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Posted to issues@flink.apache.org by "Stefan Richter (Jira)" <ji...@apache.org> on 2024/03/15 09:32:00 UTC

[jira] [Created] (FLINK-34693) Memory leak in KafkaWriter

Stefan Richter created FLINK-34693:
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             Summary: Memory leak in KafkaWriter
                 Key: FLINK-34693
                 URL: https://issues.apache.org/jira/browse/FLINK-34693
             Project: Flink
          Issue Type: Bug
          Components: Connectors / Kafka
    Affects Versions: 1.18.1, 1.19.0, 1.18.0
            Reporter: Stefan Richter
         Attachments: image-2024-03-15-10-30-08-280.png, image-2024-03-15-10-30-50-902.png

KafkaWriter is keeping instances of {{TwoPhaseCommitProducer}} in Dequeue of closeables ({{{}producerCloseables{}}}). We are only adding instances to the queue (for each txn?), but never remove them so that the can be GC’ed.

From heap dump:

!image-2024-03-15-10-30-50-902.png!
!04599375-f923-4d1a-8d68-9e17e54b363c#media-blob-url=true&id=9d1e022e-8762-45b3-877b-d298ec956078&collection=&contextId=870337&height=306&width=2284&alt=!!image-2024-03-15-10-30-08-280.png!!image-2024-03-15-10-28-48-591.png!



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