Hi there,

I'm new to Heroku. Been trying to setup this tutorial and I keep getting this error when trying to start this up locally on OSX.

heroku local:start
[OKAY] Loaded ENV .env File as KEY=VALUE Format
6:16:24 PM web.1 |  Exception in thread "main" 
6:16:24 PM web.1 |  java.lang.reflect.InvocationTargetException
6:16:24 PM web.1 |  	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
6:16:24 PM web.1 |  	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
6:16:24 PM web.1 |  	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
6:16:24 PM web.1 |  	at java.lang.reflect.Method.invoke(Method.java:498)
6:16:24 PM web.1 |  	at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
6:16:24 PM web.1 |  	at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
6:16:24 PM web.1 |  	at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
6:16:24 PM web.1 |  	at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)
6:16:24 PM web.1 |  Caused by: java.lang.IllegalAccessError: tried to access method org.springframework.core.io.support.SpringFactoriesLoader.loadFactoryNames(Ljava/lang/Class;Ljava/lang/ClassLoader;)Ljava/util/List; from class org.springframework.boot.SpringApplication
6:16:24 PM web.1 |  	at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:426)
6:16:24 PM web.1 |  	at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:418)
6:16:24 PM web.1 |  	at org.springframework.boot.SpringApplication.<init>(SpringApplication.java:266)
6:16:24 PM web.1 |  	at org.springframework.boot.SpringApplication.<init>(SpringApplication.java:247)
6:16:24 PM web.1 |  	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255)
6:16:24 PM web.1 |  	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243)
6:16:24 PM web.1 |  	at com.example.Main.main(Main.java:48)
6:16:24 PM web.1 |  	... 8 more
[DONE] Killing all processes with signal  SIGINT
6:16:24 PM web.1 Exited with exit code null

Any ideas on how to solve this problem? Works fine when submitted to Heroku.

Hi, I'm following https://devcenter.heroku.com/articles/getting-started-with-java#run-the-app-locally
and at 'heroku local web' I have this error.

admin@DESKTOP-O8G746S /C/Bohdan/dev/java-getting-started (master)
$ heroku local web
forego | starting web.1 on port 5000
web.1 | Error: Could not find or load main class Main

Does this error related to project structure?

From what I understand from the Heroku documentation, I should be able to access the database locally with no configuration updates to this project as long as I export the datasource (explained here: https://devcenter.heroku.com/articles/heroku-postgresql#local-setup), which I did.

However, I'm getting this error when trying to access localhost:5000/db.html in this project:

dataSource or dataSourceClassName or jdbcUrl is required

Is there additional configuration required to get this to work locally? It works fine once it's deployed to Heroku remotely.

Problem:
Hobby-dev plan for postgres has connection limit of 20. Since showDatabase() in Main.java never closes the connection, the app reaches its connection cap in 20 refreshes. So, we get "FATAL: too many connections for role..." error after 20 refreshes.

Solution:
Close the connection after displaying the info from the database. Add connection.close() after writing the database content on the screen (i.e. after line 42).

The compiler plugin in the pom.xml looks redundant. If so can you remove it?

without ORM , datasource model and connecting to db by codding in java is not good and fast model.
without ORM application is not great
why orm is not working but it is working on my localhost

When setting up the sample app, this link http::localhost:5000/db returns the following error:
com.zaxxer.hikari.HikariConfig : HikariPool-1 - dataSource or dataSourceClassName or jdbcUrl is required.

I started a fresh app on Heroku, didn't change anything. The dropdown doesn't function.

The Procfile did not work on my Windows environment. I modified the following:

• removed the $JAVA_OPTS variable
• replaced the colon : in the classpath with a semi-colon ;

web:    java -cp target/classes;target/dependency/* Main

This modification solved the problem on Windows but the application does not run on heroku.

Hi,

I deployed a java web app on heroku, but I cant access through the link that heroku provides. Logs said that the mvn build was success. When open the app using the cmd command and from the dashboard, it says that

Application error

An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details.

My logs are clean as I know. Followings are my logs.

2018-04-29T16:03:39.435610+00:00 app[api]: Release v1 created by user [email protected]
2018-04-29T16:03:39.435610+00:00 app[api]: Initial release by user [email protected]
2018-04-29T16:03:40.427660+00:00 app[api]: Enable Logplex by user [email protected]
2018-04-29T16:03:40.427660+00:00 app[api]: Release v2 created by user [email protected]
2018-04-29T16:04:02.000000+00:00 app[api]: Build started by user [email protected]
2018-04-29T16:09:19.839596+00:00 app[api]: Deploy bfdb621d by user [email protected]
2018-04-29T16:09:19.839596+00:00 app[api]: Release v3 created by user [email protected]
2018-04-29T16:04:02.000000+00:00 app[api]: Build succeeded
2018-04-29T16:09:52.585394+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/" host=infinite-spire-46506.herokuapp.com request_id=313ff6e1-d1ab-4265-b540-39d10139894f fwd="112.134.44.149" dyno= connect= service= status=503 bytes= protocol=https
2018-04-29T16:09:53.914776+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/favicon.ico" host=infinite-spire-46506.herokuapp.com request_id=69ae9b29-cdcb-4d53-b315-2853a44adfa3 fwd="112.134.44.149" dyno= connect= service= status=503 bytes= protocol=https
2018-04-29T16:15:42.953185+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/" host=infinite-spire-46506.herokuapp.com request_id=0836432d-ba3d-420e-8dfd-e5397b61505f fwd="112.134.44.149" dyno= connect= service= status=503 bytes= protocol=https
2018-04-29T16:15:43.888978+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/favicon.ico" host=infinite-spire-46506.herokuapp.com request_id=0308334e-1a4f-46dc-be68-4821bdbc8492 fwd="112.134.44.149" dyno= connect= service= status=503 bytes= protocol=https
2018-04-29T16:16:20.824260+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/" host=infinite-spire-46506.herokuapp.com request_id=7e68acf5-9498-4d11-ac4e-d6338fc1bc24 fwd="112.134.44.149" dyno= connect= service= status=503 bytes= protocol=https
2018-04-29T16:16:22.301258+00:00 heroku[router]: at=error code=H14 desc="No web processes running" method=GET path="/favicon.ico" host=infinite-spire-46506.herokuapp.com request_id=e738e823-5867-4d61-96a7-7ccc619964e4 fwd="112.134.44.149" dyno= connect= service= status=503 bytes= protocol=https

If anyone got a solution for this issue, please add it to this thread.

Thank you.