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.

[snicoll]

@sparkcai alright. We'll resume this one once you've shared the sample we've requested.

[sparkcai]

sample testp.zip
need a redis host

if remove zipkin

or change to Greenwich both are ok.
<spring-cloud.version>Greenwich.SR4</spring-cloud.version>
<spring-boot.version>2.1.10.RELEASE</spring-boot.version>
thanks @bclozel @snicoll

[snicoll]

Thanks for the sample but it looks like from your last comment the issue is Spring Cloud specific. I have removed the Spring Cloud bits from your sample and things are working as expected for me. It looks like adding zipkin leads to the issue so please report this issue with the sample to the zipkin project.

Unrelated but a number of observations on this sample:

• You can't use @AutoConfigureAfter on a user configuration, this is ignored and doesn't do anything
• There are a number of deprecated configuration properties in your config, see the hints in your IDE and upgrade them or use spring-boot-properties-migrator to get a report of what needs to be done
• You don't need to add @EnableAutoConfiguration when @SpringBootApplication is present

[sparkcai]

ok, Thanks very much for your advice.