【AI流程设计】工作流中，LLM节点多次工具调用超过5次后 qwen 大模型返回 InputRequiredException，导致流程中断无回复

[Dana-li]

版本号：

3.9.1

分支：

main

问题描述：

使用自定义的流程进行数据查询时，当大模型需要连续执行多次（例如6次）工具（SQL查询）调用后，流程会断开（工具调用5次偶现），并且最终没有向用户返回任何回复。后台日志显示 大模型接口抛出 InputRequiredException: messages and prompt must not all null 异常。

提示词：总字符数约5860，Token估算约3000

流程编排:

应用预览调试：

错误截图：

报错日志如下：2026-03-31 13:56:07.680[OkHttp https://dashscope.aliyuncs.com/...] ERROR org.jeecg.modules.airag.flow.component.h.a:175 - com.alibaba.dashscope.exception.InputRequiredException: messages and prompt must not all null
java.lang.IllegalArgumentException: com.alibaba.dashscope.exception.InputRequiredException: messages and prompt must not all null
at dev.langchain4j.community.model.dashscope.QwenStreamingChatModel.generateByNonMultimodalModel(QwenStreamingChatModel.java:198)
at dev.langchain4j.community.model.dashscope.QwenStreamingChatModel.doChat(QwenStreamingChatModel.java:240)
at dev.langchain4j.model.chat.StreamingChatModel.chat(StreamingChatModel.java:102)
at org.jeecg.ai.stream.InternalTokenStream.doChat(InternalTokenStream.java:195)
at org.jeecg.ai.stream.InternalTokenStream$1.onCompleteResponse(InternalTokenStream.java:283)
at dev.langchain4j.model.chat.StreamingChatModel$1.onCompleteResponse(StreamingChatModel.java:91)
at dev.langchain4j.community.model.dashscope.QwenStreamingChatModel$1.onComplete(QwenStreamingChatModel.java:180)
at com.alibaba.dashscope.aigc.generation.Generation$2.onComplete(Generation.java:225)
at com.alibaba.dashscope.protocol.okhttp.OkHttpHttpClient$3.onClosed(OkHttpHttpClient.java:488)
at okhttp3.internal.sse.RealEventSource.processResponse(RealEventSource.kt:81)
at okhttp3.internal.sse.RealEventSource.onResponse(RealEventSource.kt:46)
at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:504)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:842)
Caused by: com.alibaba.dashscope.exception.InputRequiredException: messages and prompt must not all null
at com.alibaba.dashscope.aigc.generation.GenerationParam.validate(GenerationParam.java:273)
at com.alibaba.dashscope.aigc.generation.Generation.streamCall(Generation.java:196)
at dev.langchain4j.community.model.dashscope.QwenStreamingChatModel.generateByNonMultimodalModel(QwenStreamingChatModel.java:148)
... 14 common frames omitted
2026-03-31 13:56:07.682[main-thread-8] INFO org.jeecg.modules.airag.flow.a.b.onSuccess:47 - [Node-Process-After]Event:{"conversationId":"020AEDFFA5","data":{"id":"301524225754021888","inputs":{},"outputs":{},"success":true,"text":"直接回复","type":"reply"},"event":"NODE_FINISHED","flowId":"2037431630495694850","requestId":"402884989d41a59c019d42761423001a","topicId":"402884989d41a59c019d4276141b0018"}
2026-03-31 13:56:07.682[main-thread-8] INFO o.j.m.a.flow.component.j$ByteBuddy$reply$RTMSKN.info:200 - [c7f854d6f9f644b6a84ffa1f4e89bc7d]:component[reply] finished in 28407 milliseconds
2026-03-31 13:56:07.683[main-thread-8] INFO o.j.m.airag.flow.component.d$ByteBuddy$end$RXQSJZ.info:193 - [c7f854d6f9f644b6a84ffa1f4e89bc7d]:[O]start component[end] execution
2026-03-31 13:56:07.682[OkHttp https://dashscope.aliyuncs.com/...] WARN d.l.i.InternalStreamingChatResponseHandlerUtils.withLoggingExceptions:28 - An exception occurred during the invocation of StreamingChatResponseHandler.onError(). This exception has been ignored.
org.jeecg.modules.airag.flow.d.a: 调用大模型接口失败，详情请查看后台日志。
at org.jeecg.modules.airag.flow.component.j$1.c(ReplyNode.java:157)
at org.jeecg.modules.airag.flow.b.b.b(FlowMsgChannel.java:103)
at org.jeecg.modules.airag.flow.component.h.a(LlmNode.java:190)
at org.jeecg.ai.stream.InternalTokenStream$1.onError(InternalTokenStream.java:297)
at dev.langchain4j.model.chat.StreamingChatModel$1.onError(StreamingChatModel.java:97)
at dev.langchain4j.community.model.dashscope.QwenStreamingChatModel$1.lambda$onComplete$1(QwenStreamingChatModel.java:187)
at dev.langchain4j.internal.InternalStreamingChatResponseHandlerUtils.withLoggingExceptions(InternalStreamingChatResponseHandlerUtils.java:26)
at dev.langchain4j.community.model.dashscope.QwenStreamingChatModel$1.onComplete(QwenStreamingChatModel.java:187)
at com.alibaba.dashscope.aigc.generation.Generation$2.onComplete(Generation.java:225)
at com.alibaba.dashscope.protocol.okhttp.OkHttpHttpClient$3.onClosed(OkHttpHttpClient.java:488)
at okhttp3.internal.sse.RealEventSource.processResponse(RealEventSource.kt:81)
at okhttp3.internal.sse.RealEventSource.onResponse(RealEventSource.kt:46)
at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:504)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:842)

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[zhangdaiscott]

ws

[huquan-hq]

兄弟我也遇到messages and prompt must not all null 异常了，我是通过千问掉高德mcp 报错了，请问你有尝试过吗，在线等回复

[huquan-hq]

@zhangdaiscott 可以看看我提的issue吗

[huquan-hq]

@Dana-li 可以看看我提的issue吗

[Dana-li]

@huquan-hq 高德 MCP 没用过，也没见你提 issue 呀。

[huquan-hq]

@Dana-li @zhangdaiscott issue提到另外一个地址了,帮忙看看。地址是：jeecgboot/jeecg-ai#18

[jeecgai]

jeecgboot/jeecg-ai#18 已修复，该问题也同步修复，待新版本发布。