最近用HttpClient进行链接请求，开了多线程之后发现经常有线程hang住，查看线程dump
java.lang.Thread.State: RUNNABLE ???at java.net.SocketInputStream.socketRead0(Native Method) ???at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) ???at java.net.SocketInputStream.read(SocketInputStream.java:170) ???at java.net.SocketInputStream.read(SocketInputStream.java:141) ???at org.apache.http.impl.io.SessionInputBufferImpl.streamRead(SessionInputBufferImpl.java:139) ???at org.apache.http.impl.io.SessionInputBufferImpl.fillBuffer(SessionInputBufferImpl.java:155) ???at org.apache.http.impl.io.SessionInputBufferImpl.readLine(SessionInputBufferImpl.java:284) ???at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:140) ???at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:57) ???at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:261) ???at org.apache.http.impl.DefaultBHttpClientConnection.receiveResponseHeader(DefaultBHttpClientConnection.java:165) ???at org.apache.http.impl.conn.CPoolProxy.receiveResponseHeader(CPoolProxy.java:167) ???at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:272) ???at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:124) ???at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:271) ???at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184) ???at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88) ???at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ???at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184) ???at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:71) ???at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:220) ???at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:164) ???at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:139)
一直就停留在java.net.SocketInputStream.socketRead0 这个Native方法，单步调试了之后发现timeout参数也传入了，后来在网上搜索发现这个是jdk一个bug
https://stackoverflow.com/questions/25968769/got-stuck-at-java-net-socketinputstream-socketread0native-method
https://bugs.openjdk.java.net/browse/JDK-8075484
我用的是8u111貌似不在修复列表，下了8u144
记录一个使用HttpClient过程中的一个bug
原文地址：http://www.cnblogs.com/lcxdever/p/7481912.html