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https://issues.apache.org/jira/browse/CAMEL-17947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17521052#comment-17521052
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Otavio Rodolfo Piske commented on CAMEL-17947:
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KafkaConsumer is not safe for multi-threaded access.
> camel-kafka: fix concurrent access in camel-health
> --------------------------------------------------
>
> Key: CAMEL-17947
> URL: https://issues.apache.org/jira/browse/CAMEL-17947
> Project: Camel
> Issue Type: Task
> Components: camel-health, camel-kafka
> Affects Versions: 3.17.0
> Reporter: Otavio Rodolfo Piske
> Priority: Major
>
> Investigate and fix the issue below:
> {code}
> 1496 │ java.util.ConcurrentModificationException: KafkaConsumer is not safe
> for multi-threaded access
> 1497 │ at
> org.apache.kafka.clients.consumer.KafkaConsumer.acquire(KafkaConsumer.java:2469)
> ~[kafka-clients-3.1.0.jar:?]
> 1498 │ at
> org.apache.kafka.clients.consumer.KafkaConsumer.acquireAndEnsureOpen(KafkaConsumer.java:2453)
> ~[kafka-clients-3.1.0.jar:?]
> 1499 │ at
> org.apache.kafka.clients.consumer.KafkaConsumer.assignment(KafkaConsumer.java:891)
> ~[kafka-clients-3.1.0.jar:?]
> 1500 │ at
> org.apache.camel.component.kafka.KafkaFetchRecords.pause(KafkaFetchRecords.java:518)
> ~[camel-kafka-3.17.0-SNAPSHOT.jar:3.17.0-SNAPSHOT]
> 1501 │ at
> org.apache.camel.component.kafka.KafkaConsumer.doSuspend(KafkaConsumer.java:221)
> ~[camel-kafka-3.17.0-SNAPSHOT.jar:3.17.0-SNAPSHOT]
> 1502 │ at
> org.apache.camel.support.service.BaseService.suspend(BaseService.java:189)
> ~[camel-api-3.17.0-SNAPSHOT.jar:3.17.0-SNAPSHOT]
> 1503 │ at
> org.apache.camel.support.service.ServiceHelper.suspendService(ServiceHelper.java:404)
> ~[camel-api-3.17.0-SNAPSHOT.jar:3.17.0-SNAPSHOT]
> 1504 │ at
> org.apache.camel.impl.engine.DefaultShutdownStrategy.suspendNow(DefaultShutdownStrategy.java:447)
> ~[camel-base-engine-3.17.0-SNAPSHOT.jar:3.17.0-SNAPSHOT]
> 1505 │ at
> org.apache.camel.impl.engine.DefaultShutdownStrategy$ShutdownTask.run(DefaultShutdownStrategy.java:620)
> ~[camel-base-engine-3.17.0-SNAPSHOT.jar:3.17.0-SNAPSHOT]
> 1506 │ at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) ~[?:?]
> 1507 │ at java.util.concurrent.FutureTask.run(FutureTask.java:264)
> ~[?:?]
> 1508 │ at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
> ~[?:?]
> 1509 │ at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
> ~[?:?]
> 1510 │ at java.lang.Thread.run(Thread.java:833) ~[?:?]
> {code}
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