Cannot load keystore when running java -jar *.jar spring boot application

Hi,

I have a kafka-keytore.jks file in src/main/resources and when I run the application with mvn spring-boot:run there are no exceptions but when I run the application with java -jar target/demo-0.0.1-SNAPSHOT.jar the following error occurs:

Caused by: java.io.FileNotFoundException: class path resource [kafka-keytore.jks] cannot be resolved to absolute file path because it does not reside in the file system: jar:file:/Users/aalmazan/demo/target/demo-0.0.1-SNAPSHOT.jar!/BOOT-INF/classes!/kafka-keytore.jks at org.springframework.util.ResourceUtils.getFile(ResourceUtils.java:217) ~[spring-core-5.0.7.RELEASE.jar!/:5.0.7.RELEASE] at org.springframework.core.io.AbstractFileResolvingResource.getFile(AbstractFileResolvingResource.java:133) ~[spring-core-5.0.7.RELEASE.jar!/:5.0.7.RELEASE] at org.springframework.boot.autoconfigure.kafka.KafkaProperties$Ssl.resourceToPath(KafkaProperties.java:945) ~[spring-boot-autoconfigure-2.0.3.RELEASE.jar!/:2.0.3.RELEASE] … 76 common frames omitted

If I unpack target/demo-0.0.1-SNAPSHOT.jar the kafka-keytore.jks.jks file is inside.

Here are the steps to reproduce the problem:

Go to and generate new project skeleton with spring boot 2.0.3, demo artifact name and add Kafka dependency.
Add the following properties to src/main/resources/application.properties file:

spring.kafka.ssl.key-password=testkey
spring.kafka.ssl.keystore-location=classpath:kafka-keytore.jks
spring.kafka.ssl.keystore-password=teststore

Execute mvn clean install
Execute mvn spring-boot:run -> no error occurs
Execute java -jar target/demo-0.0.1-SNAPSHOT.jar -> the error occurs

Issue Analytics

State:
Created 5 years ago
Comments:7 (4 by maintainers)

Top GitHub Comments

12reactions

garyrussellcommented, Jun 18, 2018

One possible workaround is to extract the keystore to a temporary file:

@SpringBootApplication
public class Kgh710Application {

	public static void main(String[] args) throws Exception {
		FileCopyUtils.copy(new ClassPathResource("client.ks").getInputStream(),
				new FileOutputStream("/tmp/client.ks"));

		SpringApplication.run(Kgh710Application.class, args);
	}

}

and

spring.kafka.ssl.keystore-location=file:/tmp/client.ks

1reaction

garyrussellcommented, Feb 20, 2020

Yes, that should work ok for you. I don’t think there is any other choice, given the limitations of the Kafka clients.

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