there is a bug. for spring ai mcp flux of deepseek

[phackss]

this is spring-ai-mcp-client exceptions

-23T10:49:28.676+08:00 ERROR 99079 --- [mcp] [nio-8083-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] threw exception

com.fasterxml.jackson.databind.exc.MismatchedInputException: No content to map due to end-of-input
at [Source: REDACTED (StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION disabled); line: 1]
at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:59) ~[jackson-databind-2.17.3.jar:2.17.3]
at com.fasterxml.jackson.databind.ObjectMapper._initForReading(ObjectMapper.java:4996) ~[jackson-databind-2.17.3.jar:2.17.3]
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4898) ~[jackson-databind-2.17.3.jar:2.17.3]
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3848) ~[jackson-databind-2.17.3.jar:2.17.3]
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3831) ~[jackson-databind-2.17.3.jar:2.17.3]
at org.springframework.ai.model.ModelOptionsUtils.jsonToMap(ModelOptionsUtils.java:104) ~[spring-ai-model-1.0.0-20250519.092550-306.jar:1.0.0-SNAPSHOT]
at org.springframework.ai.model.ModelOptionsUtils.jsonToMap(ModelOptionsUtils.java:92) ~[spring-ai-model-1.0.0-20250519.092550-306.jar:1.0.0-SNAPSHOT]
at org.springframework.ai.mcp.AsyncMcpToolCallback.call(AsyncMcpToolCallback.java:109) ~[spring-ai-mcp-1.0.0-20250519.092143-444.jar:1.0.0-SNAPSHOT]
at org.springframework.ai.mcp.AsyncMcpToolCallback.call(AsyncMcpToolCallback.java:123) ~[spring-ai-mcp-1.0.0-20250519.092143-444.jar:1.0.0-SNAPSHOT]
at org.springframework.ai.model.tool.DefaultToolCallingManager.lambda$executeToolCall$5(DefaultToolCallingManager.java:224) ~[spring-ai-model-1.0.0-20250519.092550-306.jar:1.0.0-SNAPSHOT]
at io.micrometer.observation.Observation.observe(Observation.java:565) ~[micrometer-observation-1.13.8.jar:1.13.8]
at org.springframework.ai.model.tool.DefaultToolCallingManager.executeToolCall(DefaultToolCallingManager.java:221) ~[spring-ai-model-1.0.0-20250519.092550-306.jar:1.0.0-SNAPSHOT]
at org.springframework.ai.model.tool.DefaultToolCallingManager.executeToolCalls(DefaultToolCallingManager.java:137) ~[spring-ai-model-1.0.0-20250519.092550-306.jar:1.0.0-SNAPSHOT]
at org.springframework.ai.openai.OpenAiChatModel.lambda$internalStream$10(OpenAiChatModel.java:369) ~[spring-ai-openai-1.0.0-RC1.jar:1.0.0-RC1]
at reactor.core.publisher.FluxDefer.subscribe(FluxDefer.java:46) ~[reactor-core-3.6.12.jar:3.6.12]
at reactor.core.publisher.FluxSubscribeOn$SubscribeOnSubscriber.run(FluxSubscribeOn.java:194) ~[reactor-core-3.6.12.jar:3.6.12]
at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:84) ~[reactor-core-3.6.12.jar:3.6.12]
at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:37) ~[reactor-core-3.6.12.jar:3.6.12]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[na:na]
at java.base/java.lang.Thread.run(Thread.java:842) ~[na:na]

2025-05-23T10:49:28.677+08:00 ERROR 99079 --- [mcp] [nio-8083-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed: java.lang.RuntimeException: com.fasterxml.jackson.databind.exc.MismatchedInputException: No content to map due to end-of-input
at [Source: REDACTED (StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION disabled); line: 1]] with root cause

com.fasterxml.jackson.databind.exc.MismatchedInputException: No content to map due to end-of-input
at [Source: REDACTED (StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION disabled); line: 1]
at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:59) ~[jackson-databind-2.17.3.jar:2.17.3]
at com.fasterxml.jackson.databind.ObjectMapper._initForReading(ObjectMapper.java:4996) ~[jackson-databind-2.17.3.jar:2.17.3]
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4898) ~[jackson-databind-2.17.3.jar:2.17.3]
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3848) ~[jackson-databind-2.17.3.jar:2.17.3]
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3831) ~[jackson-databind-2.17.3.jar:2.17.3]
at org.springframework.ai.model.ModelOptionsUtils.jsonToMap(ModelOptionsUtils.java:104) ~[spring-ai-model-1.0.0-20250519.092550-306.jar:1.0.0-SNAPSHOT]
at org.springframework.ai.model.ModelOptionsUtils.jsonToMap(ModelOptionsUtils.java:92) ~[spring-ai-model-1.0.0-20250519.092550-306.jar:1.0.0-SNAPSHOT]
at org.springframework.ai.mcp.AsyncMcpToolCallback.call(AsyncMcpToolCallback.java:109) ~[spring-ai-mcp-1.0.0-20250519.092143-444.jar:1.0.0-SNAPSHOT]
at org.springframework.ai.mcp.AsyncMcpToolCallback.call(AsyncMcpToolCallback.java:123) ~[spring-ai-mcp-1.0.0-20250519.092143-444.jar:1.0.0-SNAPSHOT]
at org.springframework.ai.model.tool.DefaultToolCallingManager.lambda$executeToolCall$5(DefaultToolCallingManager.java:224) ~[spring-ai-model-1.0.0-20250519.092550-306.jar:1.0.0-SNAPSHOT]
at io.micrometer.observation.Observation.observe(Observation.java:565) ~[micrometer-observation-1.13.8.jar:1.13.8]
at org.springframework.ai.model.tool.DefaultToolCallingManager.executeToolCall(DefaultToolCallingManager.java:221) ~[spring-ai-model-1.0.0-20250519.092550-306.jar:1.0.0-SNAPSHOT]
at org.springframework.ai.model.tool.DefaultToolCallingManager.executeToolCalls(DefaultToolCallingManager.java:137) ~[spring-ai-model-1.0.0-20250519.092550-306.jar:1.0.0-SNAPSHOT]
at org.springframework.ai.openai.OpenAiChatModel.lambda$internalStream$10(OpenAiChatModel.java:369) ~[spring-ai-openai-1.0.0-RC1.jar:1.0.0-RC1]
at reactor.core.publisher.FluxDefer.subscribe(FluxDefer.java:46) ~[reactor-core-3.6.12.jar:3.6.12]
at reactor.core.publisher.FluxSubscribeOn$SubscribeOnSubscriber.run(FluxSubscribeOn.java:194) ~[reactor-core-3.6.12.jar:3.6.12]
at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:84) ~[reactor-core-3.6.12.jar:3.6.12]
at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:37) ~[reactor-core-3.6.12.jar:3.6.12]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[na:na]
at java.base/java.lang.Thread.run(Thread.java:842) ~[na:na]

next is deepseek see retuen message:

data: {"id":"as-5fx5jbf139","object":"chat.completion.chunk","created":1747968878,"model":"deepseek-v3","choices":[{"index":0,"delta":{"content":"","role":"assistant"},"flag":0}]}

data: {"id":"as-5fx5jbf139","object":"chat.completion.chunk","created":1747968878,"model":"deepseek-v3","choices":[{"index":0,"delta":{"content":""},"flag":0}]}

data: {"id":"as-5fx5jbf139","object":"chat.completion.chunk","created":1747968878,"model":"deepseek-v3","choices":[{"index":0,"delta":{"content":""},"flag":0}]}

data: {"id":"as-5fx5jbf139","object":"chat.completion.chunk","created":1747968878,"model":"deepseek-v3","choices":[{"index":0,"delta":{"content":""},"flag":0}]}

data: {"id":"as-5fx5jbf139","object":"chat.completion.chunk","created":1747968878,"model":"deepseek-v3","choices":[{"index":0,"delta":{"content":""},"flag":0}]}

data: {"id":"as-5fx5jbf139","object":"chat.completion.chunk","created":1747968878,"model":"deepseek-v3","choices":[{"index":0,"delta":{"content":""},"flag":0}]}

data: {"id":"as-5fx5jbf139","object":"chat.completion.chunk","created":1747968878,"model":"deepseek-v3","choices":[{"index":0,"delta":{"content":""},"flag":0}]}

data: {"id":"as-5fx5jbf139","object":"chat.completion.chunk","created":1747968878,"model":"deepseek-v3","choices":[{"index":0,"delta":{"content":""},"flag":0}]}

data: {"id":"as-5fx5jbf139","object":"chat.completion.chunk","created":1747968878,"model":"deepseek-v3","choices":[{"index":0,"delta":{"content":"","tool_calls":[{"id":"8a5b36c19de14f9ea2f4402b9346429c","type":"function","index":0,"function":{"name":"mcp_sampling_server_server1_getTemperature","arguments":""}}]},"flag":0}]}

data: {"id":"as-5fx5jbf139","object":"chat.completion.chunk","created":1747968878,"model":"deepseek-v3","choices":[{"index":0,"delta":{"content":"","tool_calls":[{"id":"8a5b36c19de14f9ea2f4402b9346429c","type":"function","index":0,"function":{"arguments":"{"latitude"}}]},"flag":0}]}

data: {"id":"as-5fx5jbf139","object":"chat.completion.chunk","created":1747968878,"model":"deepseek-v3","choices":[{"index":0,"delta":{"content":"","tool_calls":[{"id":"8a5b36c19de14f9ea2f4402b9346429c","type":"function","index":0,"function":{"arguments":"":39"}}]},"flag":0}]}