Let's say I have log group /aws/lambda/backend
, which tracks logs of my Python lambda function. I want to debug common issues, like exceptions and time outs, and find related log entries.
But the function has a lot of concurrent traffic, so there are many log streams in the log group. How do I find the log entries across all logs without visiting each individual log stream and perform the search?
This is possible by using Logs Insights , which uses a query language to analyze logs in a log group.
For common Python function errors, I find this query useful:
fields @timestamp, @message, @logStream
| filter @message like /(?i)Exception|Error|Traceback|Timed out/
| sort @timestamp desc
| limit 20
This will return log queries and links to log groups to places, where exceptions or timeouts happened.
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