spring boot2.1.11 upgrade to spring boot2.2.2 stucked when server setups

[sparkcai]

set spring.devtools.restart.enabled=false，
thread info below

"main" #1 prio=5 os_prio=0 tid=0x0000000002cdc800 nid=0x36fc waiting on condition [0x0000000002cce000]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x00000000e5f18978> (a java.util.concurrent.CompletableFuture$Signaller)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at java.util.concurrent.CompletableFuture$Signaller.block(CompletableFuture.java:1693)
        at java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3323)
        at java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1729)
        at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
        at io.lettuce.core.DefaultConnectionFuture.get(DefaultConnectionFuture.java:68)
        at io.lettuce.core.AbstractRedisClient.getConnection(AbstractRedisClient.java:227)
        at io.lettuce.core.RedisClient.connect(RedisClient.java:207)
        at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.lambda$getConnection$1(StandaloneConnectionProvider.java:115)
        at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider$$Lambda$829/996955574.get(Unknown Source)
        at java.util.Optional.orElseGet(Optional.java:267)
        at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.getConnection(StandaloneConnectionProvider.java:115)
        at org.springframework.data.redis.connection.lettuce.LettuceConnection.doGetAsyncDedicatedConnection(LettuceConnection.java:1002)
        at org.springframework.data.redis.connection.lettuce.LettuceConnection.getDedicatedConnection(LettuceConnection.java:985)
        at org.springframework.data.redis.connection.lettuce.LettuceConnection.getConnection(LettuceConnection.java:942)
        at org.springframework.data.redis.connection.lettuce.LettuceServerCommands.getConnection(LettuceServerCommands.java:567)
        at org.springframework.data.redis.connection.lettuce.LettuceServerCommands.getConfig(LettuceServerCommands.java:305)
        at org.springframework.data.redis.connection.DefaultedRedisConnection.getConfig(DefaultedRedisConnection.java:1319)
        at org.springframework.session.data.redis.config.ConfigureNotifyKeyspaceEventsAction.getNotifyOptions(ConfigureNotifyKeyspaceEventsAction.java:76)
        at org.springframework.session.data.redis.config.ConfigureNotifyKeyspaceEventsAction.configure(ConfigureNotifyKeyspaceEventsAction.java:57)
        at org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration$EnableRedisKeyspaceNotificationsInitializer.afterPropertiesSet(RedisHttpSessionConfiguration.java:333)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
        at org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$162/1076641925.getObject(Unknown Source)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
        - locked <0x0000000082f3b330> (a java.util.concurrent.ConcurrentHashMap)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
        - locked <0x00000000829b5e70> (a java.lang.Object)
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
        at com.gpform.UserApplication.main(UserApplication.java:20)

[bclozel]

I don't see the link between the devtools configuration, the thread waiting on a redis connection, and the server being stuck a startup.

Could you provide a sample application that replicates this issue?

[sparkcai]

This is not related to devtools。 is lettuce always get stuck.
spring boot2.1.x's lettuce version is 5.1.x and spring boot2.2.x‘s lettuce version is 5.2.x.
when i use lettuce version is 5.1.x is ok, but when i use lettuce version is 5.2.x, is stucked.

[sparkcai]

below is debug info,the main thread get stuck here.
debug.txt

[snicoll]

This is not related to devtools

Thanks for the feedback but this is a little confusing for us as you've mentioned it explicitly in your original description. We've one more piece of information that you think this is a regression as everything is working fine for you with Spring Boot 2.1.x.

I am afraid the logs and a screenshot doesn't qualify to the sample application @bclozel asked. A zip or a link to a github repo with a small app that we can run ourselves is what we're after. Thank you.

[sparkcai]

thanks you all the help . i original think this is about devtools, so, i explicitly disabled devtools. but the main thread always get stuck.