July 2017
Intermediate to advanced
656 pages
16h 1m
English
book
Node Cookbook - Third Edition
by Matteo Collina, David Mark Clements, Peter Elger, Mathias Buus Madsen
Content preview from Node Cookbook - Third Edition
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How it works...
The NODE_DEBUG environment variable can be set to any combination of the following flags:
- http
- net
- tls
- stream
- module
- timer
- cluster
- child_process
- fs
The fs debug flagThe quality of output varies for each flag. At the time of writing, the fs flag in particular doesn't actually supply any debug log output, but when enabled will cause a useful stack trace to be added to any unhandled error events for asynchronous I/O calls. See https://github.com/nodejs/node/blob/cccc6d8545c0ebd83f934b9734f5605aaeb000f2/lib/fs.js#L76-L94 for context.
In our recipe, we were able to enable core timer and HTTP debug logs, by setting the NODE_DEBUG environment variable to timers in the first instance and then timers,http in the second.
We used a ...