SpringBoot DriverTimeoutException in integration tests that use Cassandra

I am using 'org.springframework.boot:spring-boot-starter-data-cassandra-reactive' in my project. I have upgraded my spring boot project from 2.1.7.RELEASE to 2.3.1.RELEASE. Now my junit integration tests are shaky. The chance to success the is below 50 percent.

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Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cassandraSession' defined in class path resource [xxx/TestCassandraConfiguration.class]: Invocation of init method failed; nested exception is com.datastax.oss.driver.api.core.DriverTimeoutException: Query timed out after PT2S
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1796)
    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.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:227)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveNamedBean(DefaultListableBeanFactory.java:1172)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveBean(DefaultListableBeanFactory.java:420)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:350)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:343)
    at org.springframework.data.cassandra.config.AbstractSessionConfiguration.requireBeanOfType(AbstractSessionConfiguration.java:100)
    at org.springframework.data.cassandra.config.AbstractSessionConfiguration.getRequiredSession(AbstractSessionConfiguration.java:200)
    at org.springframework.data.cassandra.config.AbstractReactiveCassandraConfiguration.reactiveCassandraSession(AbstractReactiveCassandraConfiguration.java:53)
    at xxx.TestCassandraConfiguration$$EnhancerBySpringCGLIB$$61d9359a.CGLIB$reactiveCassandraSession$9(<generated>)
    at xxx.TestCassandraConfiguration$$EnhancerBySpringCGLIB$$61d9359a$$FastClassBySpringCGLIB$$4cae1b7b.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244)
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331)
    at xxx.TestCassandraConfiguration$$EnhancerBySpringCGLIB$$61d9359a.reactiveCassandraSession(<generated>)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
    ... 246 more
Caused by: com.datastax.oss.driver.api.core.DriverTimeoutException: Query timed out after PT2S
    at com.datastax.oss.driver.api.core.DriverTimeoutException.copy(DriverTimeoutException.java:34)
    at com.datastax.oss.driver.internal.core.util.concurrent.CompletableFutures.getUninterruptibly(CompletableFutures.java:149)
    at com.datastax.oss.driver.internal.core.cql.CqlRequestSyncProcessor.process(CqlRequestSyncProcessor.java:53)
    at com.datastax.oss.driver.internal.core.cql.CqlRequestSyncProcessor.process(CqlRequestSyncProcessor.java:30)
    at com.datastax.oss.driver.internal.core.session.DefaultSession.execute(DefaultSession.java:230)
    at com.datastax.oss.driver.api.core.cql.SyncCqlSession.execute(SyncCqlSession.java:53)
    at com.datastax.oss.driver.api.core.cql.SyncCqlSession.execute(SyncCqlSession.java:73)
    at org.springframework.data.cassandra.config.CqlSessionFactoryBean.lambda$executeCql$3(CqlSessionFactoryBean.java:664)
    at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
    at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)
    at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658)
    at org.springframework.data.cassandra.config.CqlSessionFactoryBean.executeCql(CqlSessionFactoryBean.java:662)
    at org.springframework.data.cassandra.config.CqlSessionFactoryBean.executeSpecificationsAndScripts(CqlSessionFactoryBean.java:677)
    at org.springframework.data.cassandra.config.CqlSessionFactoryBean.initializeCluster(CqlSessionFactoryBean.java:503)
    at org.springframework.data.cassandra.config.CqlSessionFactoryBean.afterPropertiesSet(CqlSessionFactoryBean.java:430)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792)
    ... 269 more

Comment From: wilkinsona

Thanks for the report. When moving from Spring Boot 2.1 to 2.3 you are picking up a new version of Spring Data Cassandra and of Cassandra's Java driver. I think that's likely to be where the change in behaviour lies. It may be as simple as a default timeout having changed. I'd recommend verifying the timeout that's being used and, if it's the same in both case, opening a Spring Data Cassandra issue.