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+ <div class="section" id="retrying-tasks">
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+<h1>Retrying Tasks<a class="headerlink" href="#retrying-tasks" title="Permalink to this headline">¶</a></h1>
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+<div class="section" id="retrying-a-task-if-something-fails">
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+<h2>Retrying a task if something fails<a class="headerlink" href="#retrying-a-task-if-something-fails" title="Permalink to this headline">¶</a></h2>
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+<p>Simply use <a title="celery.task.base.Task.retry" class="reference external" href="../reference/celery.task.base.html#celery.task.base.Task.retry"><tt class="xref docutils literal"><span class="pre">celery.task.base.Task.retry()</span></tt></a> to re-sent the task, it will
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+do the right thing, and respect the <a title="celery.task.base.Task.max_retries" class="reference external" href="../reference/celery.task.base.html#celery.task.base.Task.max_retries"><tt class="xref docutils literal"><span class="pre">celery.task.base.Task.max_retries</span></tt></a>
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+attribute.</p>
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+<div class="highlight-python"><pre>class SendTwitterStatusTask(Task):
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+
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+ def run(self, oauth, tweet, \*\*kwargs):
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+ try:
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+ twitter = Twitter(oauth)
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+ twitter.update_status(tweet)
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+ except (Twitter.FailWhaleError, Twitter.LoginError), exc:
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+ self.retry(args=[oauth, tweet], kwargs=\*\*kwargs, exc=exc)</pre>
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+</div>
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+<p>Here we used the <tt class="docutils literal"><span class="pre">exc</span></tt> argument to pass the current exception to
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+<a title="celery.task.base.Task.retry" class="reference external" href="../reference/celery.task.base.html#celery.task.base.Task.retry"><tt class="xref docutils literal"><span class="pre">celery.task.base.Task.retry()</span></tt></a>. At each step of the retry this exception
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+is available as the tombstone (result) of the task, when
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+<a title="celery.task.base.Task.max_retries" class="reference external" href="../reference/celery.task.base.html#celery.task.base.Task.max_retries"><tt class="xref docutils literal"><span class="pre">celery.task.base.Task.max_retries</span></tt></a> has been exceeded this is the exception
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+raised. However, if an <tt class="docutils literal"><span class="pre">exc</span></tt> argument is not provided the
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+<a title="celery.task.base.RetryTaskError" class="reference external" href="../reference/celery.task.base.html#celery.task.base.RetryTaskError"><tt class="xref docutils literal"><span class="pre">celery.task.base.RetryTaskError</span></tt></a> exception is raised instead.</p>
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+</div>
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+<div class="section" id="setting-a-custom-delay-for-retries">
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+<h2>Setting a custom delay for retries.<a class="headerlink" href="#setting-a-custom-delay-for-retries" title="Permalink to this headline">¶</a></h2>
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+<p>The default countdown is in the tasks
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+<a title="celery.task.base.Task.default_retry_delay" class="reference external" href="../reference/celery.task.base.html#celery.task.base.Task.default_retry_delay"><tt class="xref docutils literal"><span class="pre">celery.task.base.Task.default_retry_delay</span></tt></a> attribute, which by
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+default is set to 3 minutes.</p>
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+<p>You can also provide the <tt class="docutils literal"><span class="pre">countdown</span></tt> argument to
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+<a title="celery.task.base.Task.retry" class="reference external" href="../reference/celery.task.base.html#celery.task.base.Task.retry"><tt class="xref docutils literal"><span class="pre">celery.task.base.Task.retry()</span></tt></a> to override this default.</p>
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+<div class="highlight-python"><pre>class MyTask(Task):
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+ default_retry_delay = 30 * 60 # retry in 30 minutes
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+
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+ def run(self, x, y, \*\*kwargs):
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+ try:
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+ ...
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+ except Exception, exc:
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+ self.retry([x, y], \*\*kwargs, exc=exc,
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+ countdown=60 # override the default and
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+ # retry in 1 minute</pre>
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+ <h3><a href="../index.html">Table Of Contents</a></h3>
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+ <ul>
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+<li><a class="reference external" href="">Retrying Tasks</a><ul>
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+<li><a class="reference external" href="#retrying-a-task-if-something-fails">Retrying a task if something fails</a></li>
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+<li><a class="reference external" href="#setting-a-custom-delay-for-retries">Setting a custom delay for retries.</a></li>
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