Up until 14 days ago I was not getting these errors, my guess is the last update broke this feature because it had been working before I last updated it.
I am working on correcting the indexing errors I have been getting on my Graylog2 installation and it appears that they are coming from my Exchange extractor which takes incoming data in the form of a .csv document and splits it up into the proper fields.
I am constantly getting this error in my logs.
MapperParsingException[failed to parse [message_info]]; nested: IllegalArgumentException[Invalid format: "04I:" is malformed at "I:"];
I am not 100% sure what I need to do to fix this, any ideas?