此SocketException在ObjectInputStream.readObject（）方法中引发，这是什么原因引起的呢？此外，客户端和服务器套接字的soTimeout值均为0，而KeepAlive值为false。
{2012-01-09 17:44:13,908} ERROR java.net.SocketException: Connection timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:146)
at sun.security.ssl.InputRecord.readFully(InputRecord.java:312)
at sun.security.ssl.InputRecord.read(InputRecord.java:350)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:809)
at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:766)
at sun.security.ssl.AppInputStream.read(AppInputStream.java:94)
at sun.security.ssl.AppInputStream.read(AppInputStream.java:69)
at java.io.ObjectInputStream$PeekInputStream.peek(ObjectInputStream.java:2265)
at java.io.ObjectInputStream$BlockDataInputStream.peek(ObjectInputStream.java:2558)
at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2568)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1314)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368)
从有关setSoTimeout方法的JAVA API文档中，如果此方法设置为非零值，则当时间到期时，仅引发SocketTimeoutException，而不引发SocketException：Connection超时，因此，此异常不应与setSotimeoutMethod相关。
public void setSoTimeout(int timeout) throws SocketException
Enable/disable SO_TIMEOUT with the specified timeout, in milliseconds. With this
option set to a non-zero timeout, a read() call on the InputStream associated with
this Socket will block for only this amount of time. If the timeout …