Not able to run gradle based webapp in heroku - heroku

Question

Below is what I tried.
The below is my build.gradle
/*
* This build file was generated by the Gradle 'init' task.
*
* This generated file contains a sample Java Library project to get you started.
* For more details take a look at the Java Libraries chapter in the Gradle
* user guide available at https://docs.gradle.org/3.4/userguide/java_library_plugin.html
*/
apply plugin: 'java'
apply plugin: 'war'
apply plugin: 'eclipse-wtp'
sourceCompatibility = 1.8
targetCompatibility = 1.8
version = '1.0'
repositories {
mavenLocal()
mavenCentral()
}
sourceSets {
main {
resources.srcDirs = ["src"]
java {
srcDir 'src'
}
}
}
task stage {
dependsOn build
}
stage.mustRunAfter(clean)
dependencies {
compile fileTree(dir: './webapp/WEB-INF/lib', include: ['*.jar'])
compile 'org.springframework:spring-webmvc:4.2.5.RELEASE'
compile 'org.apache.poi:poi:3.14'
compile 'org.apache.logging.log4j:log4j-slf4j-impl:2.5'
compile 'org.slf4j:slf4j-api:1.7.21'
compile 'org.apache.logging.log4j:log4j-api:2.5'
compile 'org.apache.logging.log4j:log4j-core:2.5'
compile group: 'javax.validation', name: 'validation-api', version: '1.1.0.Final'
compile group: 'org.json', name: 'json', version: '20141113'
compile group: 'mysql', name:'mysql-connector-java', version:'5.1.36'
compile group: 'org.mybatis',name:'mybatis-spring',version:'1.2.3'
compile group: 'org.mybatis',name:'mybatis',version:'3.3.0'
compile group: 'org.springframework', name:'spring-orm', version:'3.1.2.RELEASE'
compile group: 'org.springframework', name:'spring-jdbc', version:'3.1.2.RELEASE'
compile group: 'org.springframework', name:'spring-webmvc', version:'3.1.2.RELEASE'
compile group: 'commons-dbcp', name:'commons-dbcp', version:'1.2.2'
compile group: 'org.activiti', name: 'activiti-engine', version: '5.18.0'
compile group: 'javax.mail', name:'mail', version:'1.4.3'
compile group: 'commons-fileupload', name:'commons-fileupload', version:'1.3.2'
compile group: 'commons-io', name:'commons-io', version:'1.3.2'
compile group: 'org.apache.axis', name:'axis', version:'1.4'
compile group: 'commons-discovery', name: 'commons-discovery', version: '0.2'
compile group: 'commons-logging', name: 'commons-logging', version: '1.1.3'
compile group: 'javax.xml', name: 'jaxrpc-api', version: '1.1'
compile group: 'javax.xml.soap', name: 'saaj-api', version: '1.3'
compile group: 'wsdl4j', name: 'wsdl4j', version: '1.6.2'
compile group: 'org.twitter4j', name: 'twitter4j', version: '4.0.4'
compile group: 'org.twitter4j', name: 'twitter4j-stream', version: '3.0.5'
providedCompile 'javax.servlet:javax.servlet-api:3.1.0'
testCompile 'junit:junit:3.8.1'
}
Procfile
web: build/install/twitter-api9/bin/TwitterApi
When I call my apis from postman I get below errors.
Error log:
2017-04-10T19:11:21.820853+00:00 heroku[web.1]: State changed from crashed to starting
2017-04-10T19:11:26.250394+00:00 heroku[web.1]: Starting process with command `build/install/twitter-api9/bin/TwitterApi`
2017-04-10T19:11:28.283776+00:00 heroku[web.1]: Process exited with status 127
2017-04-10T19:11:28.198888+00:00 app[web.1]: Setting JAVA_TOOL_OPTIONS defaults based on dyno size. Custom settings will override them.
2017-04-10T19:11:28.199032+00:00 app[web.1]: bash: build/install/twitter-api9/bin/TwitterApi: No such file or directory
2017-04-10T19:11:28.324886+00:00 heroku[web.1]: State changed from starting to crashed
2017-04-10T19:11:50.592336+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=POST path="/main/twitter_data" host=twitter-api9.herokuapp.com request_id=69ce91fa-9677-4b51-9190-dc40bf0f1648 fwd="49.205.228.96" dyno= connect= service= status=503 bytes= protocol=http
I think there is something wrong in procfile as my build is successful but the only problem is just when I try to access my application/api. The application is a spring mvc application which runs fine with war deployed in local tomcat.
EDIT:
Changed my Procfile to below where my war resides
web: sh build/libs
Now the error is:
Though the process exits with status 0 which I guess means everything is fine. But still the app crashes:
2017-04-11T14:37:32.333327+00:00 heroku[web.1]: State changed from crashed to starting
2017-04-11T14:37:37.394992+00:00 heroku[web.1]: Starting process with command sh build/libs
2017-04-11T14:37:39.356372+00:00 app[web.1]: Setting JAVA_TOOL_OPTIONS defaults based on dyno size. Custom settings will override them.
2017-04-11T14:37:39.441553+00:00 heroku[web.1]: Process exited with status 0
2017-04-11T14:37:39.458917+00:00 heroku[web.1]: State changed from starting to crashed
2017-04-11T15:17:01.974207+00:00 heroku[run.7895]: Awaiting client
2017-04-11T15:17:02.034572+00:00 heroku[run.7895]: Starting process with command bash
2017-04-11T15:17:02.290336+00:00 heroku[run.7895]: State changed from starting to up
2017-04-11T14:38:47.445653+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=POST path="/main/twitter_data" host=twitter-api9.herokuapp.com request_id=1673e258-3fc2-4630-ac22-4869b8e68b13 fwd="49.205.228.96" dyno= connect= service= status=503 bytes= protocol=https

Answer 1

Step by step on how to address this issue:
First check where the .war file is deployed which can be done as follows:
run $ heroku run bash -a twitter-api9 from cli.
Now that terminal is open, check with ls of the directories present. I am sure build will be one of them if not just grep for .war file.
Once you know the war location change your Procfile to below (for me the war was residing in build/libs/ may be different for others):
web: java $JAVA_OPTS -DTG_ENV=prod -jar webapp-runner.jar --port $PORT build/libs/*.war
The above will redirect the requests made to these location and since this is a web application you would need a webapp-runner.jar /or jetty-runner or equivalent to run the war which is not needed if its a jar.
Now the application is running and ready to take requests. But note the above works if the build is successful and webapp-runner.jar is in root dir else mention the full path of the jar.