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  1. Kafka
  2. KAFKA-9186

Kafka Connect floods logs with probably bogus error messages from DelegatingClassLoader

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Minor
    • Resolution: Unresolved
    • Affects Version/s: 2.3.1
    • Fix Version/s: None
    • Component/s: KafkaConnect
    • Labels:
      None

      Description

      After upgrading Kafka Connect from 2.3.0 to 2.3.1 we discovered a lot of recurring ERROR messages in Connect's logs.

      Plugin class loader for connector: 'com.google.pubsub.kafka.sink.CloudPubSubSinkConnector' was not found. Returning: org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader@58f437b0
      logger: org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader
      
      

      Kafka Connect continues processing the topics as it should be.

      We are not using plugin classloader isolation feature by not specifying plugin.path property because we were seeing classloading deadlocks similar to ones described in KAFKA-7421

      Maybe the level of this message should be lowered?

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            • Assignee:
              Unassigned
              Reporter:
              piter Piotr Szczepanik
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              Dates

              • Created:
                Updated: