To simplify debugging, Qpid provides a logging facility that prints out messaging events.
The Qpidd broker and C++ clients can both use environment variables to enable logging. Linux and Windows systems use the same named environment variables and values.
Use QPID_LOG_ENABLE to set the level of logging you are interested in (trace, debug, info, notice, warning, error, or critical):
The Qpidd broker and C++ clients use QPID_LOG_OUTPUT to determine where logging output should be sent. This is either a file name or the special values stderr, stdout, or syslog:
From a Windows command prompt, use the following command format to set the environment variables:
set QPID_LOG_ENABLE=warning+ set QPID_LOG_TO_FILE=D:\tmp\myclient.out
The Python client library supports logging using the standard Python logging module. The easiest way to do logging is to use the basicConfig(), which reports all warnings and errors:
from logging import basicConfig basicConfig()
Qpidd also provides a convenience method that makes it easy to specify the level of logging desired. For instance, the following code enables logging at the DEBUG level:
from qpid.log import enable, DEBUG enable("qpid.messaging.io", DEBUG)
For more information on Python logging, see http://docs.python.org/lib/node425.html. For more information on Qpid logging, use $ pydoc qpid.log.