How to write log messages from arcpy to ArcGis server?

Question

Published geoprocessing services write logs that are available at ArcGis Server Manager (arcgis-server/arcgis/manager/log.html)

Arcpy has AddMessage, AddError, etc methods for logging, but they are doesn't works when script is published as geoprocessing service. As I understand, they works only locally in ArcMap.

Is there some way to write server logs from arcpy?

Answer 1

If you use the arcpy.AddMessage(message), it should show up in your published GP, but it shows up on the job messages page (not the server logs as you indicated in your question). You also need to enable this in the service properties (or when you publish the service):

Answer 2

The AddMessage will add a message to the geoprocessing job message queue:

jobs/ja861064b634648f1be2371e2307c6112?f=json

For general logging, I use python logging:
import logging and make sure the formatter has a process id:
formatter = logging.Formatter('%(asctime)s p%(process)s {%(pathname)s:%(lineno)d} %(levelname)s |-| %(message)s')

# Set up logging

logfilepath = os.path.join(tempfile.gettempdir(),'example.log')

logger = logging.getLogger('example_logger')
logger.setLevel(logging.DEBUG)

logger.handlers = []

formatter = logging.Formatter('%(asctime)s p%(process)s {%(pathname)s:%(lineno)d} %(levelname)s |-| %(message)s')
fh = logging.FileHandler(logfilepath)
fh.setFormatter(formatter)
logger.addHandler(fh)

ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
ch.setFormatter(formatter)
logger.addHandler(ch)

logger.info('example script start...')

fh.flush()

logger.debug('Importing ArcPy...')
import arcpy
logger.debug('Importing ArcPy Import Complete')