什么会导致套接字写入抛出连接超时异常

Question

What will cause a write() method throws Connection timeout exception?

java.net.SocketException: Connection timed out

    at java.net.SocketOutputStream.socketWrite0(Native Method)
    at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109)
    at java.net.SocketOutputStream.write(SocketOutputStream.java:153)
    at org.apache.http.impl.io.SessionOutputBufferImpl.streamWrite(SessionOutputBufferImpl.java:126)
    at org.apache.http.impl.io.SessionOutputBufferImpl.write(SessionOutputBufferImpl.java:162)
    at org.apache.http.impl.io.ContentLengthOutputStream.write(ContentLengthOutputStream.java:115)
    at org.apache.http.entity.ByteArrayEntity.writeTo(ByteArrayEntity.java:116)

Answer 1

Connection died (on the way or opposite side of the channel), because for example no communication did not occur for a long time. This can be resolved (if you need to) by applying keepAlives on the socket.

In huge majority of cases - from what I have seen - this is normal behavior exception, because the network partitions do happen from time (this would be a problem if the communication is only in your data center and the exception is common). But if its related to server-client (browser) communication, there should be nothing to worry about.