Java Heroku application run locally with foreman

Question

I'm following the "Getting Started with Java on Heroku" guide at https://devcenter.heroku.com/articles/getting-started-with-java I follow the steps till I deploy and execute succesfully the application downloaded from GitHub. When I try to execute it locally on Windows XP with the command

foreman start web

I get the error:

    web.1  | started with pid 3388
    web.1  | Error: Could not find or load main class Main
    web.1  | exited with code 1
    system | sending SIGKILL to all processes

My Procfile is:

web:    java %JAVA_OPTS% -cp target\classes:target\dependency\* Main

And

>echo %JAVA_OPTS%
-Xms256m -Xmx512m

Can anyone suggest me how to solve?

it is only the Main file, it is a "from scratch" project downloaded from GitHub — grandeale83
– grandeale83, Commented Sep 30, 2014 at 12:13

user2818782 · Accepted Answer · 2014-09-30 14:26:46Z

7

Quotes and semicolon

web: java %JAVA_OPTS% -cp target\classes;"target\dependency\*"  Main

edited Sep 30, 2014 at 14:26

answered Sep 30, 2014 at 14:20

user2818782

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4 Comments

user2818782 Over a year ago

are you editing your Procfile to look like the above? If you have a separate file for Windows, like I have, you need to specify it when starting foreman. 'foreman start web --procfile=Procfile.win'

Ali Essam Over a year ago

web: java -Xms256m -Xmx512m -cp target\classes:"target\dependency\*" Main this is my Procfile.win and I run it with foreman start web --procfile=Procfile.win and I get the same error in the original question.

user2818782 Over a year ago

try changing the colon to a semi colon

codefinger Over a year ago

Note that if %JAVA_HOME% is not set, this can fail (because it thinks "%JAVA_HOME%" is the class name.

DJ Martin · Accepted Answer · 2015-03-20 20:20:45Z

3

I ran into this issue while running through the https://devcenter.heroku.com/articles/getting-started-with-java tutorial.

After tinkering with some of these answers I discovered that step six at https://devcenter.heroku.com/articles/getting-started-with-java#define-a-procfile tells the answer.

When you see instructions to run your app with foreman, append an extra -f Procfile.windows flag to ensure your Windows-specific Procfile is picked up. For example: foreman start web -f Procfile.windows

Once I switched to the foreman start web -f Procfile.windows command, everything worked smoothly.

answered Mar 20, 2015 at 20:20

DJ Martin

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Comments

Andy Askey · Accepted Answer · 2014-12-13 19:54:13Z

1

Same problem with java-getting-stared app downloaded from heroku server. Changing to ";" works on Windows. Still need ":" on heroku linux server.

edited Dec 13, 2014 at 19:54

answered Dec 13, 2014 at 19:39

Andy Askey

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