I am trying to migrate from Spring Boot 2.7 application with Hazelcast 4.2 to Spring Boot 3.2 and Hazelcast 5.3, which also includes JCache Hazelcast provider.

In previous version I was using WebFilter from Hazelcast (https://github.com/hazelcast/hazelcast-wm/blob/master/src/main/java/com/hazelcast/web/WebFilter.java) registered with FilterRegistrationBean, but it is not prepared for Spring Boot 3 bacause of the lack of jakarta imports.

Because of that I wanted to use Spring Session Hazelcast configuration, but after making request to application I am getting this stacktrace:

com.hazelcast.nio.serialization.HazelcastSerializationException: java.lang.ClassNotFoundException: org.springframework.session.hazelcast.SessionUpdateEntryProcessor
    at com.hazelcast.internal.serialization.impl.defaultserializers.JavaDefaultSerializers$JavaSerializer.read(JavaDefaultSerializers.java:96)
    at com.hazelcast.internal.serialization.impl.defaultserializers.JavaDefaultSerializers$JavaSerializer.read(JavaDefaultSerializers.java:85)
    at com.hazelcast.internal.serialization.impl.StreamSerializerAdapter.read(StreamSerializerAdapter.java:44)
    at com.hazelcast.internal.serialization.impl.AbstractSerializationService.toObject(AbstractSerializationService.java:271)
    at com.hazelcast.client.impl.protocol.task.map.MapExecuteOnKeyMessageTask.prepareOperation(MapExecuteOnKeyMessageTask.java:42)
    at com.hazelcast.client.impl.protocol.task.AbstractPartitionMessageTask.processInternal(AbstractPartitionMessageTask.java:45)
    at com.hazelcast.client.impl.protocol.task.AbstractAsyncMessageTask.processMessage(AbstractAsyncMessageTask.java:71)
    at (...) com.hazelcast.internal.util.executor.HazelcastManagedThread.run(HazelcastManagedThread.java:111)
    at ------ submitted from ------.()
    at com.hazelcast.internal.util.ExceptionUtil.cloneExceptionWithFixedAsyncStackTrace(ExceptionUtil.java:348)
    at com.hazelcast.spi.impl.operationservice.impl.InvocationFuture.returnOrThrowWithGetConventions(InvocationFuture.java:112)
(...)
org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
    at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.lang.ClassNotFoundException: org.springframework.session.hazelcast.SessionUpdateEntryProcessor
    at jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
(...)
com.hazelcast.internal.nio.IOUtil$ClassLoaderAwareObjectInputStream.resolveClass(IOUtil.java:999)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:2003)
(...)
com.hazelcast.internal.serialization.impl.defaultserializers.JavaDefaultSerializers$JavaSerializer.read(JavaDefaultSerializers.java:92)
    at com.hazelcast.internal.serialization.impl.defaultserializers.JavaDefaultSerializers$JavaSerializer.read(JavaDefaultSerializers.java:85)
    at com.hazelcast.internal.serialization.impl.StreamSerializerAdapter.read(StreamSerializerAdapter.java:44)
    at com.hazelcast.internal.serialization.impl.AbstractSerializationService.toObject(AbstractSerializationService.java:271)
(...)
    at com.hazelcast.internal.util.executor.HazelcastManagedThread.run(HazelcastManagedThread.java:111)

I get this error after following this documentantion, but I’m not sure if I adjusted this in a right way (using JCache etc.): https://docs.spring.io/spring-session/reference/3.2/http-session.html#httpsession-hazelcast
There is also some information on Hazelcast but it lacks changes for new versions: https://docs.hazelcast.com/tutorials/spring-session-hazelcast

My configuration and code (using Spring Boot 3.2.6, Hazelcast 5.3.7 client, hazelcast 5.3.7 default server running in docker-compose):
docker-compose.yml

version: "3"
services:
  hazelcast:
    image: hazelcast/hazelcast:5.3.7-slim
    ports:
    - "5701:5701"

pom.xml

org.springframework.boot:spring-boot-starter-web-3.2.6
org.springframework.boot:spring-boot-starter-cache-3.2.6
org.springframework.session:spring-session-core-3.2.3
org.springframework.session:spring-session-hazelcast-3.2.3
javax.cache:cache-api-1.1.1
com.hazelcast:hazelcast-spring-5.3.7
com.hazelcast:hazelcast-5.3.7

application.yml

spring:
  cache:
    type: jcache
    jcache:
      provider: com.hazelcast.client.cache.HazelcastClientCachingProvider
  hazelcast:
    config: classpath:hazelcast-client.xml

hazelcast-client.xml

<hazelcast-client xmlns="http://www.hazelcast.com/schema/client-config"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xsi:schemaLocation="http://www.hazelcast.com/schema/client-config
                  http://www.hazelcast.com/schema/client-config/hazelcast-client-config-5.3.xsd">

    <cluster-name>dev</cluster-name>

    <instance-name>hazelcast-client</instance-name>
    
    <network>
        <cluster-members>
            <address>localhost:5701</address>
        </cluster-members>
    </network>

</hazelcast-client>

HazelcastSessionConfiguration.kt

@EnableHazelcastHttpSession
@Configuration
open class HazelcastSessionConfiguration {
    @Bean
    open fun hazelcastConfig(): Config {
        val config = Config()
        val attributeConfig = AttributeConfig()
            .setName(HazelcastIndexedSessionRepository.PRINCIPAL_NAME_ATTRIBUTE)
            .setExtractorClassName(PrincipalNameExtractor::class.java.name)
        config.getMapConfig(HazelcastIndexedSessionRepository.DEFAULT_SESSION_MAP_NAME)
            .addAttributeConfig(attributeConfig)
            .addIndexConfig(
                IndexConfig(IndexType.HASH, HazelcastIndexedSessionRepository.PRINCIPAL_NAME_ATTRIBUTE)
            )
        config.setClusterName("dev")
        config.networkConfig.setPublicAddress("localhost:5701")
        val serializerConfig = SerializerConfig()
        serializerConfig.setImplementation(HazelcastSessionSerializer()).setTypeClass(MapSession::class.java)
        config.serializationConfig.addSerializerConfig(serializerConfig)
        return config
    }

}

I tried different configurations, with and without “hazelcastConfig” bean, changing hazelcast to 5.4 and 4.2, or creating “hazelcastIntance” bean but then I get other error:

Caused by: javax.cache.CacheException: Error opening URI [hazelcast]
    at com.hazelcast.cache.impl.AbstractHazelcastCachingProvider.getCacheManager(AbstractHazelcastCachingProvider.java:132)
    at com.hazelcast.client.cache.HazelcastClientCachingProvider.getCacheManager(HazelcastClientCachingProvider.java:63)
(...)
Caused by: java.lang.ClassCastException: class com.hazelcast.instance.impl.HazelcastInstanceProxy cannot be cast to class com.hazelcast.client.impl.clientside.HazelcastClientInstanceImpl (com.hazelcast.instance.impl.HazelcastInstanceProxy and com.hazelcast.client.impl.clientside.HazelcastClientInstanceImpl are in unnamed module of loader 'app')
    at com.hazelcast.client.cache.impl.HazelcastClientCacheManager.<init>(HazelcastClientCacheManager.java:69)

What am I missing here? Any help will be appreciated