io.github.bucket4j.grid.hazelcast.HazelcastEntryProcessor java.lang.ClassNotFoundException

[raghu298]

getting above error and i have below dependencies.

@vladimir-bukhtoyarov could you please suggest what i am missing

<dependency>
		    <groupId>com.bucket4j</groupId>
		    <artifactId>bucket4j-core</artifactId>
		    <version>8.3.0</version>
		</dependency>
		<dependency>
		    <groupId>com.bucket4j</groupId>
		    <artifactId>bucket4j-hazelcast</artifactId>
		    <version>8.3.0</version>
		</dependency>
		<dependency>
			<groupId>com.hazelcast</groupId>
			<artifactId>hazelcast-spring</artifactId>
		</dependency>
		<dependency>
			<groupId>javax.cache</groupId>
			<artifactId>cache-api</artifactId>
		</dependency>

[raghu298]

@vladimir-bukhtoyarov : below is the stacktrace

java.lang.ClassNotFoundException: io.github.bucket4j.grid.hazelcast.HazelcastEntryProcessor
	at jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) ~[na:na]
	at jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[na:na]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[na:na]
	at com.hazelcast.internal.nio.ClassLoaderUtil.tryLoadClass(ClassLoaderUtil.java:301) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.internal.nio.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:259) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.internal.nio.IOUtil$ClassLoaderAwareObjectInputStream.resolveClass(IOUtil.java:999) ~[hazelcast-5.2.3.jar:5.2.3]
	at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:2003) ~[na:na]
	at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1870) ~[na:na]
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2201) ~[na:na]
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1687) ~[na:na]
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:489) ~[na:na]
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:447) ~[na:na]
	at com.hazelcast.internal.serialization.impl.defaultserializers.JavaDefaultSerializers$JavaSerializer.read(JavaDefaultSerializers.java:92) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.internal.serialization.impl.defaultserializers.JavaDefaultSerializers$JavaSerializer.read(JavaDefaultSerializers.java:85) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.internal.serialization.impl.StreamSerializerAdapter.read(StreamSerializerAdapter.java:44) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.internal.serialization.impl.AbstractSerializationService.toObject(AbstractSerializationService.java:271) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.client.impl.protocol.task.map.MapExecuteOnKeyMessageTask.prepareOperation(MapExecuteOnKeyMessageTask.java:42) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.client.impl.protocol.task.AbstractPartitionMessageTask.processInternal(AbstractPartitionMessageTask.java:45) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.client.impl.protocol.task.AbstractAsyncMessageTask.processMessage(AbstractAsyncMessageTask.java:71) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.client.impl.protocol.task.AbstractMessageTask.initializeAndProcessMessage(AbstractMessageTask.java:169) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.client.impl.protocol.task.AbstractMessageTask.run(AbstractMessageTask.java:132) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.spi.impl.operationservice.impl.OperationRunnerImpl.run(OperationRunnerImpl.java:198) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.spi.impl.operationexecutor.impl.OperationThread.process(OperationThread.java:212) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.spi.impl.operationexecutor.impl.OperationThread.process(OperationThread.java:146) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.spi.impl.operationexecutor.impl.OperationThread.loop(OperationThread.java:134) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.spi.impl.operationexecutor.impl.OperationThread.executeRun(OperationThread.java:115) ~[hazelcast-5.2.3.jar:5.2.3]
	at com.hazelcast.internal.util.executor.HazelcastManagedThread.run(HazelcastManagedThread.java:111) ~[hazelcast-5.2.3.jar:5.2.3]

[vladimir-bukhtoyarov]

Exception explicitly tells that remote node is unable to deserialize the instance of io.github.bucket4j.grid.hazelcast.HazelcastEntryProcessor. You need to check that bucket4j-core and bucket4j-hazelcast jars are present in classpath on each node in the Hazelcast cluster.

[raghu298]

@vladimir-bukhtoyarov Not sure but its got resolved after using HazelcastLockBasedProxyManager.
i am running hazelcast locally : https://docs.hazelcast.com/tutorials/kubernetes-external-client

[vladimir-bukhtoyarov]

HazelcastLockBasedProxyManager is created especially for cases when user cannot change class path of nodes in cluster, but pay attention that it is about two times slower than HaselcastProxyManager(based on EntryProcessr), do not give up so fast, fixing class path has performance benefits.