Small question regarding a Spring Webflux Reactive Cassandra application please.

On a setup Spring Boot 2.6.4 with Webflux and reactive Cassandra, I am using the app to insert some data in Cassandra tables.

Things works fine, until when there is a higher load, I am seeing an issue (stack trace attached)

The thing is, reading some documentation, I thought this piece of code would help solve the issue:

```
    @Bean
    public DriverConfigLoaderBuilderCustomizer defaultProfile(){
      return builder -> builder
        .withInt(DefaultDriverOption.METADATA_SCHEMA_REQUEST_TIMEOUT, 5000)
        .build();
    }

```

(here is my Cassandra Config, note I am using `CqlSession.builder()`)

```
    protected CqlSession cqlLocalSession() {
      return CqlSession.builder()
        .addContactEndPoint(new DefaultEndPoint(new InetSocketAddress(contactPoints, port)))
        .withKeyspace(keyspace)
        .withLocalDatacenter(datacenter)
        .withAuthCredentials(username, passPhrase)
        .build();
    }

```

Unfortunately, the `DriverConfigLoaderBuilderCustomizer` does not seem to work, as I am still facing Query timed out after PT2S; (I would have at least expected to see PT5S.

May I ask what is the issue, and how to properly increase the timeout please?

Thank you

```
org.springframework.data.cassandra.CassandraUncategorizedException: ReactivePreparedStatementCallback; CQL [INSERT INTO mutable (x,y,z) VALUES (?,?,?)]; Query timed out after PT2S; nested exception is com.datastax.oss.driver.api.core.DriverTimeoutException: Query timed out after PT2S
    at org.springframework.data.cassandra.core.cql.CassandraExceptionTranslator.translate(CassandraExceptionTranslator.java:162) ~[spring-data-cassandra-3.3.2.jar!/:3.3.2]
    Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
    *__checkpoint ⇢ Handler myHandler [DispatcherHandler]
Original Stack Trace:
        at org.springframework.data.cassandra.core.cql.CassandraExceptionTranslator.translate(CassandraExceptionTranslator.java:162) ~[spring-data-cassandra-3.3.2.jar!/:3.3.2]
        at org.springframework.data.cassandra.core.cql.ReactiveCassandraAccessor.translate(ReactiveCassandraAccessor.java:149) ~[spring-data-cassandra-3.3.2.jar!/:3.3.2]
        at org.springframework.data.cassandra.core.cql.ReactiveCqlTemplate.lambda$translateException$15(ReactiveCqlTemplate.java:820) ~[spring-data-cassandra-3.3.2.jar!/:3.3.2]
        at reactor.core.publisher.Flux.lambda$onErrorMap$28(Flux.java:6911) ~[reactor-core-3.4.15.jar!/:3.4.15]
        at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:94) ~[reactor-core-3.4.15.jar!/:3.4.15]
        at org.springframework.cloud.sleuth.instrument.reactor.ScopePassingSpanSubscriber.onError(ScopePassingSpanSubscriber.java:96) ~[spring-cloud-sleuth-instrumentation-3.1.1.jar!/:3.1.1]
        at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onError(MonoFlatMapMany.java:204) ~[reactor-core-3.4.15.jar!/:3.4.15]
        at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onError(FluxContextWrite.java:121) ~[reactor-core-3.4.15.jar!/:3.4.15]
        at org.springframework.cloud.sleuth.instrument.reactor.ScopePassingSpanSubscriber.onError(ScopePassingSpanSubscriber.java:96) ~[spring-cloud-sleuth-instrumentation-3.1.1.jar!/:3.1.1]
        at reactor.core.publisher.MonoCompletionStage.lambda$subscribe$0(MonoCompletionStage.java:80) ~[reactor-core-3.4.15.jar!/:3.4.15]
        at java.base/java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:859) ~[na:na]
        at java.base/java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:837) ~[na:na]
        at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:506) ~[na:na]
        at java.base/java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:2088) ~[na:na]
        at com.datastax.oss.driver.internal.core.cql.CqlPrepareAsyncProcessor.lambda$process$1(CqlPrepareAsyncProcessor.java:71) ~[java-driver-core-4.13.0.jar!/:na]
        at java.base/java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:859) ~[na:na]
        at java.base/java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:837) ~[na:na]
        at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:506) ~[na:na]
        at java.base/java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:2088) ~[na:na]
        at com.datastax.oss.driver.internal.core.cql.CqlPrepareHandler.setFinalError(CqlPrepareHandler.java:320) ~[java-driver-core-4.13.0.jar!/:na]
        at com.datastax.oss.driver.internal.core.cql.CqlPrepareHandler.lambda$scheduleTimeout$1(CqlPrepareHandler.java:163) ~[java-driver-core-4.13.0.jar!/:na]
        at io.netty.util.HashedWheelTimer$HashedWheelTimeout.run(HashedWheelTimer.java:715) ~[netty-common-4.1.74.Final.jar!/:4.1.74.Final]
        at io.netty.util.concurrent.ImmediateExecutor.execute(ImmediateExecutor.java:34) ~[netty-common-4.1.74.Final.jar!/:4.1.74.Final]
        at io.netty.util.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:703) ~[netty-common-4.1.74.Final.jar!/:4.1.74.Final]
        at io.netty.util.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:790) ~[netty-common-4.1.74.Final.jar!/:4.1.74.Final]
        at io.netty.util.HashedWheelTimer$Worker.run(HashedWheelTimer.java:503) ~[netty-common-4.1.74.Final.jar!/:4.1.74.Final]
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.74.Final.jar!/:4.1.74.Final]
        at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na]
Caused by: com.datastax.oss.driver.api.core.DriverTimeoutException: Query timed out after PT2S
    at com.datastax.oss.driver.internal.core.cql.CqlPrepareHandler.lambda$scheduleTimeout$1(CqlPrepareHandler.java:163) ~[java-driver-core-4.13.0.jar!/:na]
    at io.netty.util.HashedWheelTimer$HashedWheelTimeout.run(HashedWheelTimer.java:715) ~[netty-common-4.1.74.Final.jar!/:4.1.74.Final]
    at io.netty.util.concurrent.ImmediateExecutor.execute(ImmediateExecutor.java:34) ~[netty-common-4.1.74.Final.jar!/:4.1.74.Final]
    at io.netty.util.HashedWheelTimer$HashedWheelTimeout.expire(HashedWheelTimer.java:703) ~[netty-common-4.1.74.Final.jar!/:4.1.74.Final]
    at io.netty.util.HashedWheelTimer$HashedWheelBucket.expireTimeouts(HashedWheelTimer.java:790) ~[netty-common-4.1.74.Final.jar!/:4.1.74.Final]
    at io.netty.util.HashedWheelTimer$Worker.run(HashedWheelTimer.java:503) ~[netty-common-4.1.74.Final.jar!/:4.1.74.Final]
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.74.Final.jar!/:4.1.74.Final]
    at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na]

```