[jira] [Created] (KAFKA-16398) mirror-maker2 running into OOM while filtering high number of messages

["Srivignesh (Jira)" <ji...@apache.org>]

Srivignesh created KAFKA-16398:
----------------------------------

             Summary: mirror-maker2 running into OOM while filtering high number of messages
                 Key: KAFKA-16398
                 URL: https://issues.apache.org/jira/browse/KAFKA-16398
             Project: Kafka
          Issue Type: Bug
          Components: connect, mirrormaker
    Affects Versions: 3.6.1
            Reporter: Srivignesh


Based on custom predicate, our application is filtering messages during mirroring. 

When the HasHeader:test method of the predicate returns false (when it has to drop messages from mirroring), it encounters below exceptions. 

However when it returns true (the messages are forwarded for mirroring), it works fine without OOM. 

Note: This issue doesn't occur in version 2.8.0.

Exception stacktraces:
{code:java}
line java.lang.OutOfMemoryError: Java heap space
line     at org.apache.kafka.common.utils.Utils.toArray(Utils.java:289)
line     at org.apache.kafka.common.utils.Utils.toArray(Utils.java:252)
line     at org.apache.kafka.common.utils.Utils.toNullableArray(Utils.java:270)
line     at org.apache.kafka.common.serialization.Deserializer.deserialize(Deserializer.java:73)
line     at org.apache.kafka.clients.consumer.internals.CompletedFetch.parseRecord(CompletedFetch.java:300)
line     at org.apache.kafka.clients.consumer.internals.CompletedFetch.fetchRecords(CompletedFetch.java:263)
line     at org.apache.kafka.clients.consumer.internals.AbstractFetch.fetchRecords(AbstractFetch.java:340)
line     at org.apache.kafka.clients.consumer.internals.AbstractFetch.collectFetch(AbstractFetch.java:306)
line     at org.apache.kafka.clients.consumer.KafkaConsumer.pollForFetches(KafkaConsumer.java:1262)
line     at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1186)
line     at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1159)
line     at org.apache.kafka.connect.mirror.MirrorSourceTask.poll(MirrorSourceTask.java:153)
line     at org.apache.kafka.connect.runtime.AbstractWorkerSourceTask.poll(AbstractWorkerSourceTask.java:469)
line     at org.apache.kafka.connect.runtime.AbstractWorkerSourceTask.execute(AbstractWorkerSourceTask.java:357)
line     at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:204)
line     at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:259)
line     at org.apache.kafka.connect.runtime.AbstractWorkerSourceTask.run(AbstractWorkerSourceTask.java:77)
line     at org.apache.kafka.connect.runtime.isolation.Plugins.lambda$withClassLoader$1(Plugins.java:236)
line     at org.apache.kafka.connect.runtime.isolation.Plugins$$Lambda$841/0x00007f55cc4c3d78.run(Unknown Source)
line     at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
line     at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
line     at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
line     at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
line     at java.base/java.lang.Thread.run(Thread.java:840) {code}
{code:java}
line java.lang.OutOfMemoryError: Java heap space line     at java.base/java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:64)
{code}



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