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Posted to commits@harmony.apache.org by "Tim Ellison (JIRA)" <ji...@apache.org> on 2008/03/05 10:33:40 UTC
[jira] Closed: (HARMONY-5530) Selector.select() returns exception
if network connection is lost
[ https://issues.apache.org/jira/browse/HARMONY-5530?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tim Ellison closed HARMONY-5530.
--------------------------------
> Selector.select() returns exception if network connection is lost
> -----------------------------------------------------------------
>
> Key: HARMONY-5530
> URL: https://issues.apache.org/jira/browse/HARMONY-5530
> Project: Harmony
> Issue Type: Bug
> Components: Classlib
> Affects Versions: 5.0M4
> Environment: Only test on Win32, Linux unknown at this time.
> Reporter: Phil Loats
> Assignee: Tim Ellison
>
> This problem was seen on version "harmony-jdk-603534"
> When Selector.select() is called with an empty list, then the network connection is lost - an exception is thrown to the caller.
> This behavior is different from J2SE 1.5 where it continues to wait without throwing an exception.
> The following test code will show this problem:
> import java.io.IOException;
> import java.nio.channels.Selector;
> public class Test {
> public static void main(String[] args) {
> Selector selector = null;
>
> try {
> selector = Selector.open();
> System.out.println("selector open...");
> } catch (IOException e) {
> }
>
> // Wait for events
> while (true) {
> try {
> // Wait for an event
> System.out.println("Waiting on selector...");
> selector.select();
> } catch (IOException e) {
> // Handle error with selector
> e.printStackTrace();
> break;
> }
> }
> System.out.println("done...");
> }
> }
> Start the testcase, it will pause at "Waiting on selector..." message. Bring down the network connection ("ipconfig /release" I use), the following exception is thrown:
> selector open...
> Waiting on selector...
> java.net.SocketException: The connection was reset
> at org.apache.harmony.luni.platform.OSNetworkSystem.readSocketImpl(OSNetworkSystem.java)
> at org.apache.harmony.luni.platform.OSNetworkSystem.read(OSNetworkSystem.java:89)
> at org.apache.harmony.nio.internal.SocketChannelImpl.readImpl(SocketChannelImpl.java:459)
> at org.apache.harmony.nio.internal.SocketChannelImpl.read(SocketChannelImpl.java:377)
> at org.apache.harmony.nio.internal.PipeImpl$SourceChannelImpl.read(PipeImpl.java:133)
> at org.apache.harmony.nio.internal.SelectorImpl.processSelectResult(SelectorImpl.java:526)
> at org.apache.harmony.nio.internal.SelectorImpl.selectInternal(SelectorImpl.java:474)
> at org.apache.harmony.nio.internal.SelectorImpl.select(SelectorImpl.java:432)
> at Test.main(Test.java:30)
> done...
> Again, J2SE 1.5 remains paused at "Waiting..." when the network is lost or regained.
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