infinite loop in ContentInputStream.close()

[Kireet Reddy <ki...@feedly.com>]

I recently started using HttpAsyncClient but occasionally my code would
hang. After debugging, I found that ContentInputStream.close() would get
stuck in an infinite loop at line 86 when there is no content in the
SimpleInputBuffer. Is this a known issue? For now I just did a workaround
by using a response consumer that produces a single whitespace character
response when there is no content.

Thanks.

Re: infinite loop in ContentInputStream.close()

[Jean-Marc Spaggiari <je...@spaggiari.org>]

Hi Kireet,

To avoid such issues (I faces many time issues where it's not
responsing or timeout is not respected), I have implemented something
like that and I'm doing all the calls that way. I might be possible to
improve it. I did it very quickly.

JM


	public HttpResponse executeSafe (final DefaultHttpClient client,
final HttpUriRequest method) throws Exception
	{
		final HttpResponsResult result = new HttpResponsResult ();
		Thread thread = new Thread("executeSafe")
		{
			public void run ()
			{
				try
				{
					result.result = client.execute (method);
				}
				catch (NullPointerException e)
				{
					result.npe = e;
				}				
				catch (ClientProtocolException e)
				{
					result.cpe = e;
				}
				catch (IOException e)
				{
					result.ioe = e;
				}
				catch (Exception e)
				{
			        System.out.println("Initial set of cookies:");
			        List<Cookie> cookies = client.getCookieStore().getCookies();
			        if (cookies.isEmpty()) {
			            System.out.println("None");
			        } else {
			            for (int i = 0; i < cookies.size(); i++) {
			                System.out.println("- " + cookies.get(i).toString());
			            }
			        }
					result.e = e;
				}
			}
		};
		thread.start();
		
		long timeout = System.currentTimeMillis() + 45 * 1000; // Exit after
45 seconds and ignore the respons.
		
		while (thread.isAlive() && (System.currentTimeMillis() < timeout))
		{
			try{Thread.sleep (10);} catch (InterruptedException e){e.printStackTrace();}
		}
		if (thread.isAlive())
		{
			System.out.println (currentThread().getName() + " Timeout! Killing
it! " + method.getURI());
			method.abort();
			thread.interrupt();
		}
		
		if (result.cpe != null)
			throw result.cpe;
		if (result.ioe != null)
			throw result.ioe;
		if (result.e != null)
			throw result.e;
		if (result.npe != null)
			exit = true;
		
		return result.result;
	}


2012/8/18, Kireet Reddy <ki...@feedly.com>:
> I recently started using HttpAsyncClient but occasionally my code would
> hang. After debugging, I found that ContentInputStream.close() would get
> stuck in an infinite loop at line 86 when there is no content in the
> SimpleInputBuffer. Is this a known issue? For now I just did a workaround
> by using a response consumer that produces a single whitespace character
> response when there is no content.
>
> Thanks.
>

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