Endless compilation loop with serverless-offline

[deanc]

Describe the bug
When creating a syntax error when combined with serverless-offline with --reloadHandler flag we are experiencing incredibly high CPU and memory usage. Screenshot attached. The error log you see at the bottom of the issue happens several times a second in a loop.

• OS: MacOS (Latest)
• Plugins

"serverless": "^3.30.1",
"serverless-esbuild": "^1.44.0",
"serverless-offline": "^12.0.4",

Plugin configuration:

  esbuild:
    bundle: true
    minify: true
    sourcemap: true
    packager: 'yarn'
    exclude: ['aws-sdk']
    external: ['oracledb', 'tedious', 'pg', 'mysql', 'better-sqlite3', 'sqlite3', 'pg-query-stream']

[deanc]

Alright I think I know what is going on here. Sorry for the quick turnaround. I am guessing that somewhere in our file system some JS files are being compiled and because the default settings for watch.patterns is ./**/*.(js|ts) it is picking up the compiled JS files somewhere. After changing this to ./**/*.ts (we are entirely TS codebase) the issue stopped.

Maybe it's worth adding a note to the docs