PRECONDITION_FAILED on x-expires about celery-php HOT 13 CLOSED

Do you have any tips on reproducing this problem? I'm running this code in production for months and had no such issues.

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I'm not sure what causes this but it only happens when the results are sent via AMQP. The results are set to JSON as instructed.

I'm using the latest RabbitMQ from their website on Ubuntu 11.10 with the latest pecl amqp module.

from celery-php.

I have googled this error and found this thread:

https://groups.google.com/forum/#!msg/celery-users/LhR5oDEWWqg/rK0fugcF76QJ

they have identified both a temporary fix that you may want to use and a
cause, which I will try to fix given some free time.

from celery-php.

I've found the same but that case does not apply since its a one-node rabbit-mq + celery setup.
The suggested expires has no effect on the error unfortunately.

When I use a SQLAlchemy results backend or simply not query for status trough this library it "works", but still weird that an easy out-of-the-box setup is already showing these issues.

from celery-php.

Out-of-the-box setup is failing because Celery changed their protocol from 2.3 to 2.4, and apparently nobody tested the library with 2.4 before you.

I know how to fix it, but the AMQP extension from PECL doesn't support sending arbitrary arguments when declaring a queue. Unfortunately this is required for supporting Celery 2.4. The lead maintainer of pecl extension seems to be working on that:
http://old.nabble.com/Queue.declare-arguments-td32629218.html

I'll ask him how it's going.

from celery-php.

Hi GDR!

Looks like celery-php is completely incompatible with recent version of php-amqp.

root@dev:/tmp# php test.php
PHP Warning: AMQPExchange::__construct() expects exactly 1 parameter, 2 given in /tmp/celery.php on line 86
Segmentation fault

From docs on php.net

public AMQPExchange::__construct ( AMQPChannel $amqp_channel )

from celery-php.

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Andrew,

I need to publish a branch that works with php-amqp 1.0.0. It's ready
but not tested too much. I will do it in the next days.

Unfortunately it will not solve the original problem with Celery 2.6 too.
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from celery-php.

Dziękuję bardzo!

Unfortunately it will not solve the original problem with Celery 2.6 too.

IMO, not a big deal! I think it is not a big problem to install old compatible version of celery with pip. Much more problems (at least for me) to install some old stuff with pecl.

So, looking forward for new version and thanks alot for your work.

from celery-php.

frutik - #4 - I'd like to see your input.

from celery-php.

More info about 2.4 compatibility - PHP-AMQP v 1.0.0+ supports arguments but gives them a type incompatible with Celery (int vs long). PHP-AMQP author isn't going to fix it anytime soon, I'll ask Celery developers if there's something they can do.

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The solution to make it work with newer Celery versions was to add the following line to celeryconfig.py:

CELERY_TASK_RESULT_EXPIRES = None

If you have a working celery installation, you may have to delete vhost from rabbitmq and create it again.

Issue solved thanks to Ask Solem Hoel https://github.com/ask/celery/issues/642#issuecomment-4574077

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Note - the unit tests have passed for Celery 2.5.1 with forementioned setting.

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i've add some feature to support x-expire to keep consistent with python-celeryd's config

skysbird@d86f3cc

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