Running a java subprocess from a python app in Heroku

Question

I am new to Heroku. The backend logic of my flask web app is actually running a Java subprocess (subprocess.call( ...) ) to get some helper data. (I know it's a bad thing to do)
On deployment, Heroku works as expected and installs Python runtime and frameworks from requirements.txt but not JDK.

Any way I can configure Java in the same and make this work ??

codefinger · Accepted Answer · 2017-06-26 14:14:07Z

7

Run the following command:

$ heroku buildpacks:add heroku/jvm

Then redeploy with a git push heroku master. This will install the JDK into your slug.

answered Jun 26, 2017 at 14:14

codefinger

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3 Comments

Amartya Over a year ago

tried this. But on launching heroku run bash, i am still getting - java : 'command not found'.

codefinger Over a year ago

Try git commit -m "redeploy" --allow-empty and then git push heroku master

Amartya Over a year ago

This actually solved the problem. Sorry for accepting late!

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