In order to make your issue reports as actionable as possible, please provide the following information, depending on the issue type.

Bug report

For bug reports, provide this information, please:

What Debezium connector do you use and what version?

Oracle, any version

What behavior do you expect?

Clear message indicationg the issue

What behavior do you see?

Misleading error message

Do you see the same behavior using the latest released Debezium version?

Yes

Do you have the connector logs, ideally from start till finish?

Yes

How to reproduce the issue using our tutorial deployment?

Define property without port like that:
debezium.sink.redis.address=localhost
Should be like that:
debezium.sink.redis.address=<host>:<port>

Feature request or enhancement

For feature requests or enhancements, provide this information, please:

Which use case/requirement will be addressed by the proposed feature?

Yes

The error is:
Failed to start application (with profile [prod]): java.lang.RuntimeException: Failed to start quarkus
        at io.quarkus.runner.ApplicationImpl.doStart(Unknown Source)
        at io.quarkus.runtime.Application.start(Application.java:101)
        at io.quarkus.runtime.ApplicationLifecycleManager.run(ApplicationLifecycleManager.java:111)
        at io.quarkus.runtime.Quarkus.run(Quarkus.java:71)
        at io.quarkus.runtime.Quarkus.run(Quarkus.java:44)
        at io.quarkus.runtime.Quarkus.run(Quarkus.java:124)
        at io.debezium.server.Main.main(Main.java:15)
Caused by: java.lang.StringIndexOutOfBoundsException: begin 0, end -1, length 9
        at java.base/java.lang.String.checkBoundsBeginEnd(String.java:3319)
        at java.base/java.lang.String.substring(String.java:1874)
        at redis.clients.jedis.HostAndPort.from(HostAndPort.java:58)
        at io.debezium.storage.redis.RedisConnection.getRedisClient(RedisConnection.java:72)
        at io.debezium.server.redis.RedisStreamChangeConsumer.connect(RedisStreamChangeConsumer.java:101)
        at io.debezium.server.redis.RedisStreamChangeConsumer_Bean.doCreate(Unknown Source)
        at io.debezium.server.redis.RedisStreamChangeConsumer_Bean.create(Unknown Source)
        at io.debezium.server.redis.RedisStreamChangeConsumer_Bean.create(Unknown Source)
        at io.debezium.server.DebeziumServer.start(DebeziumServer.java:129)
        at io.debezium.server.DebeziumServer_Bean.doCreate(Unknown Source)
        at io.debezium.server.DebeziumServer_Bean.create(Unknown Source)
        at io.debezium.server.DebeziumServer_Bean.create(Unknown Source)
        at io.quarkus.arc.impl.AbstractSharedContext.createInstanceHandle(AbstractSharedContext.java:113)
        at io.quarkus.arc.impl.AbstractSharedContext$1.get(AbstractSharedContext.java:37)
        at io.quarkus.arc.impl.AbstractSharedContext$1.get(AbstractSharedContext.java:34)
        at io.quarkus.arc.impl.LazyValue.get(LazyValue.java:26)
        at io.quarkus.arc.impl.ComputingCache.computeIfAbsent(ComputingCache.java:69)
        at io.quarkus.arc.impl.AbstractSharedContext.get(AbstractSharedContext.java:34)
        at io.quarkus.arc.impl.ClientProxies.getApplicationScopedDelegate(ClientProxies.java:21)
        at io.debezium.server.DebeziumServer_ClientProxy.arc$delegate(Unknown Source)
        at io.debezium.server.DebeziumServer_ClientProxy.arc_contextualInstance(Unknown Source)
        at io.debezium.server.DebeziumServer_Observer_Synthetic_f28a48f6bdce4326db44aec92fdb5c84d535b5d9.notify(Unknown Source)
        at io.quarkus.arc.impl.EventImpl$Notifier.notifyObservers(EventImpl.java:346)
        at io.quarkus.arc.impl.EventImpl$Notifier.notify(EventImpl.java:328)
        at io.quarkus.arc.impl.EventImpl.fire(EventImpl.java:82)
        at io.quarkus.arc.runtime.ArcRecorder.fireLifecycleEvent(ArcRecorder.java:155)
        at io.quarkus.arc.runtime.ArcRecorder.handleLifecycleEvents(ArcRecorder.java:106)
        at io.quarkus.deployment.steps.LifecycleEventsBuildStep$startupEvent1144526294.deploy_0(Unknown Source)
        at io.quarkus.deployment.steps.LifecycleEventsBuildStep$startupEvent1144526294.deploy(Unknown Source)
        ... 7 more