You are on the right track. I see these errors in log. I am thinking its related to that. I don't see a checkpoint for that incident table created. I see for other ServiceNow tables though.
2/16/17
8:23:01.310 PM
2017-02-16 20:23:01,310 ERROR pid=18563 tid=Thread-17 file=thread_pool.py:_run:259 | Traceback (most recent call last):
File "/app/splunk/etc/apps/Splunk_TA_snow/bin/framework/thread_pool.py", line 257, in _run
func()
File "/app/splunk/etc/apps/Splunk_TA_snow/bin/snow_job_factory.py", line 38, in __call__
sc.DEFAULT_RECORD_LIMIT))
File "/app/splunk/etc/apps/Splunk_TA_snow/bin/snow_data_loader.py", line 142, in collect_data
self._write_checkpoint(table, timefield, jobjs, refreshed)
File "/app/splunk/etc/apps/Splunk_TA_snow/bin/snow_data_loader.py", line 278, in _write_checkpoint
if obj[timefield] == latest_timestamp]
KeyError: u'sys_updated_on'
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