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celery: upgrade to Celery 3
Celery 3 is more than 2 and is the future and should be more stable than Celery 2.
There might be problems like
PRECONDITION_FAILED - cannot redeclare exchange 'celeryresults' in vhost 'kallithea' with different type, durable, internal or autodelete value
when celery is upgraded and it tries to upgrade existing tasks.
One way to avoid that problem:
- make sure celery has run to completion and there are no important pending tasks,
- delete the old vhost,
- upgrade celery,
- create new vhost
- set permissions for vhost
- profit
Celery 3 is more than 2 and is the future and should be more stable than Celery 2.
There might be problems like
PRECONDITION_FAILED - cannot redeclare exchange 'celeryresults' in vhost 'kallithea' with different type, durable, internal or autodelete value
when celery is upgraded and it tries to upgrade existing tasks.
One way to avoid that problem:
- make sure celery has run to completion and there are no important pending tasks,
- delete the old vhost,
- upgrade celery,
- create new vhost
- set permissions for vhost
- profit
4d076981a7b1 4d076981a7b1 4d076981a7b1 e73a69cb98dc 4d076981a7b1 4d076981a7b1 4e6dfdb3fa01 4e6dfdb3fa01 4d076981a7b1 4e6dfdb3fa01 4d076981a7b1 fbbe80e3322b 03bbd33bc084 4d076981a7b1 4d076981a7b1 4e6dfdb3fa01 4e6dfdb3fa01 4e6dfdb3fa01 4e6dfdb3fa01 097327aaf2ad 4d076981a7b1 4d076981a7b1 03bbd33bc084 4d076981a7b1 4d076981a7b1 4e6dfdb3fa01 4e6dfdb3fa01 87ac42db389c 4e6dfdb3fa01 4e6dfdb3fa01 4e6dfdb3fa01 4e6dfdb3fa01 4e6dfdb3fa01 | .. _debugging:
===================
Debugging Kallithea
===================
If you encounter problems with Kallithea, here are some instructions
on how to debug them.
.. note:: First make sure you're using the latest version available.
Enable detailed debug
---------------------
Kallithea uses the standard Python ``logging`` module to log its output.
By default only loggers with ``INFO`` level are displayed. To enable full output
change ``level = DEBUG`` for all logging handlers in the currently used .ini file.
This change will allow you to see much more detailed output in the log file or
console. This generally helps a lot to track issues.
Enable interactive debug mode
-----------------------------
To enable interactive debug mode simply comment out ``set debug = false`` in
the .ini file. This will trigger an interactive debugger each time
there is an error in the browser, or send a http link if an error occurred in the backend. This
is a great tool for fast debugging as you get a handy Python console right
in the web view.
.. warning:: NEVER ENABLE THIS ON PRODUCTION! The interactive console
can be a serious security threat to your system.
|