java.net.sockettimeoutexception: read timed out的问题

"

client有如下伪代码：

<code class=""java"">try{ Socket ss = new Socket(); ss.connect(new InetSocketAddress(127.0.0.1, TCPServer.LISTEN_PORT), 4000); ss.setSoTimeout(5000);

//dosomthing
InputStream is = ss.getInputStrean();
log.info("read start time:" + System.currentTimeMillis())
int r = is.read(....);
log.info("read start time:" + System.currentTimeMillis())

} catch(Exception e){ log.info("throw exception time:" + System.currentTimeMillis()); }

上面这样的逻辑，ss.setSoTimeout(5000);把读超时设置为5000ms,可经过测试read的时间也不过才619ms 就抛出了如题的异常？