java - Apache HttpAsyncClient 在负载下挂起

Question

使用 Apache HttpAsyncClient Beta3，当我将它加载到各种服务器的多达 50 个并发请求时，它似乎开始时很好，我处理了大约 3000 个 url。

但后来我遇到了瓶颈，我通过日志中的对等异常重置了这些连接。此时，异步客户端只是挂起。

如果异步客户端将其作为异常传递给我的回调，则由对等点重置的连接本身就没问题，但我的回调代码没有被调用，整个事情都被锁定了。

2013-02-04 13:52:14,739 ERROR org.apache.http.nio.protocol.HttpAsyncRequestExecutor (I/O dispatcher 9): http-outgoing-139 [ACTIVE] HTTP protocol exception: Connection r
eset by peer
java.io.IOException: Connection reset by peer
        at sun.nio.ch.FileDispatcher.read0(Native Method)
        at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:21)
        at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:202)
        at sun.nio.ch.IOUtil.read(IOUtil.java:175)
        at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:243)
        at org.apache.http.impl.nio.reactor.SessionInputBufferImpl.fill(SessionInputBufferImpl.java:97)
        at org.apache.http.impl.nio.codecs.AbstractMessageParser.fillBuffer(AbstractMessageParser.java:115)
        at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:167)
        at org.apache.http.impl.nio.DefaultHttpClientIODispatch.onInputReady(DefaultHttpClientIODispatch.java:125)
        at org.apache.http.impl.nio.DefaultHttpClientIODispatch.onInputReady(DefaultHttpClientIODispatch.java:50)
        at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:112)
        at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:160)
        at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:342)
        at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:320)
        at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:280)
        at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:106)
        at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:604)
        at java.lang.Thread.run(Thread.java:662)

Answer 1

好吧，我通过切换到 Netty 解决了这个问题，它更加稳定和可预测。