: Broken pipe
at sun.nio.ch.FileDispatcherImpl.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:47)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:93)
at sun.nio.ch.IOUtil.write(IOUtil.java:65)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:471)
at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:134)
at org.apache.tomcat.util.net.NioBlockingSelector.write(NioBlockingSelector.java:101)
at org.apache.tomcat.util.net.NioSelectorPool.write(NioSelectorPool.java:157)
at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.doWrite(NioEndpoint.java:1261)
at org.apache.tomcat.util.net.SocketWrapperBase.doWrite(SocketWrapperBase.java:670)
at org.apache.tomcat.util.net.SocketWrapperBase.flushBlocking(SocketWrapperBase.java:607)
at org.apache.tomcat.util.net.SocketWrapperBase.flush(SocketWrapperBase.java:597)
at org.apache.coyote.http11.Http11OutputBuffer.flushBuffer(Http11OutputBuffer.java:581)
at org.apache.coyote.http11.Http11OutputBuffer.flush(Http11OutputBuffer.java:272)
at org.apache.coyote.http11.Http11Processor.flush(Http11Processor.java:1510)
at org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:283)
at org.apache.coyote.Response.action(Response.java:173)
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:317)
at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:284)
at org.apache.catalina.connector.Response.flushBuffer(Response.java:541)
at org.apache.catalina.connector.ResponseFacade.flushBuffer(ResponseFacade.java:312)
at javax.servlet.ServletResponseWrapper.flushBuffer(ServletResponseWrapper.java:176)
at javax.servlet.ServletResponseWrapper.flushBuffer(ServletResponseWrapper.java:176)
at javax.servlet.ServletResponseWrapper.flushBuffer(ServletResponseWrapper.java:176)
at org.springframework.security.web.util.OnCommittedResponseWrapper.flushBuffer(OnCommittedResponseWrapper.java:159)
at org.grails.plugins.rx.web.RxResultSubscriber.onNext(RxResultSubscriber.groovy:178)
at io.reactivex.internal.operators.observable.ObservableFlatMap$MergeObserver.tryEmit(ObservableFlatMap.java:262)
at io.reactivex.internal.operators.observable.ObservableFlatMap$InnerObserver.onNext(ObservableFlatMap.java:559)
at io.reactivex.internal.operators.observable.ObservableDoOnEach$DoOnEachObserver.onNext(ObservableDoOnEach.java:103)
at io.reactivex.internal.operators.observable.ObservableDoFinally$DoFinallyObserver.onNext(ObservableDoFinally.java:82)
at io.reactivex.internal.operators.observable.ObservableMap$MapObserver.onNext(ObservableMap.java:64)
at io.reactivex.internal.operators.observable.ObservableInterval$IntervalObserver.run(ObservableInterval.java:83)
at io.reactivex.internal.schedulers.ScheduledDirectPeriodicTask.run(ScheduledDirectPeriodicTask.java:39)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:308)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
以及
2018-06-16 10:56:07.164 ERROR --- [nio-8080-exec-7] o.g.plugins.rx.web.RxResultSubscriber: Async Dispatch Error: Broken pipe
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:65)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:471)
at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:134)
at org.apache.tomcat.util.net.NioBlockingSelector.write(NioBlockingSelector.java:101)
at org.apache.tomcat.util.net.NioSelectorPool.write(NioSelectorPool.java:157)
at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.doWrite(NioEndpoint.java:1261)
at org.apache.tomcat.util.net.SocketWrapperBase.doWrite(SocketWrapperBase.java:670)
at org.apache.tomcat.util.net.SocketWrapperBase.flushBlocking(SocketWrapperBase.java:607)
at org.apache.tomcat.util.net.SocketWrapperBase.flush(SocketWrapperBase.java:597)
at org.apache.coyote.http11.Http11OutputBuffer.flushBuffer(Http11OutputBuffer.java:581)
at org.apache.coyote.http11.Http11OutputBuffer.flush(Http11OutputBuffer.java:272)
at org.apache.coyote.http11.Http11Processor.flush(Http11Processor.java:1510)
at org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:283)
at org.apache.coyote.Response.action(Response.java:173)
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:317)
at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:284)
at org.apache.catalina.connector.Response.flushBuffer(Response.java:541)
at org.apache.catalina.connector.ResponseFacade.flushBuffer(ResponseFacade.java:312)
at javax.servlet.ServletResponseWrapper.flushBuffer(ServletResponseWrapper.java:176)
at javax.servlet.ServletResponseWrapper.flushBuffer(ServletResponseWrapper.java:176)
at javax.servlet.ServletResponseWrapper.flushBuffer(ServletResponseWrapper.java:176)
at org.springframework.security.web.util.OnCommittedResponseWrapper.flushBuffer(OnCommittedResponseWrapper.java:159)
at org.grails.plugins.rx.web.RxResultSubscriber.onNext(RxResultSubscriber.groovy:178)
at io.reactivex.internal.operators.observable.ObservableFlatMap$MergeObserver.tryEmit(ObservableFlatMap.java:262)
at io.reactivex.internal.operators.observable.ObservableFlatMap$InnerObserver.onNext(ObservableFlatMap.java:559)
at io.reactivex.internal.operators.observable.ObservableDoOnEach$DoOnEachObserver.onNext(ObservableDoOnEach.java:103)
at io.reactivex.internal.operators.observable.ObservableDoFinally$DoFinallyObserver.onNext(ObservableDoFinally.java:82)
at io.reactivex.internal.operators.observable.ObservableMap$MapObserver.onNext(ObservableMap.java:64)
at io.reactivex.internal.operators.observable.ObservableInterval$IntervalObserver.run(ObservableInterval.java:83)
at io.reactivex.internal.schedulers.ScheduledDirectPeriodicTask.run(ScheduledDirectPeriodicTask.java:39)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:308)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
我已经尝试弄清楚我是否可以拦截被抛出堆栈的异常，但无济于事。
有没有人有任何想法如何摆脱这些错误被记录？