I have multi-module gradle project and using Jib plugin for build docker image and push to registry.
But, when I build image and try to run this image I get this exception:
Error: Could not find or load main class Xmx512m
Caused by: java.lang.ClassNotFoundException: Xmx512m
Here is my root build.gradle file:
plugins {
id 'org.springframework.boot' version "$springBootVersion" apply false
id 'io.spring.dependency-management' version "$springDependencyManagerVersion" apply false
id 'com.google.cloud.tools.jib' version "$jlibVersion" apply false
}
def javaMicroservices = [
project(':akt-user-management-ms'),
project(':akt-applications-ms')
]
allprojects {
repositories {
mavenCentral()
jcenter()
}
apply plugin: 'java'
dependencies {
implementation "io.jsonwebtoken:jjwt-api:${jwt_version}"
implementation "io.jsonwebtoken:jjwt-impl:${jwt_version}"
implementation "io.jsonwebtoken:jjwt-jackson:${jwt_version}"
}
}
subprojects {
sourceCompatibility = jdk_version
targetCompatibility = jdk_version
apply plugin: 'pmd'
apply plugin: 'checkstyle'
pmd {
toolVersion = '6.10.0'
ruleSets = []
ignoreFailures = false
rulePriority = 3
ruleSetFiles = files("${rootProject.projectDir}/qa/pmd.xml")
}
checkstyle {
toolVersion = '8.15'
configFile = file("${rootProject.projectDir}/qa/checkstyle.xml")
ignoreFailures = false
}
tasks.withType(Test) {
maxParallelForks = Runtime.runtime.availableProcessors().intdiv(2) ?: 1
}
}
configure(javaMicroservices) {
apply plugin: 'com.google.cloud.tools.jib'
jib {
to {
image = "$dockerRepoUrl/${project.name}"
}
container {
jvmFlags = ['Xmx512m']
creationTime = 'USE_CURRENT_TIMESTAMP'
}
}
}
Root settings.gradle
rootProject.name = 'xxxx'
include 'akt-user-management-ms' //8080
include 'akt-applications-ms' //8081
include 'middleware' //8082
build.gradle file for one of this project. (All of them are same except dependecy):
plugins {
id 'org.springframework.boot'
id 'io.spring.dependency-management'
id 'java'
id 'com.google.cloud.tools.jib'
}
group = 'az.ingress.user.management'
version = '0.0.1-SNAPSHOT'
configurations {
compileOnly {
extendsFrom annotationProcessor
}
}
repositories {
mavenCentral()
}
dependencies {
implementation project(":common")
implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
implementation 'org.springframework.boot:spring-boot-starter-security'
implementation 'org.springframework.boot:spring-boot-starter-validation'
implementation 'org.springframework.boot:spring-boot-starter-web'
implementation "io.springfox:springfox-swagger2:$swaggerVersion"
implementation "io.springfox:springfox-swagger-ui:$swaggerVersion"
implementation 'org.liquibase:liquibase-core'
compileOnly 'org.projectlombok:lombok'
annotationProcessor 'org.projectlombok:lombok'
runtimeOnly 'mysql:mysql-connector-java'
testImplementation 'org.springframework.security:spring-security-test'
testImplementation('org.springframework.boot:spring-boot-starter-test') {
exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
}
}
test {
useJUnitPlatform()
}
Could not find any solution. Tried many things but keep getting this exception over and over again.
Note: using jib version: 2.6.0
Command-line options are usually prefixed with -
or --
. It should be -Xmx512m
in this case. Without -
, java
will think Xmx512m
is a Java main class name.
$ java -Xmx512m com.example.HelloWorldMain
hello world
$ java foo
Error: Could not find or load main class foo
Caused by: java.lang.ClassNotFoundException: foo
$ java Xmx512m
Error: Could not find or load main class Xmx512m
Caused by: java.lang.ClassNotFoundException: Xmx512m