SpringBoot ConfigurationProperties entry is prefixed with content which is not given via command line configuration

Currently I have a project (excerpt from a larger project) with the following class:

@Component
@ConfigurationProperties("xyz")
public class ConfigurationLeiDaD {

  private static final Logger LOG = LoggerFactory.getLogger(ConfigurationLeiDaD.class);

  private static final String DEFAULT_INBOUND = "inbound";

  private Path baseDirectory;
  private Path inbound;

  ConfigurationLeiDaD() {
    this.baseDirectory = null;
    this.inbound = null;
  }

  public Path getBaseDirectory() {
    return baseDirectory;
  }

  void setBaseDirectory(Path baseDirectory) {
    this.baseDirectory = baseDirectory;
  }

  public Path getInbound() {
    return Objects.requireNonNullElseGet(this.inbound, () -> this.baseDirectory.resolve(DEFAULT_INBOUND));
  }

}

Furthermore I have simple service which uses the above configuration which just prints out the information on the console:

@Service
public class FirstService {

  private static final Logger LOG = LoggerFactory.getLogger(FirstService.class);

  private final ConfigurationLeiDaD configurationLeiDaD;

  public FirstService(ConfigurationLeiDaD configurationLeiDaD) {
    this.configurationLeiDaD = configurationLeiDaD;
  }

  @EventListener(classes = ApplicationReadyEvent.class)
  void applicationReady(@NonNull ApplicationReadyEvent event) {
    LOG.info("Event {}", event);
    Path inbound = configurationLeiDaD.getInbound();
    LOG.info("inbound: {}", inbound);
  }

}

I'm starting the spring boot (Spring Boot Version 2.4.3) app via:

java -jar target/spring-boot-issue-1.0.0-SNAPSHOT-exec.jar --xyz.base-directory=/Absolute/Directory/Path/

The output of the application on console looks like this (excerpt):

2021-03-24 16:17:05.119  INFO 45592 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2021-03-24 16:17:05.316  INFO 45592 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2021-03-24 16:17:05.325  INFO 45592 --- [           main] io.soebes.simple.MainApplication         : Started MainApplication in 1.772 seconds (JVM running for 2.197)
2021-03-24 16:17:05.327  INFO 45592 --- [           main] io.soebes.simple.service.FirstService    : Event org.springframework.boot.context.event.ApplicationReadyEvent[source=org.springframework.boot.SpringApplication@3f23a3a0]
2021-03-24 16:17:05.328  INFO 45592 --- [           main] io.soebes.simple.service.FirstService    : inbound: /Absolute/Directory/Path/inbound

As you can see in the output of the value is just give as expected.

Now I simply change the Spring Boot version from 2.4.3 to 2.4.4 and rebuild the project and call it the same way:

But now the output looks like:

2021-03-24 16:15:43.073  INFO 45553 --- [           main] i.s.simple.config.ConfigurationLeiDaD    : baseDirectory /private/var/folders/gb/sw0f5qsx4m95znm_fjw3nfwh0000gn/T/tomcat-docbase.8080.10431842645162390813/Absolute/Directory/Path
2021-03-24 16:15:43.201  INFO 45553 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2021-03-24 16:15:43.404  INFO 45553 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2021-03-24 16:15:43.415  INFO 45553 --- [           main] io.soebes.simple.MainApplication         : Started MainApplication in 2.04 seconds (JVM running for 2.477)
2021-03-24 16:15:43.417  INFO 45553 --- [           main] io.soebes.simple.service.FirstService    : Event org.springframework.boot.context.event.ApplicationReadyEvent[source=org.springframework.boot.SpringApplication@5fb97279]
2021-03-24 16:15:43.417  INFO 45553 --- [           main] io.soebes.simple.service.FirstService    : inbound: /private/var/folders/gb/sw0f5qsx4m95znm_fjw3nfwh0000gn/T/tomcat-docbase.8080.10431842645162390813/Absolute/Directory/Path/inbound

As you can see the output of the absolute directory is prefixed by something which is not given via command line...

I have created a small project to reproduce this.

https://github.com/khmarbaise/spring-boot-issue

Just change the version for Spring Boot Version from 2.4.3 to 2.4.4 and call the command line as described in the above examples.

The question is now: Do I have missed something to read in the release notes of 2.4.4 ? Or is there something else I'm missing?

• JDK 11.0.9
• Maven 3.6.3 (for building)
• Spring Boot 2.4.3/2.4.4

Comment From: wilkinsona

Thanks for the report. This is a duplicate of https://github.com/spring-projects/spring-framework/issues/26702.