flink任务启动报错 Cannot instantiate user function

hi all:
flink 启动报错，调整了配置classloader.resolve-order: parent-first 也没用效果，请问该问题如何排查？
2020-10-25 22:14:00
org.apache.flink.streaming.runtime.tasks.StreamTaskException: Cannot instantiate user function.
    at org.apache.flink.streaming.api.graph.StreamConfig.getStreamOperatorFactory(StreamConfig.java:269)
    at org.apache.flink.streaming.runtime.tasks.OperatorChain.createChainedOperator(OperatorChain.java:430)
    at org.apache.flink.streaming.runtime.tasks.OperatorChain.createOutputCollector(OperatorChain.java:353)
    at org.apache.flink.streaming.runtime.tasks.OperatorChain.<init>(OperatorChain.java:144)
    at org.apache.flink.streaming.runtime.tasks.StreamTask.beforeInvoke(StreamTask.java:432)
    at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:460)
    at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:708)
    at org.apache.flink.runtime.taskmanager.Task.run(Task.java:533)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.InvalidClassException: org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer011; class invalid for deserialization
    at java.io.ObjectStreamClass$ExceptionInfo.newInvalidClassException(ObjectStreamClass.java:150)
    at java.io.ObjectStreamClass.checkDeserialize(ObjectStreamClass.java:790)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1782)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353)
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353)
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2018)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1942)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1808)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373)
    at org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:576)
    at org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:562)
    at org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:550)
    at org.apache.flink.util.InstantiationUtil.readObjectFromConfig(InstantiationUtil.java:511)
    at org.apache.flink.streaming.api.graph.StreamConfig.getStreamOperatorFactory(StreamConfig.java:254)
    ... 8 more




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