TextIOWrapper regression bug in 1.6.12: 'file' object has no attribute 'readable'

I think I stumbled onto a bug in 1.6.12 that impacts at least 7.1.4 and 7.3.0. It seems to be related to python 2 vs 3 and athe TextIOWrapper around the output stream. The initial registration seems to be fine (--scheme), but whenever the script is run to collect data that’s when it fails.

When I downgrade splunk-sdk version to 1.6.11 my modular input (TA) works fine again.

Here’s the traceback from the 1.6.12 version from a local 7.3 instance running on a Mac:

Traceback (most recent call last):
  File "/Users/lalleman/splunk73/splunk/etc/apps/TA-oam_dms/bin/OAM_DMS.py", line 422, in <module>
    sys.exit(OamDmsModularInput().run(sys.argv))
  File "/Users/lalleman/splunk73/splunk/etc/apps/TA-oam_dms/bin/../lib/splunklib/modularinput/script.py", line 56, in run
    return self.run_script(args, EventWriter(), sys.stdin)
  File "/Users/lalleman/splunk73/splunk/etc/apps/TA-oam_dms/bin/../lib/splunklib/modularinput/event_writer.py", line 49, in __init__
    self._out = TextIOWrapper(output)
AttributeError: 'file' object has no attribute 'readable'

[fantavlik]

Very sorry for your frustration @Bakermat, we should have publicized that issue more broadly once we verified it. I have taken your suggestion and added it to the known issues for the release here: https://github.com/splunk/splunk-sdk-python/releases/tag/1.6.12

[fantavlik]

We have released a fix in v1.6.13 https://github.com/splunk/splunk-sdk-python/releases/tag/1.6.13 but please let us know if you continue to see similar issues.