[FLINK-3338] Kafka deserialization issue - ClassNotFoundException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Assignee: Stephan Ewen
• Reporter: Shikhar Bhushan
• Created: 04/Feb/16 18:13
• Updated: 05/Feb/16 13:09
• Resolved: 05/Feb/16 13:09

Description

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.

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)

till.rohrmann this seems related to your recent change via FLINK-3313? I don't understand why it would happen though.