[jira] [Comment Edited] (FLINK-16262) Class loader problem with FlinkKafkaProducer.Semantic.EXACTLY_ONCE and usrlib directory

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

    [ https://issues.apache.org/jira/browse/FLINK-16262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17045377#comment-17045377 ] 

Guowei Ma edited comment on FLINK-16262 at 2/26/20 11:30 AM:
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Hi, [~jkreileder] could you provide the version of Kafka connector and the files in the lib and usrlib directories?


was (Author: maguowei):
Hi, [~jkreileder] could you provide the version of Kafka connector?

> Class loader problem with FlinkKafkaProducer.Semantic.EXACTLY_ONCE and usrlib directory
> ---------------------------------------------------------------------------------------
>
>                 Key: FLINK-16262
>                 URL: https://issues.apache.org/jira/browse/FLINK-16262
>             Project: Flink
>          Issue Type: Bug
>          Components: Connectors / Kafka, Deployment / Docker
>    Affects Versions: 1.10.0
>         Environment: openjdk:11-jre with a slightly modified Flink 1.10.0 build (nothing changed regarding Kafka and/or class loading).
>            Reporter: Jürgen Kreileder
>            Priority: Blocker
>             Fix For: 1.10.1, 1.11.0
>
>
> We're using Docker images modeled after [https://github.com/apache/flink/blob/master/flink-container/docker/Dockerfile] (using Java 11)
> When I try to switch a Kafka producer from AT_LEAST_ONCE to EXACTLY_ONCE, the taskmanager startup fails with:
> {code:java}
> 2020-02-24 18:25:16.389 INFO  o.a.f.r.t.Task                           Create Case Fixer -> Sink: Findings local-krei04-kba-digitalweb-uc1 (1/1) (72f7764c6f6c614e5355562ed3d27209) switched from RUNNING to FAILED.
> org.apache.kafka.common.config.ConfigException: Invalid value org.apache.kafka.common.serialization.ByteArraySerializer for configuration key.serializer: Class org.apache.kafka.common.serialization.ByteArraySerializer could not be found.
>  at org.apache.kafka.common.config.ConfigDef.parseType(ConfigDef.java:718)
>  at org.apache.kafka.common.config.ConfigDef.parseValue(ConfigDef.java:471)
>  at org.apache.kafka.common.config.ConfigDef.parse(ConfigDef.java:464)
>  at org.apache.kafka.common.config.AbstractConfig.<init>(AbstractConfig.java:62)
>  at org.apache.kafka.common.config.AbstractConfig.<init>(AbstractConfig.java:75)
>  at org.apache.kafka.clients.producer.ProducerConfig.<init>(ProducerConfig.java:396)
>  at org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:326)
>  at org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:298)
>  at org.apache.flink.streaming.connectors.kafka.internal.FlinkKafkaInternalProducer.<init>(FlinkKafkaInternalProducer.java:76)
>  at org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer.lambda$abortTransactions$2(FlinkKafkaProducer.java:1107)
>  at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(Unknown Source)
>  at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(Unknown Source)
>  at java.base/java.util.stream.AbstractPipeline.copyInto(Unknown Source)
>  at java.base/java.util.stream.ForEachOps$ForEachTask.compute(Unknown Source)
>  at java.base/java.util.concurrent.CountedCompleter.exec(Unknown Source)
>  at java.base/java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
>  at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source)
>  at java.base/java.util.concurrent.ForkJoinPool.scan(Unknown Source)
>  at java.base/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
>  at java.base/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source){code}
> This looks like a class loading issue: If I copy our JAR to FLINK_LIB_DIR instead of FLINK_USR_LIB_DIR, everything works fine.
> (AT_LEAST_ONCE producers works fine with the JAR in FLINK_USR_LIB_DIR)
>  



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