NodeJs app with Java on Heroku

Question

I have build my first NodeJS app with Express and am running it on C9 without any issues.

The app uses a Node Package (easy-pdf-merge) which requires at least Java 6.

On pushing my code up to Heroku I get an error at the point of the merge process saying I don't have Java install on this Dyno.

I have read a little about buildpacks but I'm not sure on the direction here.

Unless there is a simpler way to merge PDFs of course.

Thanks

Stu

codefinger · Accepted Answer · 2018-07-20 21:23:57Z

11

Run the following command:

$ heroku buildpacks:clear
$ heroku buildpacks:add heroku/jvm
$ heroku buildpacks:add heroku/nodejs

Then redeploy by running

$ git commit -m "redeploy" --allow-empty
$ git push heroku master

After the build, the JVM will be installed in your app, and available for use.

edited Jul 20, 2018 at 21:23

answered Jul 20, 2018 at 20:40

codefinger

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3 Comments

StuP Over a year ago

Thanks. The build succeeded but am now getting an error in the bowser, Standard Heroku "Application Error". This is the build result. Wondering if I need to make any other settings clarifications prior to build. ------> devcenter.heroku.com/articles/… -----> Build succeeded! -----> JVM Common app detected -----> Installing JDK 1.8... done -----> Discovering process types Procfile declares types -> (none) -----> Compressing... Done: 100.8M -----> Launching... Released v26

codefinger Over a year ago

oh, you probably need the jvm buildpack to be the first buildpack. I'll edit my answer

StuP Over a year ago

Thanks very much, a little more testing to do but looks to have worked a treat. Thanks for the quick feedback too.

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