jetty.io.EofException java.io.IOException: Broken pipe

徐冬丽

　　在apache + mod_proxy + jetty下，单台服务器，50并发情况下，jetty异常

Caused by: org.eclipse.jetty.io.EofException
at org.eclipse.jetty.http.HttpGenerator.flushBuffer(HttpGenerator.java:912)
at org.eclipse.jetty.http.AbstractGenerator.blockForOutput(AbstractGenerator.java:499)
at org.eclipse.jetty.http.AbstractGenerator.flush(AbstractGenerator.java:430)
at org.eclipse.jetty.server.HttpOutput.flush(HttpOutput.java:84)
at org.eclipse.jetty.server.HttpConnection$Output.flush(HttpConnection.java:1140)
at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:165)
at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:92)
at java.io.ByteArrayOutputStream.writeTo(ByteArrayOutputStream.java:109)
at org.eclipse.jetty.server.HttpWriter.write(HttpWriter.java:258)
at org.eclipse.jetty.server.HttpWriter.write(HttpWriter.java:107)
at org.eclipse.jetty.server.HttpWriter.write(HttpWriter.java:96)
at org.eclipse.jetty.io.UncheckedPrintWriter.write(UncheckedPrintWriter.java:271)
... 35 more
Caused by: java.io.IOException: Broken pipe
at sun.nio.ch.FileDispatcher.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:29)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:72)
at sun.nio.ch.IOUtil.write(IOUtil.java:28)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:334)
at org.eclipse.jetty.io.nio.ChannelEndPoint.flush(ChannelEndPoint.java:187)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.flush(SelectChannelEndPoint.java:277)
at org.eclipse.jetty.http.HttpGenerator.flushBuffer(HttpGenerator.java:856)
... 46 more
　　mod_proxy配置如下：

<IfModule mod_proxy.c>
ProxyRequests Off
ProxyPreserveHost On
<Directory proxy:*>
Order deny,allow
Allow from all
</Directory>
ProxyPassMatch ^/(stream|user|friend|suggest|notice|upload|privatemsg|comment|common|search|score|ta|tfa)/(.*)$ http://localhost:8080 min=5 smax=16 ttl=6
00 timeout=100
</IfModule>
　　找到两种解决方法，但都无法根治问题，实际上只是使得jetty不再抛出异常
　　1、在环境变量中设置： _JAVA_SR_SIGNUM = 12
　　参考：https://www.evernote.com/shard/s95/sh/33fe6db4-03a2-45d5-b7a3-6a6c35e5d864/a88a0f85148d56fe96e3b0df83ff7349
　　2、将jetty io类UncheckedPrintWriter crack掉
　　其中的属性_throwUnchecked=true正式控制异常是否向上抛出的开关，把它修改掉，然后将这个class单独打成jar包。
　　参考：http://benni82.iteye.com/blog/840878