Error during page navigation

[nealalpert]

Our error log is registering the following error seemingly randomly during page navigation:

Error: Invalid Build File Hash(18adc7a43c926cbfd1fb) for chunk: commons.js
at Server.handleBuildHash (/var/app/current/node_modules/next/dist/server/index.js:930:15)
at Server._callee5$ (/var/app/current/node_modules/next/dist/server/index.js:275:28)
at tryCatch (/var/app/current/node_modules/regenerator-runtime/runtime.js:64:40)
at GeneratorFunctionPrototype.invoke [as _invoke] (/var/app/current/node_modules/regenerator-runtime/runtime.js:299:22)
at GeneratorFunctionPrototype.prototype.(anonymous function) [as next] (/var/app/current/node_modules/regenerator-runtime/runtime.js:116:21)
at step (/var/app/current/node_modules/babel-runtime/helpers/asyncToGenerator.js:17:30)
at /var/app/current/node_modules/babel-runtime/helpers/asyncToGenerator.js:35:14
at Promise.F (/var/app/current/node_modules/core-js/library/modules/_export.js:35:28)
at Object. (/var/app/current/node_modules/babel-runtime/helpers/asyncToGenerator.js:14:12)
at Object._nextHashCommonsJs [as fn] (/var/app/current/node_modules/next/dist/server/index.js:289:26)

Seems to be originating from the following code:
https://github.com/zeit/next.js/search?utf8=%E2%9C%93&q=Invalid+Build+File+Hash

[khrome83]

This was produced with version "next": "^2.0.0-beta.32",

Do we know what the server.js code is doing that it is generating this error?

We can not reproduce this locally.

[arunoda]

@nealalpert this is happening because there are two version of your Next.js is deployed and routed via the same domian name.

If you are doing so, make sure to use sticky sessions.

[khrome83]

@arunoda thank you that makes perfect sense!

[arunoda]

For the future reference, I've updated the wiki with more info: https://github.com/zeit/next.js/wiki/Deployment

[alanshutko]

So, by design, the application will break if it is updated while users are online?

[arunoda]

@alanshutko no it's not.
See: https://github.com/zeit/next.js/wiki/Deployment#why