[BUG] Eventgen does not work on Windows 10 64 bit

[DieterSchmitz]

We're using Splunk 8.1.2 and SA-Eventgen version 7.2.1 and want to replay CSV files. Everything is installed on a Windows 10 64-bit machine.
When restarting Splunk with our eventgen app, the following error is shown in eventgen-error.log

2021-02-08 15:36:28 eventgen ERROR MainProcess Python int too large to convert to C long
Traceback (most recent call last):
File "C:\Program Files\Splunk\etc\apps\SA-Eventgen\lib\splunk_eventgen\eventgen_core.py", line 325, in _worker_do_work
item.run()
File "C:\Program Files\Splunk\etc\apps\SA-Eventgen\lib\splunk_eventgen\lib\eventgentimer.py", line 117, in run
self.real_run()
File "C:\Program Files\Splunk\etc\apps\SA-Eventgen\lib\splunk_eventgen\lib\eventgentimer.py", line 131, in real_run
raw_event_size = self.predict_event_size()
File "C:\Program Files\Splunk\etc\apps\SA-Eventgen\lib\splunk_eventgen\lib\eventgentimer.py", line 90, in predict_event_size
self.sample.loadSample()
File "C:\Program Files\Splunk\etc\apps\SA-Eventgen\lib\splunk_eventgen\lib\eventgensamples.py", line 464, in loadSample
csv.field_size_limit(sys.maxsize)
OverflowError: Python int too large to convert to C long

The responsible line is found in eventgensamples.py in line 464:
csv.field_size_limit(sys.maxsize)

After changing the line above to (just an example)

                csv.field_size_limit(100000000)

eventgen starts sending events to Splunk.

It seems to be, that this error occurs on Windows (64 bit???) systems only. We tested it on a Linux machine and it worked as expected.