Error while unsubscribing the Kafka consumer: java.util.ConcurrentModificationException: KafkaConsumer is not safe for multi-threaded access. currentThread

### Search before asking

- [x] I had searched in the [issues](https://github.com/apache/eventmesh/issues?q=is%3Aissue) and found no similar issues.

### Environment

Linux

### EventMesh version

master

### What happened

v1.11.0 eventMesh.storage.plugin.type插件为kafka，在EventMeshTCPClient eventMeshClient.close() 消费客户端关闭时，报kafka异常

### How to reproduce

@PostConstruct
public void startListener() {
try {
UserAgent userAgent = MessageUtils.generateSubClient(EventMeshUtils.buildUserAgent(eventMeshConfig, Integer.parseInt(RandomUtil.randomNumbers(5)), eventMeshConfig.getClient().getConsumerGroup()));
EventMeshTCPClientConfig config = EventMeshTCPClientConfig.builder()
.host(eventMeshConfig.getServer().getHost())
.port(eventMeshConfig.getServer().getTcpPort())
.userAgent(userAgent)
.build();
eventMeshClient = EventMeshTCPClientFactory.createEventMeshTCPClient(config, EventMeshMessage.class);
eventMeshClient.init();
// 为每个主题单独订阅
List topicList = Arrays.asList(eventMeshConfig.getClient().getTopics().split(","));
for (String topic : topicList) {
String trimmedTopic = topic.trim();
if (!trimmedTopic.isEmpty()) {
eventMeshClient.subscribe(trimmedTopic, SubscriptionMode.CLUSTERING, SubscriptionType.ASYNC);
log.info("Subscribed to topic: {}", trimmedTopic);
}
}
eventMeshClient.registerSubBusiHandler(this::processMessage);
eventMeshClient.listen();
} catch (Exception e) {
log.error("Failed to start EventMesh TCP listener", e);
}
}

@PreDestroy
public void stopListener() {
try {
if (eventMeshClient != null) {
try {
// 再关闭客户端
eventMeshClient.close();
log.info("EventMesh TCP Listener stopped successfully");
} catch (Exception e) {
log.warn("Error during close: {}", e.getMessage());
}
}
} catch (Exception e) {
log.error("Error stopping EventMesh TCP listener", e);
}
}

关闭客户端时报异常

### Debug logs

```Java
2025-10-11 17:15:52,628 ERROR [eventMesh-tcp-worker-2] ConsumerImpl(ConsumerImpl.java:126) - Error while unsubscribing the Kafka consumer:
java.util.ConcurrentModificationException: KafkaConsumer is not safe for multi-threaded access. currentThread(name: eventMesh-tcp-worker-2, id: 50) otherThread(id: 55)
at org.apache.kafka.clients.consumer.internals.ClassicKafkaConsumer.acquire(ClassicKafkaConsumer.java:1232) ~[kafka-clients-3.9.0.jar:?]
at org.apache.kafka.clients.consumer.internals.ClassicKafkaConsumer.acquireAndEnsureOpen(ClassicKafkaConsumer.java:1213) ~[kafka-clients-3.9.0.jar:?]
at org.apache.kafka.clients.consumer.internals.ClassicKafkaConsumer.unsubscribe(ClassicKafkaConsumer.java:544) ~[kafka-clients-3.9.0.jar:?]
at org.apache.kafka.clients.consumer.KafkaConsumer.unsubscribe(KafkaConsumer.java:764) ~[kafka-clients-3.9.0.jar:?]
at org.apache.eventmesh.storage.kafka.consumer.ConsumerImpl.unsubscribe(ConsumerImpl.java:121) [eventmesh-storage-kafka-1.11.0-release.jar:1.11.0-release]
at org.apache.eventmesh.storage.kafka.consumer.KafkaConsumerImpl.unsubscribe(KafkaConsumerImpl.java:81) [eventmesh-storage-kafka-1.11.0-release.jar:1.11.0-release]
at org.apache.eventmesh.runtime.core.plugin.MQConsumerWrapper.unsubscribe(MQConsumerWrapper.java:50) [eventmesh-runtime-1.11.0-release.jar:1.11.0-release]
at org.apache.eventmesh.runtime.core.protocol.tcp.client.group.ClientGroupWrapper.unsubscribe(ClientGroupWrapper.java:623) [eventmesh-runtime-1.11.0-release.jar:1.11.0-r
elease]
at org.apache.eventmesh.runtime.core.protocol.tcp.client.group.ClientSessionGroupMapping.cleanSubscriptionInSession(ClientSessionGroupMapping.java:304) [eventmesh-runtim
e-1.11.0-release.jar:1.11.0-release]
at org.apache.eventmesh.runtime.core.protocol.tcp.client.group.ClientSessionGroupMapping.cleanClientGroupWrapperByCloseSub(ClientSessionGroupMapping.java:281) [eventmesh
-runtime-1.11.0-release.jar:1.11.0-release]
at org.apache.eventmesh.runtime.core.protocol.tcp.client.group.ClientSessionGroupMapping.closeSession(ClientSessionGroupMapping.java:175) [eventmesh-runtime-1.11.0-relea
se.jar:1.11.0-release]
at org.apache.eventmesh.runtime.core.protocol.tcp.client.group.ClientSessionGroupMapping.closeSession(ClientSessionGroupMapping.java:144) [eventmesh-runtime-1.11.0-relea
se.jar:1.11.0-release]
at org.apache.eventmesh.runtime.boot.AbstractTCPServer$TcpConnectionHandler.channelInactive(AbstractTCPServer.java:436) [eventmesh-runtime-1.11.0-release.jar:1.11.0-rele
ase]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:303) [netty-transport-4.1.112.Final.jar:4.1.112.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:281) [netty-transport-4.1.112.Final.jar:4.1.112.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:274) [netty-transport-4.1.112.Final.jar:4.1.112.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:412) [netty-codec-4.1.112.Final.jar:4.1.112.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:377) [netty-codec-4.1.112.Final.jar:4.1.112.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:303) [netty-transport-4.1.112.Final.jar:4.1.112.Final]
at io.netty.channel.AbstractChannelHandlerContext.access$300(AbstractChannelHandlerContext.java:61) [netty-transport-4.1.112.Final.jar:4.1.112.Final]
at io.netty.channel.AbstractChannelHandlerContext$4.run(AbstractChannelHandlerContext.java:286) [netty-transport-4.1.112.Final.jar:4.1.112.Final]
at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173) [netty-common-4.1.112.Final.jar:4.1.112.Final]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166) [netty-common-4.1.112.Final.jar:4.1.112.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469) [netty-common-4.1.112.Final.jar:4.1.112.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:569) [netty-transport-4.1.112.Final.jar:4.1.112.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:994) [netty-common-4.1.112.Final.jar:4.1.112.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.112.Final.jar:4.1.112.Final]
at java.base/java.lang.Thread.run(Thread.java:834) [?:?]
```

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [x] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct) *

Start with storage/kafka consumer ConsumerImpl.java around unsubscribe at line 121 and KafkaConsumerImpl.java, then trace the close path through ClientSessionGroupMapping.cleanSubscriptionInSession. Reproduce the provided EventMeshTCPClient close sequence and inspect which threads access the KafkaConsumer. Done means the consumer can unsubscribe during client shutdown without the reported ConcurrentModificationException.

Written by the indexing model from the issue text.