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?

2.7.0.Beta1

What is the connector configuration?

 

What is the captured database version and mode of depoyment?

AWS RDS Oracle 

 

What behaviour do you expect?

ju

 

What behaviour do you see?

matchedByPattern consume 780% of 8 core cpu. 

 

```
"debezium-oracleconnector-ORANCP-change-event-source-coordinator" #57 prio=5 os_prio=0 cpu=386130.10ms elapsed=2479.32s tid=0x00007f73e83c7000 nid=0x4af5 runnable  [0x00007f748a6ec000]
   java.lang.Thread.State: RUNNABLE
at java.util.regex.Pattern$SliceI.match(java.base@11.0.22/Pattern.java:4140)
at java.util.regex.Matcher.match(java.base@11.0.22/Matcher.java:1756)
at java.util.regex.Matcher.matches(java.base@11.0.22/Matcher.java:713)
at io.debezium.function.Predicates.lambda$matchedByPattern$6(Predicates.java:265)
at io.debezium.function.Predicates$$Lambda$921/0x000000080078d040.apply(Unknown Source)
at io.debezium.function.Predicates.lambda$includedInPatterns$4(Predicates.java:240)
at io.debezium.function.Predicates$$Lambda$907/0x0000000800788040.test(Unknown Source)
at io.debezium.relational.Selectors$TableSelectionPredicateBuilder.lambda$buildStartingFromSchemaFilter$3(Selectors.java:308)
at io.debezium.relational.Selectors$TableSelectionPredicateBuilder$$Lambda$919/0x000000080078d840.test(Unknown Source)
at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:281)
at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.pollNoWakeup(ConsumerNetworkClient.java:322)
at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:526)
at org.apache.kafka.clients.consumer.internals.LegacyKafkaConsumer.updateAssignmentMetadataIfNeeded(LegacyKafkaConsumer.java:651)
at org.apache.kafka.clients.consumer.internals.LegacyKafkaConsumer.poll(LegacyKafkaConsumer.java:612)
at org.apache.kafka.clients.consumer.internals.LegacyKafkaConsumer.poll(LegacyKafkaConsumer.java:585)
at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:827)
 

```

Do you see the same behaviour using the latest relesead Debezium version?

(Ideally, also verify with latest Alpha/Beta/CR version)

I use 2.7.0 Beta1

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

(You might be asked later to provide DEBUG/TRACE level log)

 

no log 

 

 

 

How to reproduce the issue using our tutorial deployment?

<Your answer>

Feature request or enhancement

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

 

I modify Predicates.java 

```
protected static <T> Function<T, Optional<Pattern>> matchedByPattern(Collection<Pattern> patterns, Function<T, String> conversion) {
return (t) -> {
String str = conversion.apply(t);
if (str != null) {
for (Pattern p : patterns) {
// System.out.println("str: " + str + ", p: " + p.pattern() + ", matches: " + p.matcher(str).matches());
if (p.pattern().equals(str))

{ return Optional.of(p); }

// if (p.matcher(str).matches())

{ // return Optional.of(p); // }

}
}
return Optional.empty();
};
}
```
 
And it work well. 
 

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

<Your answer>

Implementation ideas (optional)

<Your answer>