Make Sense of Errors and Logging


Errors and log files are two of the most important tools a developer have to try and use to find the source of a problem. If you're like most developers, your approach to capturing and utilizing errors and logs is fairly straightforward. You probably send log output to a file or a log aggregation product. You may notify on the occurrence of errors, either sending emails directly from your code, or via an error monitoring product.

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What's lacking from these approaches is something a bit more holistic, comprehensive, and contextual. The trouble comes in two forms:

  • There's often way more noise than signal if you're solely relying on logs to track, isolate, and make sense out of your errors, especially if an error is being thrown over and over again, or if you're dealing with log files across numerous servers

  • If you're focused primarily on errors, either emailing on error occurrences or using an error monitoring program, that approach removes the relevant logs from the picture altogether, leaving you without the context you need to determine root cause.

I'll cover 3 ways you can make sense of your errors and logs together:

  1. Aggregation - If you're developing an application that runs on a single server, finding all of your logs isn't an issue for you. But it's far more likely that you have applications hosted on multiple servers for purposes of availability, scalability and redundancy, making it more difficult to easily (and centrally) access errors and logging data. Tools exist to aggregate logs in various standard formats (assuming you have access ), which is a good step in the right direction, given the potential for numerous separate logging files, as well as log file rotation and retention issues. The right answer is to implement a solution that aggregates logs and errors with development in mind. That way, you can be sure you are collecting every piece of information necessary and have it presented in a way that's geared toward developers.

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