I'm trying to configure Spring Cloud Vault in my Spring Boot application (v. 2.4.2). I'm using Spring Cloud v. 2020.0.5 (which, according to the Release train, should be fine).
C:\Tools\jdk1.8.0_92\bin\java.exe -Dspring.profiles.active=DEV,local -javaagent:C:\Apps\IC\idealC-2021.1.2\lib\idea_rt.jar=52879:C:\Apps\IC\idealC-2021.1.2\bin -Dfile.encoding=UTF-8 -classpath 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com.example.ExampleServApplication
17:00:24.235 [main] ERROR org.springframework.boot.SpringApplication - Application run failed
java.lang.IllegalArgumentException: Unable to instantiate org.springframework.boot.context.config.ConfigDataLoader [org.springframework.cloud.vault.config.VaultConfigDataLoader]
at org.springframework.boot.util.Instantiator.instantiate(Instantiator.java:103)
at org.springframework.boot.util.Instantiator.instantiate(Instantiator.java:90)
at org.springframework.boot.context.config.ConfigDataLoaders.<init>(ConfigDataLoaders.java:75)
at org.springframework.boot.context.config.ConfigDataLoaders.<init>(ConfigDataLoaders.java:56)
at org.springframework.boot.context.config.ConfigDataEnvironment.<init>(ConfigDataEnvironment.java:155)
at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.getConfigDataEnvironment(ConfigDataEnvironmentPostProcessor.java:108)
at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.postProcessEnvironment(ConfigDataEnvironmentPostProcessor.java:97)
at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.postProcessEnvironment(ConfigDataEnvironmentPostProcessor.java:89)
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEnvironmentPreparedEvent(EnvironmentPostProcessorApplicationListener.java:100)
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEvent(EnvironmentPostProcessorApplicationListener.java:86)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131)
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:82)
at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:63)
at java.util.ArrayList.forEach(ArrayList.java:1249)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:117)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:111)
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:62)
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:362)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:144)
at com.example.ExampleServApplication.main(ExampleServApplication.java:29)
Caused by: java.lang.IllegalAccessException: Unable to find suitable constructor
at org.springframework.boot.util.Instantiator.instantiate(Instantiator.java:118)
at org.springframework.boot.util.Instantiator.instantiate(Instantiator.java:100)
... 23 common frames omitted
Any idea what might be wrong ? Am I missing some dependencies ?
I found the problem. It seems that these particular set of versions is incompatible (even though the release train says otherwise):
The problem is that the class ConfigDataLoaders supports DeferredLogFactory injection only in spring-boot 2.4.3:
https://github.com/spring-projects/spring-boot/commit/1def245a2cb7f5aa520531059956c3c3794625d7
On the other hand, starting with Spring Cloud 3.0.2, VaultConfigDataLoader has a new constructor accepting a DeferredLogFactory:
https://github.com/spring-cloud/spring-cloud-vault/commit/a9fd88c3b768a1f6e485851423dd8f62afae71ba
So, either use Spring Boot 2.4.2 and Spring Cloud 3.0.1 (or lower) or use Spring Boot 2.4.3 and Spring Cloud 3.0.2+.
I hope this investigation will save somebody some time, as it took me about half a day..