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POIs ResultSet used by celery.group using the wrong method to `add` a result?
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  1. POIs ResultSet used by celery.group using the wrong method to `add` a result?
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    copied!<p>Is <code>ResultSet</code> used by celery.group using the wrong method to <code>add</code> a result?</p> <p>The version of celery I'm using is 3.0.24</p> <h2>the gist</h2> <pre><code># primary celery module celery = Celery(...) # task module from celery import current_app @current_app.task(max_retries=5) def get_page(url): # do stuff to "get page" return page # program from celery import group url = "http://someurl" if not groupresult: groupresult = group([get_page.s(url)]).apply_async() else: async = get_page.delay(url) groupresult.add(async) </code></pre> <h3>and the traceback this produces...</h3> <pre><code>File "/lib/python2.7/site-packages/celery/result.py", line 308, in add self.results.append(result) AttributeError: 'tuple' object has no attribute 'append' </code></pre> <h3>The bottom of <a href="http://hastebin.com/kurecotawa.py" rel="nofollow">this hastebin</a> has the associated celery source code</h3> <hr> <h3>EDIT 0</h3> <p>Some additional info, in case it matters:</p> <p>I'm actually starting my celery worker elsewhere, using <code>-P eventlet</code>, a redis broker, and a redis backend. I have been using this config for a while with success.</p> <p>Also, updated the gist above to be more specific, using <code>current_app</code>.</p> <hr> <h3>EDIT 1</h3> <p>The issue lies in <code>celery/app/builtins.py</code>, around <a href="https://github.com/celery/celery/blob/v3.0.24/celery/app/builtins.py#L200" rel="nofollow">here</a>. I'd have to force <code>results</code> to be a list rather than a tuple before passing it to <code>GroupResult</code> to get this to work.</p> <p>celery: <a href="http://docs.celeryproject.org/en/latest/reference/celery.html#grouping-tasks" rel="nofollow">Grouping Tasks</a></p>
 

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