Hi, @erizzo . Thanks for creating this issue! This appears to be a regression issue in the master branch after adding the topic deletion feature detection. The fix is in PR. it would be merged today.
Startup failure with unreachable cluster in configuration
Running kafka-ui via docker-compose, using the "master" image.

If I have multiple clusters configured and 1 of them is not currently reachable (for example, it requires that I be on the company VPN in order to access), kafka-ui fails at startup.

Here is an example docker-compose config:

```yaml
  kafka-ui:
    image: provectuslabs/kafka-ui:master
    container_name: kafka-ui
    restart: "no"
    ports:
      - "9001:8080"
    environment:
      - KAFKA_CLUSTERS_0_NAME=local
      - KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS=kafka:29092
      - KAFKA_CLUSTERS_0_ZOOKEEPER=zookeeper:2181
      - KAFKA_CLUSTERS_0_SCHEMAREGISTRY=schemaregistry:8081
      - KAFKA_CLUSTERS_1_NAME=QA
      - KAFKA_CLUSTERS_1_BOOTSTRAPSERVERS=qa-env.mycompany.com:40992
      - KAFKA_CLUSTERS_1_ZOOKEEPER=qa-env.mycompany.com:32181
      - KAFKA_CLUSTERS_1_SCHEMAREGISTRY=qa-env.mycompany.com:30081
      
    depends_on:
      - "kafka"
```

If the host `qa-env.mycompany.com` is not reachable, kafka-ui won't even start up. If I comment out or remove all of the KAFKA_CLUSTERS_1_* keys, it starts up fine.
The "latest" image does not have this problem, it will start and the "local" cluster can be browsed/managed ("qa" cluster shows as offline in kafka-ui); so this seems like a regression in the master image.

Here is the startup error log:
```
12:51:08.449 [main] INFO  org.springframework.core.KotlinDetector - Kotlin reflection implementation not found at runtime, related features won't be available.

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.4.RELEASE)

12:51:09.631 [main] INFO  com.provectus.kafka.ui.KafkaUiApplication - Starting KafkaUiApplication on 477724a2e3b3 with PID 1 (/kafka-ui-api.jar started by root in /)
12:51:09.631 [main] DEBUG com.provectus.kafka.ui.KafkaUiApplication - Running with Spring Boot v2.2.4.RELEASE, Spring v5.2.3.RELEASE
12:51:09.632 [main] INFO  com.provectus.kafka.ui.KafkaUiApplication - No active profile set, falling back to default profiles: default

12:51:10.295 [background-preinit] WARN  org.springframework.http.converter.json.Jackson2ObjectMapperBuilder - For Jackson Kotlin classes support please add "com.fasterxml.jackson.module:jackson-module-kotlin" to the classpath

SLF4J: Class path contains multiple SLF4J bindings.

SLF4J: Found binding in [jar:file:/kafka-ui-api.jar!/BOOT-INF/lib/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/kafka-ui-api.jar!/BOOT-INF/lib/log4j-slf4j-impl-2.12.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.

SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]

log4j:WARN No appenders could be found for logger (reactor.util.Loggers$LoggerFactory).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

12:51:12.270 [main] INFO  org.springframework.boot.autoconfigure.security.reactive.ReactiveUserDetailsServiceAutoConfiguration - 

Using generated security password: 9d0ce723-8a96-48e3-9c68-ec6cfa0e724c


12:51:12.331 [main] WARN  org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$JodaDateTimeJacksonConfiguration - Auto-configuration of Jackson's Joda-Time integration is deprecated in favor of using java.time (JSR-310).

12:51:13.866 [main] WARN  org.springframework.boot.web.reactive.context.AnnotationConfigReactiveWebServerApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'deserializationService' defined in URL [jar:file:/kafka-ui-api.jar!/BOOT-INF/classes!/com/provectus/kafka/ui/serde/DeserializationService.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'clustersStorage': Invocation of init method failed; nested exception is org.apache.kafka.common.KafkaException: Failed to create new KafkaAdminClient

12:51:13.890 [main] INFO  org.springframework.boot.autoconfigure.logging.ConditionEvaluationReportLoggingListener - 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.

12:51:13.895 [main] ERROR org.springframework.boot.SpringApplication - Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'deserializationService' defined in URL [jar:file:/kafka-ui-api.jar!/BOOT-INF/classes!/com/provectus/kafka/ui/serde/DeserializationService.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'clustersStorage': Invocation of init method failed; nested exception is org.apache.kafka.common.KafkaException: Failed to create new KafkaAdminClient
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:798) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:228) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1358) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1204) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:66) ~[spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
	at com.provectus.kafka.ui.KafkaUiApplication.main(KafkaUiApplication.java:14) [classes!/:?]
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:?]
	at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [kafka-ui-api.jar:?]
	at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [kafka-ui-api.jar:?]
	at org.springframework.boot.loader.Launcher.launch(Launcher.java:51) [kafka-ui-api.jar:?]
	at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:52) [kafka-ui-api.jar:?]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'clustersStorage': Invocation of init method failed; nested exception is org.apache.kafka.common.KafkaException: Failed to create new KafkaAdminClient
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:160) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:416) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1788) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1287) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:885) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:789) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	... 27 more

Caused by: org.apache.kafka.common.KafkaException: Failed to create new KafkaAdminClient
	at org.apache.kafka.clients.admin.KafkaAdminClient.createInternal(KafkaAdminClient.java:540) ~[kafka-clients-2.8.0.jar!/:?]
	at org.apache.kafka.clients.admin.Admin.create(Admin.java:134) ~[kafka-clients-2.8.0.jar!/:?]
	at org.apache.kafka.clients.admin.AdminClient.create(AdminClient.java:39) ~[kafka-clients-2.8.0.jar!/:?]
	at com.provectus.kafka.ui.service.AdminClientServiceImpl.lambda$createAdminClient$2(AdminClientServiceImpl.java:41) ~[classes!/:?]
	at reactor.core.publisher.MonoSupplier.call(MonoSupplier.java:85) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
	at reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:126) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]

	at reactor.core.publisher.MonoFlatMap.subscribeOrReturn(MonoFlatMap.java:53) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]

	at reactor.core.publisher.Mono.subscribe(Mono.java:4090) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]

	at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:75) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]

	at reactor.core.publisher.Operators.complete(Operators.java:132) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
	at reactor.core.publisher.MonoEmpty.subscribe(MonoEmpty.java:45) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]

	at reactor.core.publisher.Mono.subscribe(Mono.java:4105) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
	at reactor.core.publisher.Mono.blockOptional(Mono.java:1707) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
	at com.provectus.kafka.ui.service.FeatureServiceImpl.topicDeletionCheck(FeatureServiceImpl.java:57) ~[classes!/:?]
	at com.provectus.kafka.ui.service.FeatureServiceImpl.getAvailableFeatures(FeatureServiceImpl.java:41) ~[classes!/:?]
	at com.provectus.kafka.ui.service.ClustersStorage.init(ClustersStorage.java:39) ~[classes!/:?]
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:?]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:389) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:333) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:157) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:416) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1788) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]

	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]

	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]

	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]

	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1287) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:885) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:789) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	... 27 more
	Suppressed: java.lang.Exception: #block terminated with an error
		at reactor.core.publisher.BlockingOptionalMonoSubscriber.blockingGet(BlockingOptionalMonoSubscriber.java:139) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
		at reactor.core.publisher.Mono.blockOptional(Mono.java:1708) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
		at com.provectus.kafka.ui.service.FeatureServiceImpl.topicDeletionCheck(FeatureServiceImpl.java:57) ~[classes!/:?]
		at com.provectus.kafka.ui.service.FeatureServiceImpl.getAvailableFeatures(FeatureServiceImpl.java:41) ~[classes!/:?]
		at com.provectus.kafka.ui.service.ClustersStorage.init(ClustersStorage.java:39) ~[classes!/:?]
		at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
		at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
		at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
		at java.lang.reflect.Method.invoke(Unknown Source) ~[?:?]
		at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:389) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:333) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:157) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:416) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1788) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]

		at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1287) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:885) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]

		at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:789) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:228) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1358) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1204) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
		at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:66) ~[spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
		at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
		at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
		at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
		at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
		at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.4.RELEASE.jar!/:2.2.4.RELEASE]
		at com.provectus.kafka.ui.KafkaUiApplication.main(KafkaUiApplication.java:14) [classes!/:?]
		at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
		at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:?]

		at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
		at java.lang.reflect.Method.invoke(Unknown Source) ~[?:?]
		at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [kafka-ui-api.jar:?]
		at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [kafka-ui-api.jar:?]
		at org.springframework.boot.loader.Launcher.launch(Launcher.java:51) [kafka-ui-api.jar:?]
		at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:52) [kafka-ui-api.jar:?]
Caused by: org.apache.kafka.common.config.ConfigException: No resolvable bootstrap urls given in bootstrap.servers
	at org.apache.kafka.clients.ClientUtils.parseAndValidateAddresses(ClientUtils.java:89) ~[kafka-clients-2.8.0.jar!/:?]
	at org.apache.kafka.clients.ClientUtils.parseAndValidateAddresses(ClientUtils.java:48) ~[kafka-clients-2.8.0.jar!/:?]
	at org.apache.kafka.clients.admin.KafkaAdminClient.createInternal(KafkaAdminClient.java:494) ~[kafka-clients-2.8.0.jar!/:?]
	at org.apache.kafka.clients.admin.Admin.create(Admin.java:134) ~[kafka-clients-2.8.0.jar!/:?]
	at org.apache.kafka.clients.admin.AdminClient.create(AdminClient.java:39) ~[kafka-clients-2.8.0.jar!/:?]
	at com.provectus.kafka.ui.service.AdminClientServiceImpl.lambda$createAdminClient$2(AdminClientServiceImpl.java:41) ~[classes!/:?]
	at reactor.core.publisher.MonoSupplier.call(MonoSupplier.java:85) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]

	at reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:126) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]

	at reactor.core.publisher.MonoFlatMap.subscribeOrReturn(MonoFlatMap.java:53) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
	at reactor.core.publisher.Mono.subscribe(Mono.java:4090) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
	at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:75) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
	at reactor.core.publisher.Operators.complete(Operators.java:132) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
	at reactor.core.publisher.MonoEmpty.subscribe(MonoEmpty.java:45) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
	at reactor.core.publisher.Mono.subscribe(Mono.java:4105) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
	at reactor.core.publisher.Mono.blockOptional(Mono.java:1707) ~[reactor-core-3.3.2.RELEASE.jar!/:3.3.2.RELEASE]
	at com.provectus.kafka.ui.service.FeatureServiceImpl.topicDeletionCheck(FeatureServiceImpl.java:57) ~[classes!/:?]
	at com.provectus.kafka.ui.service.FeatureServiceImpl.getAvailableFeatures(FeatureServiceImpl.java:41) ~[classes!/:?]
	at com.provectus.kafka.ui.service.ClustersStorage.init(ClustersStorage.java:39) ~[classes!/:?]

	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]

	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:?]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:389) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:333) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:157) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:416) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1788) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]

	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1287) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:885) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:789) ~[spring-beans-5.2.3.RELEASE.jar!/:5.2.3.RELEASE]
	... 27 more
```
kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/ClustersStorage.java kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/FeatureService.java kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/FeatureServiceImpl.java kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/KafkaService.java
kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/ClustersStorage.java kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/FeatureService.java kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/FeatureServiceImpl.java kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/KafkaService.java
kafka-ui-api/src/test/java/com/provectus/kafka/ui/service/OffsetsResetServiceTest.java
diff --git a/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/ClustersStorage.java b/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/ClustersStorage.java
index 6c58470e59b..638af227753 100644
--- a/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/ClustersStorage.java
+++ b/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/ClustersStorage.java
@@ -22,7 +22,6 @@ public class ClustersStorage {
   private final ClustersProperties clusterProperties;
 
   private final ClusterMapper clusterMapper = Mappers.getMapper(ClusterMapper.class);
-  private final FeatureService featureService;
 
   @PostConstruct
   public void init() {
@@ -36,7 +35,6 @@ public void init() {
           clusterProperties.getName(),
           cluster.toBuilder()
               .topics(new HashMap<>())
-              .features(featureService.getAvailableFeatures(cluster))
               .build()
       );
     }
diff --git a/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/FeatureService.java b/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/FeatureService.java
index 7abe4870ee2..58610259da0 100644
--- a/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/FeatureService.java
+++ b/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/FeatureService.java
@@ -2,7 +2,7 @@
 
 import com.provectus.kafka.ui.model.Feature;
 import com.provectus.kafka.ui.model.KafkaCluster;
-import java.util.List;
+import reactor.core.publisher.Flux;
 
 public interface FeatureService {
   /**
@@ -11,5 +11,5 @@ public interface FeatureService {
    * @param cluster - cluster
    * @return List of Feature
    */
-  List<Feature> getAvailableFeatures(KafkaCluster cluster);
+  Flux<Feature> getAvailableFeatures(KafkaCluster cluster);
 }
diff --git a/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/FeatureServiceImpl.java b/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/FeatureServiceImpl.java
index 919b19d30c4..413c237d9ce 100644
--- a/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/FeatureServiceImpl.java
+++ b/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/FeatureServiceImpl.java
@@ -12,6 +12,8 @@
 import lombok.extern.log4j.Log4j2;
 import org.apache.kafka.common.Node;
 import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
 
 @Service
 @RequiredArgsConstructor
@@ -21,31 +23,32 @@ public class FeatureServiceImpl implements FeatureService {
   private final BrokerService brokerService;
 
   @Override
-  public List<Feature> getAvailableFeatures(KafkaCluster cluster) {
-    List<Feature> features = new ArrayList<>();
+  public Flux<Feature> getAvailableFeatures(KafkaCluster cluster) {
+    List<Mono<Feature>> features = new ArrayList<>();
 
     if (Optional.ofNullable(cluster.getKafkaConnect())
         .filter(Predicate.not(List::isEmpty))
         .isPresent()) {
-      features.add(Feature.KAFKA_CONNECT);
+      features.add(Mono.just(Feature.KAFKA_CONNECT));
     }
 
     if (cluster.getKsqldbServer() != null) {
-      features.add(Feature.KSQL_DB);
+      features.add(Mono.just(Feature.KSQL_DB));
     }
 
     if (cluster.getSchemaRegistry() != null) {
-      features.add(Feature.SCHEMA_REGISTRY);
+      features.add(Mono.just(Feature.SCHEMA_REGISTRY));
     }
 
-    if (topicDeletionCheck(cluster)) {
-      features.add(Feature.TOPIC_DELETION);
-    }
+    features.add(
+        topicDeletionCheck(cluster)
+            .flatMap(r -> r ? Mono.just(Feature.TOPIC_DELETION) : Mono.empty())
+    );
 
-    return features;
+    return Flux.fromIterable(features).flatMap(m -> m);
   }
 
-  private boolean topicDeletionCheck(KafkaCluster cluster) {
+  private Mono<Boolean> topicDeletionCheck(KafkaCluster cluster) {
     return brokerService.getController(cluster)
         .map(Node::id)
         .flatMap(broker -> brokerService.getBrokerConfigMap(cluster, broker))
@@ -54,6 +57,6 @@ private boolean topicDeletionCheck(KafkaCluster cluster) {
             return Boolean.parseBoolean(config.get(DELETE_TOPIC_ENABLE).getValue());
           }
           return false;
-        }).blockOptional().orElse(false);
+        });
   }
 }
diff --git a/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/KafkaService.java b/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/KafkaService.java
index e94596b4547..d888a388a01 100644
--- a/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/KafkaService.java
+++ b/kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/KafkaService.java
@@ -1,9 +1,7 @@
 package com.provectus.kafka.ui.service;
 
-import com.provectus.kafka.ui.exception.IllegalEntityStateException;
 import com.provectus.kafka.ui.exception.InvalidRequestApiException;
 import com.provectus.kafka.ui.exception.LogDirNotFoundApiException;
-import com.provectus.kafka.ui.exception.NotFoundException;
 import com.provectus.kafka.ui.exception.TopicMetadataException;
 import com.provectus.kafka.ui.exception.TopicOrPartitionNotFoundException;
 import com.provectus.kafka.ui.exception.ValidationException;
@@ -11,7 +9,6 @@
 import com.provectus.kafka.ui.model.CleanupPolicy;
 import com.provectus.kafka.ui.model.CreateTopicMessage;
 import com.provectus.kafka.ui.model.ExtendedAdminClient;
-import com.provectus.kafka.ui.model.InternalBrokerConfig;
 import com.provectus.kafka.ui.model.InternalBrokerDiskUsage;
 import com.provectus.kafka.ui.model.InternalBrokerMetrics;
 import com.provectus.kafka.ui.model.InternalClusterMetrics;
@@ -104,6 +101,8 @@ public class KafkaService {
   private final ClustersStorage clustersStorage;
   private final DeserializationService deserializationService;
   private final AdminClientService adminClientService;
+  private final FeatureService featureService;
+
 
   public KafkaCluster getUpdatedCluster(KafkaCluster cluster, InternalTopic updatedTopic) {
     final Map<String, InternalTopic> topics =
@@ -142,6 +141,9 @@ public Mono<KafkaCluster> getUpdatedCluster(KafkaCluster cluster) {
                             ).map(segmentSizeDto -> buildFromData(cluster, version, segmentSizeDto))
                         )
             )
+        ).flatMap(
+            nc ->  featureService.getAvailableFeatures(cluster).collectList()
+                .map(f -> nc.toBuilder().features(f).build())
         ).doOnError(e ->
             log.error("Failed to collect cluster {} info", cluster.getName(), e)
         ).onErrorResume(

diff --git a/kafka-ui-api/src/test/java/com/provectus/kafka/ui/service/OffsetsResetServiceTest.java b/kafka-ui-api/src/test/java/com/provectus/kafka/ui/service/OffsetsResetServiceTest.java
index 0130d2698aa..779bda4d3ea 100644
--- a/kafka-ui-api/src/test/java/com/provectus/kafka/ui/service/OffsetsResetServiceTest.java
+++ b/kafka-ui-api/src/test/java/com/provectus/kafka/ui/service/OffsetsResetServiceTest.java
@@ -52,8 +52,10 @@ public class OffsetsResetServiceTest extends AbstractBaseTest {
   @BeforeEach
   void init() {
     AdminClientServiceImpl adminClientService = new AdminClientServiceImpl();
+    BrokerService brokerService = new BrokerServiceImpl(adminClientService);
+    FeatureService featureService = new FeatureServiceImpl(brokerService);
     adminClientService.setClientTimeout(5_000);
-    kafkaService = new KafkaService(null, null, null, null, adminClientService);
+    kafkaService = new KafkaService(null, null, null, null, adminClientService, featureService);
     offsetsResetService = new OffsetsResetService(kafkaService);
 
     createTopic(new NewTopic(topic, PARTITIONS, (short) 1));
