Hi,
I'm trying to load a FlinkKafkaProducer sink alongside another custom sink.
While trying to restore
a running Flink app from the previous state, I get the error message below.
I am running Flink 1.9.0 with the following SBT dependency added:
"org.apache.flink" %% "flink-connector-kafka" % 1.9.0
And the app is deployed via a standard uber jar with all the dependencies. W
Would appreciate the help
java.lang.LinkageError: loader constraint violation: loader (instance of
org/apache/flink/util/ChildFirstClassLoader) previously initiated loading
for a different type with name
"org/apache/kafka/clients/producer/ProducerRecord"
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:
142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
at org.apache.flink.util.ChildFirstClassLoader.loadClass(
ChildFirstClassLoader.java:66)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.getDeclaredMethod(Class.java:2128)
at java.io.ObjectStreamClass.getPrivateMethod(ObjectStreamClass.java:
1629)
at java.io.ObjectStreamClass.access$1700(ObjectStreamClass.java:79)
at java.io.ObjectStreamClass$3.run(ObjectStreamClass.java:520)
at java.io.ObjectStreamClass$3.run(ObjectStreamClass.java:494)
at java.security.AccessController.doPrivileged(Native Method)
at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:494)
at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:391)
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:681)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:
1885)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1751)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:
2042)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1573)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:
2287)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:
561)
at org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer
.readObject(FlinkKafkaProducer.java:1202)
at sun.reflect.GeneratedMethodAccessor358.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(
DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:
1170)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2178)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:
2069)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1573)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:
2287)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2211)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:
2069)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1573)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:
2287)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2211)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:
2069)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1573)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:431)
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:235)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createChainedOperator(OperatorChain.java:427)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createOutputCollector(OperatorChain.java:354)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createChainedOperator(OperatorChain.java:418)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createOutputCollector(OperatorChain.java:354)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createChainedOperator(OperatorChain.java:418)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createOutputCollector(OperatorChain.java:354)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createChainedOperator(OperatorChain.java:418)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createOutputCollector(OperatorChain.java:354)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createChainedOperator(OperatorChain.java:418)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createOutputCollector(OperatorChain.java:354)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createChainedOperator(OperatorChain.java:418)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createOutputCollector(OperatorChain.java:354)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createChainedOperator(OperatorChain.java:418)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createOutputCollector(OperatorChain.java:354)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createChainedOperator(OperatorChain.java:418)
at org.apache.flink.streaming.runtime.tasks.OperatorChain
.createOutputCollector(OperatorChain.java:354)
at org.apache.flink.streaming.runtime.tasks.OperatorChain.<init>(
OperatorChain.java:144)
at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask
.java:370)
at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:705)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:530)
at java.lang.Thread.run(Thread.java:748)
--
Best Regards,
Yuval Itzchakov.
