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https://issues.apache.org/jira/browse/HTTPCORE-23?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oleg Kalnichevski updated HTTPCORE-23:
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Fix Version/s: 4.0-alpha4
Priority: Critical (was: Major)
> Threading issue with NIO extensions for client side code
> --------------------------------------------------------
>
> Key: HTTPCORE-23
> URL: https://issues.apache.org/jira/browse/HTTPCORE-23
> Project: HttpComponents Core
> Issue Type: Bug
> Components: HttpCore NIO
> Affects Versions: 4.0-alpha3
> Reporter: Asankha C. Perera
> Assigned To: Oleg Kalnichevski
> Priority: Critical
> Fix For: 4.0-alpha4
>
> Attachments: nio_patch_1.patch
>
>
> I would like to write a non-blocking client based on the NIO extensions, but
> encounter an issue, which could be reproduced with a modified NHttpClient
> example code as follows:
> I want to start off a ConnectingIOReactor, and leave it running continuously.
> Now, whenever I want to send a request through this reactor, I would want to
> execute something like
> ioReactor.connect(
> new InetSocketAddress("www.yahoo.com", 80),
> null,
> new HttpHost("www.yahoo.com"));
> However, if I execute the above before I execute
> ioReactor.execute(ioEventDispatch), i.e position 1, then everything works
> fine. If I try it after (i.e. position 2) the outcome is unpredictable - i.e.
> works sometimes, NPE, etc..
> It is not clear to me why connecting to the reactor after its execute()
> method is invoked should be any different..?
> public static void main(String[] args) throws Exception {
> HttpParams params = new DefaultHttpParams(null);
> .....
> NHttpClientHandler handler = new MyNHttpClientHandler(params);
> final IOEventDispatch ioEventDispatch = new
> DefaultClientIOEventDispatch(handler, params);
> // position 1 Thread t = new Thread(new Runnable() {
> public void run() {
> try {
> ioReactor.execute(ioEventDispatch);
> } catch (Exception e) {
> e.printStackTrace();
> }
> }
> }
> );
> t.start();
> // position 2
> }
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