OK, please disregard this.
My problem is that I had some other handler with the format string set as
{message} instead of {record.message}.
I'm surprised that {message} worked before.
On Thu, Oct 24, 2013 at 1:46 PM, Gustavo Carneiro <[email protected]>wrote:
> Hello,
>
> I am trying to build my own logbook handler that sends logs to a logstash
> server. My code is along these lines (g_logstash_pusher class omitted for
> brevity):
>
>
> class LogstashHandler(logbook.Handler,
> logbook.StringFormatterHandlerMixin):
> formatter_class = PasswordHidingFormatter
>
> def __init__(self, level=logbook.NOTSET, format_string=None,
> encoding=None, filter=None, bubble=True):
> logbook.Handler.__init__(self, level, filter, bubble)
> logbook.StringFormatterHandlerMixin.__init__(self, format_string)
>
> def emit(self, record):
> d = dict(LOGSTASH_EXTRA_FIELDS)
> d.update(record.extra)
> for attr in ['message', 'func_name', 'module', 'filename', 'lineno',
> 'thread', 'thread_name',
> 'formatted_exception', 'exception_name']:
> value = getattr(record, attr)
> if value:
> d[attr] = value
> print ">>>>>>>>>>>>>>>>", repr(record.message)
> d['levelname'] = getattr(record, 'level_name')
> msg = json.dumps(d)
> print msg
> if g_logstash_pusher is not None:
> g_logstash_pusher.queue_message(msg)
>
> [...]
>
> FORMAT_STRING = '{record.time:%Y-%m-%d %H:%M:%S.%f} {record.channel}
> {record.level_name:5s} {record.message}'
>
> logstash_handler = LogstashHandler(
> level=getattr(logbook, level),
> format_string=FORMAT_STRING)
>
> logstash_handler.push_application()
>
>
> This is working fine for most message, but some other messages this
> outputs something like:
>
> Traceback (most recent call last):
> File
> "/usr/local/lib/python2.7/dist-packages/Logbook-0.6.1_dev_20131024-py2.7.egg/logbook/handlers.py",
> line 214, in handle
> self.emit(record)
> File
> "/usr/local/lib/python2.7/dist-packages/Logbook-0.6.1_dev_20131024-py2.7.egg/logbook/handlers.py",
> line 849, in emit
> self.write(self.format_and_encode(record))
> File
> "/usr/local/lib/python2.7/dist-packages/Logbook-0.6.1_dev_20131024-py2.7.egg/logbook/handlers.py",
> line 617, in format_and_encode
> return StreamHandler.format_and_encode(self, record)
> File
> "/usr/local/lib/python2.7/dist-packages/Logbook-0.6.1_dev_20131024-py2.7.egg/logbook/handlers.py",
> line 549, in format_and_encode
> rv = self.format(record) + '\n'
> File
> "/usr/local/lib/python2.7/dist-packages/Logbook-0.6.1_dev_20131024-py2.7.egg/logbook/handlers.py",
> line 193, in format
> return self.formatter(record, self)
> File
> "/usr/local/lib/python2.7/dist-packages/Logbook-0.6.1_dev_20131024-py2.7.egg/logbook/handlers.py",
> line 374, in __call__
> line = self.format_record(record, handler)
> File
> "/usr/local/lib/python2.7/dist-packages/Logbook-0.6.1_dev_20131024-py2.7.egg/logbook/handlers.py",
> line 358, in format_record
> return self._formatter.format(record=record, handler=handler)
> KeyError: 'message'
>
>
> Any idea why the 'message' attribute seems to disappear from the log
> record once in a while? If I remove my handler, logging is fine. In fact,
> in my handler everything is fine, but the next handler in the stack cannot
> read record.message for some reason. Do you think the LogRecord object is
> being mutated in some way to make record.message inaccessible?
>
> Thanks in advance.
>
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>
--
Gustavo J. A. M. Carneiro
Gambit Research LLC
"The universe is always one step beyond logic." -- Frank Herbert
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