This is the failure that prevents the app from deploying:

2020-11-02 16:38:19,678 INFO  [stdout] (ServerService Thread Pool -- 91) 
2020-11-02 16:38:19,678 INFO  [stdout] (ServerService Thread Pool -- 91)   .   ____          _            __ _ _
2020-11-02 16:38:19,678 INFO  [stdout] (ServerService Thread Pool -- 91)  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
2020-11-02 16:38:19,679 INFO  [stdout] (ServerService Thread Pool -- 91) ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
2020-11-02 16:38:19,679 INFO  [stdout] (ServerService Thread Pool -- 91)  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
2020-11-02 16:38:19,679 INFO  [stdout] (ServerService Thread Pool -- 91)   '  |____| .__|_| |_|_| |_\__, | / / / /
2020-11-02 16:38:19,680 INFO  [stdout] (ServerService Thread Pool -- 91)  =========|_|==============|___/=/_/_/_/
2020-11-02 16:38:19,681 INFO  [stdout] (ServerService Thread Pool -- 91)  :: Spring Boot ::       (v2.4.0-SNAPSHOT)
2020-11-02 16:38:19,681 INFO  [stdout] (ServerService Thread Pool -- 91) 
2020-11-02 16:38:19,689 INFO  [org.hibernate.validator.internal.util.Version] (background-preinit) HV000001: Hibernate Validator 6.0.20.Final
2020-11-02 16:38:19,765 INFO  [sample.app.DeploymentTestApplication] (ServerService Thread Pool -- 91) Starting DeploymentTestApplication using Java 11.0.8 on 52c0eb6f7ecd with PID 103 (started by jboss in /opt/jboss)
2020-11-02 16:38:19,767 INFO  [sample.app.DeploymentTestApplication] (ServerService Thread Pool -- 91) No active profile set, falling back to default profiles: default
2020-11-02 16:38:20,901 INFO  [io.undertow.servlet] (ServerService Thread Pool -- 91) Initializing Spring embedded WebApplicationContext
2020-11-02 16:38:20,902 INFO  [org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext] (ServerService Thread Pool -- 91) Root WebApplicationContext: initialization completed in 1096 ms
2020-11-02 16:38:21,136 WARN  [org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext] (ServerService Thread Pool -- 91) Exception encountered during context initialization - cancelling refresh attempt: org.s
pringframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webMvcMetricsFilter' defined in class path resource 
[org/springframework/boot/actuate/autoconfigure/metrics/web/servlet/WebMvcMetricsAutoConfiguration.class]: Unsatisfied dependency expressed through method 'webMvcMetricsFilter' parameter 0; nested exception is org.springframework.beans.factory.BeanC
reationException: Error creating bean with name 'simpleMeterRegistry' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/export/simple/SimpleMetricsExportAutoConfiguration.class]: Initialization of bean failed; ne
sted exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jvmGcMetrics' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/JvmMetricsAutoConfiguration.class]: Post-p
rocessing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [io.micrometer.core.instrument.binder.jvm.JvmGcMetrics] from ClassLoader [ModuleClassLoader for Module "deployment.spring-boo
t.war" from Service Module Loader]
2020-11-02 16:38:21,150 INFO  [org.springframework.boot.autoconfigure.logging.ConditionEvaluationReportLoggingListener] (ServerService Thread Pool -- 91) 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-11-02 16:38:21,169 ERROR [org.springframework.boot.SpringApplication] (ServerService Thread Pool -- 91) Application run failed: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springf
ramework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webMvcMetricsFilter' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/web/servlet/WebMvcMetricsAutoConfiguration.class]: Unsa
tisfied dependency expressed through method 'webMvcMetricsFilter' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'simpleMeterRegistry' defined in class path resource [org/sprin
gframework/boot/actuate/autoconfigure/metrics/export/simple/SimpleMetricsExportAutoConfiguration.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jvmGc
Metrics' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/JvmMetricsAutoConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to intr
ospect Class [io.micrometer.core.instrument.binder.jvm.JvmGcMetrics] from ClassLoader [ModuleClassLoader for Module "deployment.spring-boot.war" from Service Module Loader]
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:162)
    at deployment.spring-boot.war//org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:582)
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144)
    at deployment.spring-boot.war//org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767)
    at deployment.spring-boot.war//org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
    at deployment.spring-boot.war//org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426)
    at deployment.spring-boot.war//org.springframework.boot.SpringApplication.run(SpringApplication.java:326)
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:173)
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:153)
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:95)
    at deployment.spring-boot.war//org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:174)
    at io.undertow.servlet@2.1.3.Final//io.undertow.servlet.core.DeploymentManagerImpl$1.call(DeploymentManagerImpl.java:204)
    at io.undertow.servlet@2.1.3.Final//io.undertow.servlet.core.DeploymentManagerImpl$1.call(DeploymentManagerImpl.java:186)
    at io.undertow.servlet@2.1.3.Final//io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:42)
    at io.undertow.servlet@2.1.3.Final//io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
    at org.wildfly.extension.undertow@20.0.1.Final//org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
    at org.wildfly.extension.undertow@20.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
    at org.wildfly.extension.undertow@20.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
    at org.wildfly.extension.undertow@20.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
    at org.wildfly.extension.undertow@20.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
    at io.undertow.servlet@2.1.3.Final//io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:252)
    at org.wildfly.extension.undertow@20.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentService.startContext(UndertowDeploymentService.java:96)
    at org.wildfly.extension.undertow@20.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:78)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at org.jboss.threads@2.3.3.Final//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
    at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982)
    at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
    at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
    at java.base/java.lang.Thread.run(Thread.java:834)
    at org.jboss.threads@2.3.3.Final//org.jboss.threads.JBossThread.run(JBossThread.java:485)
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webMvcMetricsFilter' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/web/servlet/WebMvcMetricsAutoConf
iguration.class]: Unsatisfied dependency expressed through method 'webMvcMetricsFilter' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'simpleMeterRegistry' defined in class pa
th resource [org/springframework/boot/actuate/autoconfigure/metrics/export/simple/SimpleMetricsExportAutoConfiguration.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating
 bean with name 'jvmGcMetrics' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/JvmMetricsAutoConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateExc
eption: Failed to introspect Class [io.micrometer.core.instrument.binder.jvm.JvmGcMetrics] from ClassLoader [ModuleClassLoader for Module "deployment.spring-boot.war" from Service Module Loader]
    at deployment.spring-boot.war//org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:798)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:539)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1336)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1179)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:571)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:213)
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.ServletContextInitializerBeans.getOrderedBeansOfType(ServletContextInitializerBeans.java:212)
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.ServletContextInitializerBeans.getOrderedBeansOfType(ServletContextInitializerBeans.java:203)
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.ServletContextInitializerBeans.addServletContextInitializerBeans(ServletContextInitializerBeans.java:97)
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.ServletContextInitializerBeans.<init>(ServletContextInitializerBeans.java:86)
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.getServletContextInitializerBeans(ServletWebServerApplicationContext.java:259)
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.selfInitialize(ServletWebServerApplicationContext.java:233)
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:190)
    at deployment.spring-boot.war//org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:159)
    ... 30 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'simpleMeterRegistry' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/export/simple/SimpleMetricsExportAutoConfi
guration.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jvmGcMetrics' defined in class path resource [org/springframework/boot/actuate/autoconfigure/
metrics/JvmMetricsAutoConfiguration.class]: Post-processing of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [io.micrometer.core.instrument.binder.jvm.JvmGcMetrics] from ClassLoader [M
oduleClassLoader for Module "deployment.spring-boot.war" from Service Module Loader]
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:617)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
    at deployment.spring-boot.war//org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1367)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1287)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:885)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:789)
    ... 47 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jvmGcMetrics' defined in class path resource [org/springframework/boot/actuate/autoconfigure/metrics/JvmMetricsAutoConfiguration.class]: Post-processi
ng of merged bean definition failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [io.micrometer.core.instrument.binder.jvm.JvmGcMetrics] from ClassLoader [ModuleClassLoader for Module "deployment.spring-boot.war" 
from Service Module Loader]
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:586)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
    at deployment.spring-boot.war//org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1592)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1549)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveMultipleBeans(DefaultListableBeanFactory.java:1393)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1325)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.DefaultListableBeanFactory$DependencyObjectProvider.resolveStream(DefaultListableBeanFactory.java:2095)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.DefaultListableBeanFactory$DependencyObjectProvider.orderedStream(DefaultListableBeanFactory.java:2089)
    at deployment.spring-boot.war//org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryConfigurer.addBinders(MeterRegistryConfigurer.java:86)
    at deployment.spring-boot.war//org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryConfigurer.configure(MeterRegistryConfigurer.java:68)
    at deployment.spring-boot.war//org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryPostProcessor.postProcessAfterInitialization(MeterRegistryPostProcessor.java:64)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:444)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:609)
    ... 57 more
Caused by: java.lang.IllegalStateException: Failed to introspect Class [io.micrometer.core.instrument.binder.jvm.JvmGcMetrics] from ClassLoader [ModuleClassLoader for Module "deployment.spring-boot.war" from Service Module Loader]
    at deployment.spring-boot.war//org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:481)
    at deployment.spring-boot.war//org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321)
    at deployment.spring-boot.war//org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.buildLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:232)
    at deployment.spring-boot.war//org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.findLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:210)
    at deployment.spring-boot.war//org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(InitDestroyAnnotationBeanPostProcessor.java:149)
    at deployment.spring-boot.war//org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(CommonAnnotationBeanPostProcessor.java:294)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:1100)
    at deployment.spring-boot.war//org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:583)
    ... 75 more
Caused by: java.lang.NoClassDefFoundError: com/sun/management/GcInfo
    at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
    at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3166)
    at java.base/java.lang.Class.getDeclaredMethods(Class.java:2309)
    at deployment.spring-boot.war//org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463)
    ... 82 more
Caused by: java.lang.ClassNotFoundException: com.sun.management.GcInfo from [Module "deployment.spring-boot.war" from Service Module Loader]
    at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:255)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:410)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:398)
    at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:116)
    ... 86 more

I'm not sure why it's started failing now. If it was a change in Micrometer, I would have expected it to fail when we upgraded. It could be that the Docker image has changed. We're using jboss/wildfly:20.0.1.Final which isn't guaranteed to be stable.

Comment From: wilkinsona

I don't understand why we've only started seeing the failure today, but I believe this is due to the changes made in Micrometer for https://github.com/micrometer-metrics/micrometer/pull/2306. com.sun.management.GcInfo now appears in a method signature which causes a failure when the class is being introspected. Something similar has been seen and fixed in the past: https://github.com/micrometer-metrics/micrometer/pull/401. I think we need another similar change in Micrometer. To that end I have opened https://github.com/micrometer-metrics/micrometer/issues/2331. We also need to understand why we didn't catch the problem sooner.

Comment From: wilkinsona

The build is configured incorrectly. When we upgraded to Micrometer 1.6.0, the deployment integration tests did not run as there was a cache hit: https://ge.spring.io/s/3u5rcskr6zr7q/timeline?anchor=cg5edneel26cs&taskFilter=spring-boot-deployment-tests. The war that the integration tests deploy was built. This should have been sufficient to trigger the intTest task but it's only configured with an explicit dependency on the war task. This just determines task ordering rather than influencing up-to-date checks and caching. The file produced by the war task should be an input of the intTest task. This will set up the necessary dependency relationship while also ensuring that the task runs when the war changes.