[jira] [Commented] (FLINK-3338) Kafka deserialization issue - ClassNotFoundException

["Shikhar Bhushan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-3338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15132726#comment-15132726 ] 

Shikhar Bhushan commented on FLINK-3338:
----------------------------------------

(this is on 1.0-SNAPSHOT)

> Kafka deserialization issue - ClassNotFoundException
> ----------------------------------------------------
>
>                 Key: FLINK-3338
>                 URL: https://issues.apache.org/jira/browse/FLINK-3338
>             Project: Flink
>          Issue Type: Bug
>            Reporter: Shikhar Bhushan
>
> I get this error when running a JAR submitted using the web UI on a production standalone cluster (single node, 1 TM & 1 JM), but not on a standalone cluster (1 TM & 1 JM) running on my laptop. JDK8 on both.
> {noformat}
> java.lang.ClassNotFoundException: omitted$KafkaDeserializationSchema$
> 	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> 	at java.lang.Class.forName0(Native Method)
> 	at java.lang.Class.forName(Class.java:348)
> 	at org.apache.flink.util.InstantiationUtil$ClassLoaderObjectInputStream.resolveClass(InstantiationUtil.java:62)
> 	at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1613)
> 	at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1518)
> 	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1774)
> 	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
> 	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2000)
> 	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1924)
> 	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)
> 	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
> 	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
> 	at org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:288)
> 	at org.apache.flink.util.InstantiationUtil.clone(InstantiationUtil.java:314)
> 	at org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher.run(LegacyFetcher.java:203)
> 	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer08.run(FlinkKafkaConsumer08.java:307)
> 	at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:58)
> 	at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:55)
> 	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:218)
> 	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:562)
> 	at java.lang.Thread.run(Thread.java:745)
> {noformat}
> [~till.rohrmann] this seems related to your recent change? I don't understand why it would happen though.



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