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POUnexplained SocketException in Java client connecting to localhost
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  1. POUnexplained SocketException in Java client connecting to localhost
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    copied!<p>I have a Java program running on an iSeries which connects to a server process on the same host. Here's an edited version of the Java client code:</p> <pre><code>while (true) { try { socket = new Socket(myHost, myPort); } catch (UnknownHostException ex) { // Quit } catch (ConnectException ex) { // Wait for a while and retry continue; } catch (IOException ex) { // Quit } break; } // Do stuff with socket... </code></pre> <p>Occasionally, on calling the Socket() constructor, I get a SocketException which falls into the IOException handler which exits the application (this might be a slightly harsh reaction but I don't want to change this until I understand the issue more fully). Here's the stack trace:</p> <pre><code>java.net.SocketException: A connection with a remote socket was reset by that at java.lang.Throwable.&lt;init&gt;(Throwable.java:195) at java.lang.Exception.&lt;init&gt;(Exception.java:41) at java.io.IOException.&lt;init&gt;(IOException.java:40) at java.net.SocketException.&lt;init&gt;(SocketException.java:29) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158) at java.net.Socket.connect(Socket.java:488) at java.net.Socket.connect(Socket.java:438) at java.net.Socket.&lt;init&gt;(Socket.java:148) at com.foo.AccessObject.&lt;init&gt;(AccessObject.java:36) </code></pre> <p>I understand that if I am reading from a socket and the other peer closes it, that I will get a SocketException. I also understand that if the connection fails I will get a ConnectionException. What I don't understand is how I can get a SocketException on creating a Socket. I think I can eliminate dodgy network devices as the connection is going to localhost. </p> <p>I can potentially work around this issue by catching SocketException instead of ConnectionException but I don't want to mask this issue, at least until I understand it more. Does anyone have any ideas about what could be causing the error?</p>
 

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