deploying java web app to heroku: "Could not find or load main class"

Asked Mar 10 '20 at 21:39

Active Mar 10 '20 at 21:39

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I followed this instruction:

to deploy a java web app to heroku.

The content of my Procfile is the following:

web: java $JAVA_OPTS -cp target/classes:target/dependency/* Optimizer

(Optimizer is the name of my main class.)

Executing the command

mvn clean install

builds the project successfully.

But then executing the command

heroku local web

results in the following error message:

web.1 |  Error: Could not find or load main class Optimizer

Does anybody have any idea what I need to do differently?

asked Mar 10 '20 at 21:39

steady_progress

1

Hard to say with the limited information. Does `Optimizer` really live outside of any package? – Malax Mar 11 '20 at 08:35
No it doesn’t.... it’s in package com.michael.optimizer .... given this fact, what should the procfile look like? – steady_progress Mar 11 '20 at 11:20
1

`web: java $JAVA_OPTS -cp target/classes:target/dependency/* com.michael.optimizer.Optimizer` Should work in that case. Let me know if that fixes your issue! :) – Malax Mar 12 '20 at 09:01
yes, thank you. the error message is gone. – steady_progress Mar 28 '20 at 16:28

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