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Editorial Team
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Asked: 2026-06-14T13:49:38+00:00

I’ve been having a heck of a time getting my Play! framework java app

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I’ve been having a heck of a time getting my Play! framework java app to run on Heroku, and I think I’ve narrowed it down to the Postgres JDBC driver not liking Heroku’s DATABASE_URL parameter because it starts with postgres: and not postgresql:.

What is the proper way to configure a play! 2.0 app to connect to a heroku-provided Postgres instance?

I’ve tried variations on the following:
PLAY_OPTS=”-Ddb.default.url=$DATABASE_URL -Ddb.default.driver=org.postgresql.Driver”

But upon startup I get a SQLException that no suitable driver can be found for $DATABASE_URL.

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1 Answer

  1. Editorial Team

    No need to pass them in as system properties you can pickup Heroku environment variables in your application.conf file

    ...
db.default.driver=org.postgresql.Driver
db.default.url=${DATABASE_URL}

    Then define this in your Procfile

    web: target/start -Dhttp.port=${PORT} ${JAVA_OPTS} -Dconfig.resource=application.conf

    It should pick up the DATABASE_URL property for the Heroku environment. Although, I recommend creating a configuration file that is specific for the Heroku environment (i.e. heroku-prod.conf), but this is just an example.

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