[FLINK-8752] ClassNotFoundException when using the user code class loader

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 1.4.1
• Component/s: Runtime / Coordination
• Assignee: Unassigned
• Reporter: Elias Levy
• Created: 23/Feb/18 05:13
• Updated: 28/Feb/19 14:01
• Resolved: 23/Feb/18 14:00

Description

Attempting to submit a job results in the job failing while it is being started in the JMs with a ClassNotFoundException error: 

java.lang.ClassNotFoundException: com.foo.flink.common.util.TimeAssigner
	at java.net.URLClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Unknown Source)
	at org.apache.flink.util.InstantiationUtil$ClassLoaderObjectInputStream.resolveClass(InstantiationUtil.java:73)
	at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
	at java.io.ObjectInputStream.readClassDesc(Unknown Source)
	at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
	at java.io.ObjectInputStream.readObject0(Unknown Source)
	at java.io.ObjectInputStream.readObject(Unknown Source)
	at org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:393)
	at org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:380)
	at org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:368)
	at org.apache.flink.util.SerializedValue.deserializeValue(SerializedValue.java:58)
	at org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher.createPartitionStateHolders(AbstractFetcher.java:542)
	at org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher.<init>(AbstractFetcher.java:167)
	at org.apache.flink.streaming.connectors.kafka.internal.Kafka09Fetcher.<init>(Kafka09Fetcher.java:89)
	at org.apache.flink.streaming.connectors.kafka.internal.Kafka010Fetcher.<init>(Kafka010Fetcher.java:62)
	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer010.createFetcher(FlinkKafkaConsumer010.java:203)
	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:564)
	at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:86)
	at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:55)
	at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:94)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:264)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:718)
	at java.lang.Thread.run(Unknown Source)

If I drop the job's jar into the lib folder in the JM and configure the JM to classloader.resolve-order to parent-first the job starts successfully.

Issue Links

• duplicates: FLINK-8741 KafkaFetcher09/010/011 uses wrong user code classloader