Tracking logs: Treat null context same as missing context #25006
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Should resolve the AttributeError on the line
library_name = segment_context.get('library', ...
that occurs when full_segment_event['context'] == None.
This error is currently the #1 in LMS and is obscuring other
errors.
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kdmccormick
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Sep 17, 2020
| # Start with the context provided by Segment in the "client" field if it exists | ||
| # We should tightly control which fields actually get included in the event emitted. | ||
| segment_context = full_segment_event.get('context', {}) | ||
| segment_context = full_segment_event.get('context') or {} |
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The original line uses the DICT.get('KEY', {}) pattern to look up a value in a dictionary, falling back to an empty dictionary if the key is missing. The issue with this approach is that if KEY is present in DICT, but has a value of None, then the result will be None instead of {}.
My proposed change is to use DICT.get('KEY') or {}, which will return {} whether KEY is missing or present with a None value.
There are several other places in this function (such as line 126 above) that use the old pattern. Should I change those too?
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Your PR has finished running tests. There were no failures. |
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This error does not seem to be occurring any more; closing. |
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Should resolve the AttributeError on the line:
that occurs when
full_segment_event['context'] == None.This error is currently the #1 in LMS and is obscuring other errors.
I think this was the cause of the alert this morning; my NewRelic-fu isn't developed enough to be sure though.
I don't know whether this is the right fix. Maybe it's good to have that AttributeError yelling at us until we can find out why we are getting segment events with
Noneas their context. I'm posting in hope of soliciting feedback.What do you think @stvstnfrd ?Update: This can't be the cause of the alert this morning, because it's owned by
platform-data-de, and we still see the error spike even when filtering that DE's endpoints out of the query.