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POAndroid Network Programming: IOExceptions and StackOverflowError
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  1. POAndroid Network Programming: IOExceptions and StackOverflowError
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    copied!<p>In my Android app, I try to connect to a port on a local server to get some packets. I've encased to code in some try &amp; catch's but with the following code:</p> <pre><code>address = "192.168.175.82"; public void run() { try { smtpSocket = new Socket(address, 60001); os = new DataOutputStream(smtpSocket.getOutputStream()); is = new DataInputStream(smtpSocket.getInputStream()); } catch (UnknownHostException e) { System.err.println("Don't know about host: " + address); run(); } catch (IOException e) { System.err.println("Couldn't get I/O for the connection to: " + address); run(); } catch (Exception e) { System.out.println("retry"); run(); } </code></pre> <p>if ther server is not on, I obviously get the IOException a few times (e.g. a few hundred times) before I get a stack overflow error and the app crashes.</p> <pre><code>01-20 22:21:32.526: ERROR/AndroidRuntime(5678): java.lang.StackOverflowError 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at java.util.Hashtable.get(Hashtable.java:282) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at java.util.Properties.getProperty(Properties.java:177) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at java.lang.System.getProperty(System.java:440) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at java.lang.System.getProperty(System.java:412) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at java.lang.Boolean.getBoolean(Boolean.java:174) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at org.apache.harmony.luni.net.NetUtil$Action.run(NetUtil.java:89) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at org.apache.harmony.luni.net.NetUtil$Action.run(NetUtil.java:80) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at java.security.AccessController.doPrivilegedImpl(AccessController.java:264) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at java.security.AccessController.doPrivileged(AccessController.java:84) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at org.apache.harmony.luni.net.NetUtil.preferIPv6Addresses(NetUtil.java:51) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at org.apache.harmony.luni.net.PlainSocketImpl.bind(PlainSocketImpl.java:190) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at java.net.Socket.startupSocket(Socket.java:777) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at java.net.Socket.tryAllAddresses(Socket.java:192) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at java.net.Socket.&lt;init&gt;(Socket.java:256) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at java.net.Socket.&lt;init&gt;(Socket.java:220) 01-20 22:21:32.526: ERROR/AndroidRuntime(5678): at com.example.sockets.ReadSocket.run(ReadSocket.java:83) </code></pre> <p>Could anyone please point me in the right direction of how to get this to work? Perhaps I should test the connection first somehow (if so, please say how?) Thanks</p> <p>Chris</p>
 

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