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When I connect to Python Server using Java Client, I get a 'Received request before initialization was complete' exception. #663

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When I connect to Python Server using Java Client, I get a 'Received request before initialization was complete' exception.#663
@lolosiax

Description

@lolosiax
lolosiax
opened on May 8, 2025

Describe the bug
I'm trying to use Spring boot's Client to connect to a Server written in Python with ASYNC mode, but I can't start a Spring Boot Application for any reason.

python mcp version: 1.7.1
python version: 3.12

spring boot version: 3.4.5
spring mcp client version: 1.0.0-M6
spring boot platform: webflux
java version: 21
kotlin version: 2.0.21

To Reproduce
Steps to reproduce the behavior:

  1. Shut down the Java Server on port 8001
  2. Open the Python Server on port 8001
  3. Start the Spring Boot Applicaion
  4. I see a long list of errors coming from Python Server
  5. The Spring Boot Applicaion failed to start after 20 seconds

Expected behavior
The system time can be obtained through LLM normally

Screenshots
none.

Desktop (please complete the following information):

  • OS: Windows 11
  • Browser: Microsoft Edge
  • Version: latest

Additional context
I just made this very simple function.

Server:

@Service
public class McpToolsService {
    @Tool(description = "Get the system time.")
    String getTime(String dummy){ 
        // dummy: The Java SDK Client takes NullPointerException, so there is at least one argument
        return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());
    }
}
import time
from mcp.server.fastmcp import FastMCP

mcp = FastMCP("demo-tool", port=8001)
@mcp.tool(description="Get the system time.")
async def get_time(dummy: str) -> str:
    # dummy: The Java SDK Client takes NullPointerException, so there is at least one argument
    return time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())

mcp.run(transport='sse')

Client:

@Service
class MCPClientService{
    public MCPClientService(ChatClient.Builder builder, AsyncMcpToolCallbackProvider provider){
        // Pseudo-code, the actual call to 'Builder.defaultTools(List<ToolCallback> toolCallbacks)`
        this.chatClient = builder.defaultTools(provider.getToolCallbacks()).build()
    }
    private ChatClient chatClient;
}

Here is spring boot's applicaition.yaml

spring:
  ai:
    openai:
      base-url: "http://localhost:8000/"
      api-key: "123456"
      chat:
        options:
          model: "qwen2.5-7b"
    mcp:
      client:
        type: ASYNC
        toolcallback:
          enabled: true
        sse:
          connections:
            demo-tool:
              url: "http://localhost:8001"
Python Server log 
F:\FooBar\Python\mcp-server\.venv\Scripts\python.exe F:\FooBar\Python\mcp-server\main.py 
Using proactor: IocpProactor
SseServerTransport initialized with endpoint: /messages/
INFO:     Started server process [36664]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
INFO:     Uvicorn running on http://0.0.0.0:8001 (Press CTRL+C to quit)
WARNING:  Unsupported upgrade request.
Setting up SSE connection
Created new session with ID: 3075b9e3-1eaf-49e4-ac79-4a00aa30622b
Starting SSE response task
Yielding read and write streams
Starting SSE writer
Sent endpoint event: /messages/?session_id=3075b9e31eaf49e4ac794a00aa30622b
chunk: b'event: endpoint\r\ndata: /messages/?session_id=3075b9e31eaf49e4ac794a00aa30622b\r\n\r\n'
INFO:     127.0.0.1:60422 - "GET /sse HTTP/1.1" 200 OK
Setting up SSE connection
Created new session with ID: 4549bad8-f378-4936-a9bc-c4c7b4964eae
Starting SSE response task
Yielding read and write streams
Starting SSE writer
Sent endpoint event: /messages/?session_id=4549bad8f3784936a9bcc4c7b4964eae
chunk: b'event: endpoint\r\ndata: /messages/?session_id=4549bad8f3784936a9bcc4c7b4964eae\r\n\r\n'
INFO:     127.0.0.1:60423 - "GET /sse HTTP/1.1" 200 OK
INFO:     127.0.0.1:60426 - "POST /messages/?session_id=4549bad8f3784936a9bcc4c7b4964eae HTTP/1.1" 202 Accepted
Handling POST message
Parsed session ID: 4549bad8-f378-4936-a9bc-c4c7b4964eae
Received JSON: b'{"jsonrpc":"2.0","method":"tools/list","id":"50307350-1","params":{}}'
Validated client message: root=JSONRPCRequest(method='tools/list', params={}, jsonrpc='2.0', id='50307350-1')
Sending message to writer: root=JSONRPCRequest(method='tools/list', params={}, jsonrpc='2.0', id='50307350-1')
Got event: http.disconnect. Stop streaming.
ERROR:    Exception in ASGI application
  + Exception Group Traceback (most recent call last):
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\uvicorn\protocols\http\h11_impl.py", line 403, in run_asgi
  |     result = await app(  # type: ignore[func-returns-value]
  |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\uvicorn\middleware\proxy_headers.py", line 60, in __call__
  |     return await self.app(scope, receive, send)
  |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\applications.py", line 112, in __call__
  |     await self.middleware_stack(scope, receive, send)
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\middleware\errors.py", line 187, in __call__
  |     raise exc
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\middleware\errors.py", line 165, in __call__
  |     await self.app(scope, receive, _send)
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\middleware\exceptions.py", line 62, in __call__
  |     await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\_exception_handler.py", line 53, in wrapped_app
  |     raise exc
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\_exception_handler.py", line 42, in wrapped_app
  |     await app(scope, receive, sender)
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\routing.py", line 714, in __call__
  |     await self.middleware_stack(scope, receive, send)
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\routing.py", line 734, in app
  |     await route.handle(scope, receive, send)
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\routing.py", line 288, in handle
  |     await self.app(scope, receive, send)
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\routing.py", line 76, in app
  |     await wrap_app_handling_exceptions(app, request)(scope, receive, send)
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\_exception_handler.py", line 53, in wrapped_app
  |     raise exc
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\_exception_handler.py", line 42, in wrapped_app
  |     await app(scope, receive, sender)
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\starlette\routing.py", line 73, in app
  |     response = await f(request)
  |                ^^^^^^^^^^^^^^^^
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\mcp\server\fastmcp\server.py", line 648, in sse_endpoint
  |     await handle_sse(request.scope, request.receive, request._send)  # type: ignore[reportPrivateUsage]
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\mcp\server\fastmcp\server.py", line 582, in handle_sse
  |     async with sse.connect_sse(
  |   File "D:\Program Files\Python312\Lib\contextlib.py", line 231, in __aexit__
  |     await self.gen.athrow(value)
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\mcp\server\sse.py", line 123, in connect_sse
  |     async with anyio.create_task_group() as tg:
  |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\anyio\_backends\_asyncio.py", line 772, in __aexit__
  |     raise BaseExceptionGroup(
  | ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
  +-+---------------- 1 ----------------
    | Exception Group Traceback (most recent call last):
    |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\mcp\server\sse.py", line 131, in connect_sse
    |     yield (read_stream, write_stream)
    |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\mcp\server\fastmcp\server.py", line 587, in handle_sse
    |     await self._mcp_server.run(
    |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\mcp\server\lowlevel\server.py", line 483, in run
    |     async with AsyncExitStack() as stack:
    |   File "D:\Program Files\Python312\Lib\contextlib.py", line 754, in __aexit__
    |     raise exc_details[1]
    |   File "D:\Program Files\Python312\Lib\contextlib.py", line 737, in __aexit__
    |     cb_suppress = await cb(*exc_details)
    |                   ^^^^^^^^^^^^^^^^^^^^^^
    |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\mcp\shared\session.py", line 209, in __aexit__
    |     return await self._task_group.__aexit__(exc_type, exc_val, exc_tb)
    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\anyio\_backends\_asyncio.py", line 772, in __aexit__
    |     raise BaseExceptionGroup(
    | ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
    +-+---------------- 1 ----------------
      | Traceback (most recent call last):
      |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\mcp\shared\session.py", line 331, in _receive_loop
      |     await self._received_request(responder)
      |   File "F:\FooBar\Python\mcp-server\.venv\Lib\site-packages\mcp\server\session.py", line 163, in _received_request
      |     raise RuntimeError(
      | RuntimeError: Received request before initialization was complete
      +------------------------------------
ping: b': ping - 2025-05-09 00:34:24.772913+00:00\r\n\r\n'
Got event: http.disconnect. Stop streaming.
Java Client log 
.   ____          _            __ _ _

/\ / ' __ _ () __  __ _ \ \ \ 

( ( )__ | '_ | '| | ' / ` | \ \ \ 

\/  )| |)| | | | | || (| |  ) ) ) )

'  || .__|| ||| |_, | / / / /

=========||==============|/=////


:: Spring Boot ::                (v3.4.5)


2025-05-08 15:11:14.509 INFO  com.foo.bar.AiWebApplication$Companion   : Starting AiWebApplication.Companion using Java 21.0.4 with PID 32156 (F:\FooBar\Kotlin\ai-lib-backend\build\classes\kotlin\main started by 20988 in F:\FooBar\Kotlin\ai-lib-backend)

2025-05-08 15:11:14.511 INFO  com.foo.bar.AiWebApplication$Companion   : The following 1 profile is active: "dev"

2025-05-08 15:11:14.681 INFO  .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable

2025-05-08 15:11:14.681 INFO  .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'

ebean-enhance> cls: io/micrometer/core/instrument/binder/kafka/KafkaMetrics  msg: defaulted common supertype for type1:org/apache/kafka/common/MetricName type2:java/util/Iterator due to err:java.lang.IllegalArgumentException: java.io.IOException: Class not found

ebean-enhance> cls: io/micrometer/core/instrument/binder/kafka/KafkaMetrics  msg: defaulted common supertype for type1:org/apache/kafka/common/MetricName type2:java/lang/Object due to err:java.lang.IllegalArgumentException: java.io.IOException: Class not found

ebean-enhance> cls: io/micrometer/core/instrument/binder/kafka/KafkaMetrics  msg: defaulted common supertype for type1:org/apache/kafka/common/MetricName type2:java/util/Iterator due to err:java.lang.IllegalArgumentException: java.io.IOException: Class not found

ebean-enhance> cls: io/micrometer/core/instrument/binder/kafka/KafkaMetrics  msg: defaulted common supertype for type1:org/apache/kafka/common/MetricName type2:java/lang/Object due to err:java.lang.IllegalArgumentException: java.io.IOException: Class not found

2025-05-08 15:11:37.325 WARN  onfigReactiveWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'MCPClientController': Unsatisfied dependency expressed through field 'service': Error creating bean with name 'MCPClientService' defined in file [F:\FooBar\Kotlin\ai-lib-backend\build\classes\kotlin\main\com\zxce\ai\service\ai\MCPClientService.class]: Unsatisfied dependency expressed through constructor parameter 0: Error creating bean with name 'chatClientBuilder' defined in class path resource [org/springframework/ai/autoconfigure/chat/client/ChatClientAutoConfiguration.class]: Unsatisfied dependency expressed through method 'chatClientBuilder' parameter 1: Error creating bean with name 'openAiChatModel' defined in class path resource [org/springframework/ai/autoconfigure/openai/OpenAiAutoConfiguration.class]: Unsatisfied dependency expressed through method 'openAiChatModel' parameter 4: Error creating bean with name 'toolCallingManager' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Unsatisfied dependency expressed through method 'toolCallingManager' parameter 0: Error creating bean with name 'toolCallbackResolver' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Failed to instantiate [org.springframework.ai.tool.resolution.ToolCallbackResolver]: Factory method 'toolCallbackResolver' threw exception with message: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 20000ms in 'source(MonoCreate)' (and no fallback has been configured)

2025-05-08 15:11:37.334 INFO  .s.b.a.l.ConditionEvaluationReportLogger :


Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.

2025-05-08 15:11:37.356 ERROR o.s.boot.SpringApplication               : Application run failed


org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'MCPClientController': Unsatisfied dependency expressed through field 'service': Error creating bean with name 'MCPClientService' defined in file [F:\FooBar\Kotlin\ai-lib-backend\build\classes\kotlin\main\com\zxce\ai\service\ai\MCPClientService.class]: Unsatisfied dependency expressed through constructor parameter 0: Error creating bean with name 'chatClientBuilder' defined in class path resource [org/springframework/ai/autoconfigure/chat/client/ChatClientAutoConfiguration.class]: Unsatisfied dependency expressed through method 'chatClientBuilder' parameter 1: Error creating bean with name 'openAiChatModel' defined in class path resource [org/springframework/ai/autoconfigure/openai/OpenAiAutoConfiguration.class]: Unsatisfied dependency expressed through method 'openAiChatModel' parameter 4: Error creating bean with name 'toolCallingManager' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Unsatisfied dependency expressed through method 'toolCallingManager' parameter 0: Error creating bean with name 'toolCallbackResolver' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Failed to instantiate [org.springframework.ai.tool.resolution.ToolCallbackResolver]: Factory method 'toolCallbackResolver' threw exception with message: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 20000ms in 'source(MonoCreate)' (and no fallback has been configured)

at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:788)

at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:768)

at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:146)

at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:509)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1451)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:606)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:529)

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:339)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:371)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:337)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.instantiateSingleton(DefaultListableBeanFactory.java:1221)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingleton(DefaultListableBeanFactory.java:1187)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:1122)

at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:987)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:627)

at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:66)

at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:753)

at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:439)

at org.springframework.boot.SpringApplication.run(SpringApplication.java:318)

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1362)

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1351)

at com.foo.bar.AiWebApplication$Companion.main(AiWebApplication.kt:21)

at com.foo.bar.AiWebApplication.main(AiWebApplication.kt)

at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)

at java.base/java.lang.reflect.Method.invoke(Method.java:580)

at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:50)

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'MCPClientService' defined in file [F:\FooBar\Kotlin\ai-lib-backend\build\classes\kotlin\main\com\zxce\ai\service\ai\MCPClientService.class]: Unsatisfied dependency expressed through constructor parameter 0: Error creating bean with name 'chatClientBuilder' defined in class path resource [org/springframework/ai/autoconfigure/chat/client/ChatClientAutoConfiguration.class]: Unsatisfied dependency expressed through method 'chatClientBuilder' parameter 1: Error creating bean with name 'openAiChatModel' defined in class path resource [org/springframework/ai/autoconfigure/openai/OpenAiAutoConfiguration.class]: Unsatisfied dependency expressed through method 'openAiChatModel' parameter 4: Error creating bean with name 'toolCallingManager' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Unsatisfied dependency expressed through method 'toolCallingManager' parameter 0: Error creating bean with name 'toolCallbackResolver' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Failed to instantiate [org.springframework.ai.tool.resolution.ToolCallbackResolver]: Factory method 'toolCallbackResolver' threw exception with message: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 20000ms in 'source(MonoCreate)' (and no fallback has been configured)

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:804)

at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:240)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1387)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1224)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:569)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:529)

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:339)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:371)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:337)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)

at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1739)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1627)

at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:785)

... 26 common frames omitted

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'chatClientBuilder' defined in class path resource [org/springframework/ai/autoconfigure/chat/client/ChatClientAutoConfiguration.class]: Unsatisfied dependency expressed through method 'chatClientBuilder' parameter 1: Error creating bean with name 'openAiChatModel' defined in class path resource [org/springframework/ai/autoconfigure/openai/OpenAiAutoConfiguration.class]: Unsatisfied dependency expressed through method 'openAiChatModel' parameter 4: Error creating bean with name 'toolCallingManager' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Unsatisfied dependency expressed through method 'toolCallingManager' parameter 0: Error creating bean with name 'toolCallbackResolver' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Failed to instantiate [org.springframework.ai.tool.resolution.ToolCallbackResolver]: Factory method 'toolCallbackResolver' threw exception with message: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 20000ms in 'source(MonoCreate)' (and no fallback has been configured)

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:804)

at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:546)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1367)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1197)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:569)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:529)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:357)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)

at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1739)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1627)

at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:913)

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791)

... 39 common frames omitted

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'openAiChatModel' defined in class path resource [org/springframework/ai/autoconfigure/openai/OpenAiAutoConfiguration.class]: Unsatisfied dependency expressed through method 'openAiChatModel' parameter 4: Error creating bean with name 'toolCallingManager' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Unsatisfied dependency expressed through method 'toolCallingManager' parameter 0: Error creating bean with name 'toolCallbackResolver' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Failed to instantiate [org.springframework.ai.tool.resolution.ToolCallbackResolver]: Factory method 'toolCallbackResolver' threw exception with message: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 20000ms in 'source(MonoCreate)' (and no fallback has been configured)

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:804)

at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:546)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1367)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1197)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:569)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:529)

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:339)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:371)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:337)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)

at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1739)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1627)

at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:913)

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791)

... 51 common frames omitted

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'toolCallingManager' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Unsatisfied dependency expressed through method 'toolCallingManager' parameter 0: Error creating bean with name 'toolCallbackResolver' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Failed to instantiate [org.springframework.ai.tool.resolution.ToolCallbackResolver]: Factory method 'toolCallbackResolver' threw exception with message: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 20000ms in 'source(MonoCreate)' (and no fallback has been configured)

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:804)

at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:546)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1367)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1197)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:569)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:529)

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:339)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:371)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:337)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1681)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1627)

at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:913)

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791)

... 65 common frames omitted

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'toolCallbackResolver' defined in class path resource [org/springframework/ai/autoconfigure/chat/model/ToolCallingAutoConfiguration.class]: Failed to instantiate [org.springframework.ai.tool.resolution.ToolCallbackResolver]: Factory method 'toolCallbackResolver' threw exception with message: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 20000ms in 'source(MonoCreate)' (and no fallback has been configured)

at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:657)

at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:645)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1367)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1197)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:569)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:529)

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:339)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:371)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:337)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1681)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1627)

at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:913)

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791)

... 78 common frames omitted

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.ai.tool.resolution.ToolCallbackResolver]: Factory method 'toolCallbackResolver' threw exception with message: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 20000ms in 'source(MonoCreate)' (and no fallback has been configured)

at org.springframework.beans.factory.support.SimpleInstantiationStrategy.lambda$instantiate$0(SimpleInstantiationStrategy.java:199)

at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiateWithFactoryMethod(SimpleInstantiationStrategy.java:88)

at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:168)

at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653)

... 91 common frames omitted

Caused by: reactor.core.Exceptions$ReactiveException: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 20000ms in 'source(MonoCreate)' (and no fallback has been configured)

at reactor.core.Exceptions.propagate(Exceptions.java:410)

at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:102)

at reactor.core.publisher.Mono.block(Mono.java:1779)

at org.springframework.ai.mcp.AsyncMcpToolCallbackProvider.getToolCallbacks(AsyncMcpToolCallbackProvider.java:121)

at org.springframework.ai.mcp.AsyncMcpToolCallbackProvider.getToolCallbacks(AsyncMcpToolCallbackProvider.java:72)

at org.springframework.ai.autoconfigure.chat.model.ToolCallingAutoConfiguration.lambda$toolCallbackResolver$0(ToolCallingAutoConfiguration.java:58)

at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)

at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1708)

at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)

at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)

at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)

at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)

at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)

at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)

at org.springframework.ai.autoconfigure.chat.model.ToolCallingAutoConfiguration.toolCallbackResolver(ToolCallingAutoConfiguration.java:58)

at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)

at java.base/java.lang.reflect.Method.invoke(Method.java:580)

at org.springframework.beans.factory.support.SimpleInstantiationStrategy.lambda$instantiate$0(SimpleInstantiationStrategy.java:171)

... 94 common frames omitted

Suppressed: java.lang.Exception: #block terminated with an error

at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:104)

... 110 common frames omitted

Caused by: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 20000ms in 'source(MonoCreate)' (and no fallback has been configured)

at reactor.core.publisher.FluxTimeout$TimeoutMainSubscriber.handleTimeout(FluxTimeout.java:296)

at reactor.core.publisher.FluxTimeout$TimeoutMainSubscriber.doTimeout(FluxTimeout.java:281)

at reactor.core.publisher.FluxTimeout$TimeoutTimeoutSubscriber.onNext(FluxTimeout.java:420)

at reactor.core.publisher.FluxOnErrorReturn$ReturnSubscriber.onNext(FluxOnErrorReturn.java:162)

at reactor.core.publisher.MonoDelay$MonoDelayRunnable.propagateDelay(MonoDelay.java:270)

at reactor.core.publisher.MonoDelay$MonoDelayRunnable.run(MonoDelay.java:285)

at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:68)

at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:28)

at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)

at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)

at java.base/java.lang.Thread.run(Thread.java:1583)


The process has terminated; the exit code is 0

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