[BUG] SequentialReact 多个智能体顺序执行会阻塞？

[sunxien]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

SequentialAgent.builder() .name("test_workflow") .executor(this.customExecutor) // 问题：如果未指定自定义的线程池 .subAgents(List.of(agent1, agent2, agent3)) .build();
多个智能体顺序执行，为什么会阻塞？阻塞的堆栈是：

`
"HttpClient-1-SelectorManager" #16 daemon prio=5 os_prio=31 cpu=4.52ms elapsed=163.49s tid=0x00007f95fd4af800 nid=0x9d0f runnable [0x00000003061f7000]
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.KQueue.poll(java.base@17.0.12/Native Method)
at sun.nio.ch.KQueueSelectorImpl.doSelect(java.base@17.0.12/KQueueSelectorImpl.java:122)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(java.base@17.0.12/SelectorImpl.java:129)
- locked <0x00000007009ad2b8> (a sun.nio.ch.Util$2)
- locked <0x00000007009ad260> (a sun.nio.ch.KQueueSelectorImpl)
at sun.nio.ch.SelectorImpl.select(java.base@17.0.12/SelectorImpl.java:141)
at jdk.internal.net.http.HttpClientImpl$SelectorManager.run(java.net.http@17.0.12/HttpClientImpl.java:892)

"HttpClient-2-SelectorManager" #17 daemon prio=5 os_prio=31 cpu=2501.12ms elapsed=163.46s tid=0x00007f95fdaa5400 nid=0x914f runnable [0x00000003062fa000]
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.KQueue.poll(java.base@17.0.12/Native Method)
at sun.nio.ch.KQueueSelectorImpl.doSelect(java.base@17.0.12/KQueueSelectorImpl.java:122)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(java.base@17.0.12/SelectorImpl.java:129)
- locked <0x0000000700998dd0> (a sun.nio.ch.Util$2)
- locked <0x0000000700998d78> (a sun.nio.ch.KQueueSelectorImpl)
at sun.nio.ch.SelectorImpl.select(java.base@17.0.12/SelectorImpl.java:141)
at jdk.internal.net.http.HttpClientImpl$SelectorManager.run(java.net.http@17.0.12/HttpClientImpl.java:892)
`

Expected Behavior

Program should exit if finished

Steps To Reproduce

JDK 17, 21

Environment

Spring AI Alibaba version(s): 

<dependency>
            <groupId>org.springframework.ai</groupId>
            <artifactId>spring-ai-openai</artifactId>
            <version>1.1.2</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud.ai</groupId>
            <artifactId>spring-ai-alibaba-agent-framework</artifactId>
            <version>1.1.0.0-RC1</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud.ai</groupId>
            <artifactId>spring-ai-alibaba-graph-core</artifactId>
            <version>1.1.0.0-RC1</version>
        </dependency>

Debug logs

No response

Anything else?

No response