Error while trying to deploy Play Framework 2.1.1 app to Heroku
I got java app play framework 2.1.1, it works fine on localhost.
I want to deploy it to Heroku, so I followed these instructions
Everything is going well until I enter this line:
$ git push heroku master
When I enter this line into CMD, I get the following error at the end:
remote: [info] Compiling 1 Scala source to /tmp/scala_buildpack_build_dir
/.sbt_home/plugins/target/scala-2.9.2/sbt-0.12/classes...
remote: [error] error while loading CharSequence, class file '/tmp/scala_
buildpack_build_dir/.jdk/jre/lib/rt.jar(java/lang/CharSequence.class)' is broken
remote: [error] (bad constant pool tag 18 at byte 10)
remote: [error] error while loading Comparator, class file '/tmp/scala_bu
ildpack_build_dir/.jdk/jre/lib/rt.jar(java/util/Comparator.class)' is broken
remote: [error] (bad constant pool tag 18 at byte 20)
remote: [error] two errors found
remote: [error] (compile:compile) Compilation failed
remote: Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore?
remote: ! ERROR: Failed to run sbt!
remote: We're sorry this build is failing! If you can't find the issue in
application
remote: code, please submit a ticket so we can help: https://help.heroku.
com
remote: You can also try reverting to the previous version of the buildpa
ck by running:
remote: $ heroku buildpacks:set https://github.com/heroku/heroku- buildpac
k-scala#previous-version
remote:
remote: Thanks,
remote: Heroku
remote:
remote:
remote: ! Push rejected, failed to compile Play 2.x - Java app
remote:
remote: Verifying deploy....
remote:
remote: ! Push rejected to project.
remote:
To https://git.heroku.com/project.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/project.git'
I really don't know what to do, can anyone help me?
thank
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1 answer
It looks like you are trying to deploy an application that uses Scala 2.9, which does not support Java 8. But Java 8 is the default on Heroku.
Try adding the system.properties file to the root directory of your application and put the following code in it:
java.runtime.version=1.7
Then add the file to your Git repository and redeploy as follows:
$ git add system.properties
$ git commit -m "Set JDK version to 7"
$ git push heroku master
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