[BUG] HertzBeat AI 400 Bad Request from POST

[proyy]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

[BUG] HertzBeat AI 400 Bad Request from POST
When the HertzBeat AI chatbot is fully and correctly configured, and after multiple confirmations that the AI provider settings are correct—including the AI provider, API key, base URL: https://api.deepseek.com/v1, and model deepseek-reasoner—the frontend reports an error for any conversation:
AI Assistant
An error occurred: 400 Bad Request from POST https://api.deepseek.com/v1/chat/completions
The backend service log stack is as follows:

` 2026-01-15 10:59:54 [reactor-http-epoll-6] ERROR org.springframework.ai.chat.model.MessageAggregator - Aggregation Error

2026-01-15T10:59:54.454975323+08:00 org.springframework.web.reactive.function.client.WebClientResponseException$BadRequest: 400 Bad Request from POST https://api.deepseek.com/v1/chat/completions

2026-01-15T10:59:54.454980895+08:00 at org.springframework.web.reactive.function.client.WebClientResponseException.create(WebClientResponseException.java:321)

2026-01-15T10:59:54.454984579+08:00 Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:

2026-01-15T10:59:54.454988119+08:00 Error has been observed at the following site(s):

2026-01-15T10:59:54.454993791+08:00 *__checkpoint ⇢ 400 BAD_REQUEST from POST https://api.deepseek.com/v1/chat/completions [DefaultWebClient]

2026-01-15T10:59:54.454997134+08:00 Original Stack Trace:

2026-01-15T10:59:54.455000107+08:00 at org.springframework.web.reactive.function.client.WebClientResponseException.create(WebClientResponseException.java:321)

2026-01-15T10:59:54.455004059+08:00 at org.springframework.web.reactive.function.client.DefaultClientResponse.lambda$createException$1(DefaultClientResponse.java:214)

2026-01-15T10:59:54.455009769+08:00 at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:106)

2026-01-15T10:59:54.455013059+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455017461+08:00 at reactor.core.publisher.FluxOnErrorReturn$ReturnSubscriber.onNext(FluxOnErrorReturn.java:162)

2026-01-15T10:59:54.455021209+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455024290+08:00 at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onNext(FluxDefaultIfEmpty.java:122)

2026-01-15T10:59:54.455027221+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455030505+08:00 at reactor.core.publisher.FluxHide$SuppressFuseableSubscriber.onNext(FluxHide.java:137)

2026-01-15T10:59:54.455033460+08:00 at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:129)

2026-01-15T10:59:54.455036399+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455039333+08:00 at reactor.core.publisher.FluxHide$SuppressFuseableSubscriber.onNext(FluxHide.java:137)

2026-01-15T10:59:54.455047352+08:00 at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)

2026-01-15T10:59:54.455050492+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455094141+08:00 at reactor.core.publisher.FluxHide$SuppressFuseableSubscriber.onNext(FluxHide.java:137)

2026-01-15T10:59:54.455097479+08:00 at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:129)

2026-01-15T10:59:54.455100441+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455103420+08:00 at reactor.core.publisher.FluxHide$SuppressFuseableSubscriber.onNext(FluxHide.java:137)

2026-01-15T10:59:54.455106315+08:00 at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:118)

2026-01-15T10:59:54.455109264+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455112217+08:00 at reactor.core.publisher.FluxHide$SuppressFuseableSubscriber.onNext(FluxHide.java:137)

2026-01-15T10:59:54.455115304+08:00 at reactor.core.publisher.Operators$BaseFluxToMonoOperator.completePossiblyEmpty(Operators.java:2097)

2026-01-15T10:59:54.455118507+08:00 at reactor.core.publisher.MonoCollect$CollectSubscriber.onComplete(MonoCollect.java:145)

2026-01-15T10:59:54.455121434+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onComplete(TracingSubscriber.java:92)

2026-01-15T10:59:54.455124791+08:00 at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144)

2026-01-15T10:59:54.455127657+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onComplete(TracingSubscriber.java:92)

2026-01-15T10:59:54.455130597+08:00 at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260)

2026-01-15T10:59:54.455133667+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onComplete(TracingSubscriber.java:92)

2026-01-15T10:59:54.455136638+08:00 at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144)

2026-01-15T10:59:54.455139612+08:00 at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:413)

2026-01-15T10:59:54.455142561+08:00 at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:455)

2026-01-15T10:59:54.455145454+08:00 at reactor.netty.channel.ChannelOperations.terminate(ChannelOperations.java:509)

2026-01-15T10:59:54.455148455+08:00 at reactor.netty.http.client.HttpClientOperations.onInboundNext(HttpClientOperations.java:819) 2026-01-15 10:59:54 [reactor-http-epoll-6] ERROR org.springframework.ai.chat.model.MessageAggregator - Aggregation Error

2026-01-15T10:59:54.454975323+08:00 org.springframework.web.reactive.function.client.WebClientResponseException$BadRequest: 400 Bad Request from POST https://api.deepseek.com/v1/chat/completions

2026-01-15T10:59:54.454980895+08:00 at org.springframework.web.reactive.function.client.WebClientResponseException.create(WebClientResponseException.java:321)

2026-01-15T10:59:54.454984579+08:00 Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:

2026-01-15T10:59:54.454988119+08:00 Error has been observed at the following site(s):

2026-01-15T10:59:54.454993791+08:00 *__checkpoint ⇢ 400 BAD_REQUEST from POST https://api.deepseek.com/v1/chat/completions [DefaultWebClient]

2026-01-15T10:59:54.454997134+08:00 Original Stack Trace:

2026-01-15T10:59:54.455000107+08:00 at org.springframework.web.reactive.function.client.WebClientResponseException.create(WebClientResponseException.java:321)

2026-01-15T10:59:54.455004059+08:00 at org.springframework.web.reactive.function.client.DefaultClientResponse.lambda$createException$1(DefaultClientResponse.java:214)

2026-01-15T10:59:54.455009769+08:00 at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:106)

2026-01-15T10:59:54.455013059+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455017461+08:00 at reactor.core.publisher.FluxOnErrorReturn$ReturnSubscriber.onNext(FluxOnErrorReturn.java:162)

2026-01-15T10:59:54.455021209+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455024290+08:00 at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onNext(FluxDefaultIfEmpty.java:122)

2026-01-15T10:59:54.455027221+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455030505+08:00 at reactor.core.publisher.FluxHide$SuppressFuseableSubscriber.onNext(FluxHide.java:137)

2026-01-15T10:59:54.455033460+08:00 at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:129)

2026-01-15T10:59:54.455036399+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455039333+08:00 at reactor.core.publisher.FluxHide$SuppressFuseableSubscriber.onNext(FluxHide.java:137)

2026-01-15T10:59:54.455047352+08:00 at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)

2026-01-15T10:59:54.455050492+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455094141+08:00 at reactor.core.publisher.FluxHide$SuppressFuseableSubscriber.onNext(FluxHide.java:137)

2026-01-15T10:59:54.455097479+08:00 at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:129)

2026-01-15T10:59:54.455100441+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455103420+08:00 at reactor.core.publisher.FluxHide$SuppressFuseableSubscriber.onNext(FluxHide.java:137)

2026-01-15T10:59:54.455106315+08:00 at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:118)

2026-01-15T10:59:54.455109264+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onNext(TracingSubscriber.java:68)

2026-01-15T10:59:54.455112217+08:00 at reactor.core.publisher.FluxHide$SuppressFuseableSubscriber.onNext(FluxHide.java:137)

2026-01-15T10:59:54.455115304+08:00 at reactor.core.publisher.Operators$BaseFluxToMonoOperator.completePossiblyEmpty(Operators.java:2097)

2026-01-15T10:59:54.455118507+08:00 at reactor.core.publisher.MonoCollect$CollectSubscriber.onComplete(MonoCollect.java:145)

2026-01-15T10:59:54.455121434+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onComplete(TracingSubscriber.java:92)

2026-01-15T10:59:54.455124791+08:00 at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144)

2026-01-15T10:59:54.455127657+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onComplete(TracingSubscriber.java:92)

2026-01-15T10:59:54.455130597+08:00 at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260)

2026-01-15T10:59:54.455133667+08:00 at io.opentelemetry.instrumentation.reactor.v3_1.TracingSubscriber.onComplete(TracingSubscriber.java:92)

2026-01-15T10:59:54.455136638+08:00 at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144)

2026-01-15T10:59:54.455139612+08:00 at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:413)

2026-01-15T10:59:54.455142561+08:00 at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:455)

2026-01-15T10:59:54.455145454+08:00 at reactor.netty.channel.ChannelOperations.terminate(ChannelOperations.java:509)

2026-01-15T10:59:54.455148455+08:00 at reactor.netty.http.client.HttpClientOperations.onInboundNext(HttpClientOperations.java:819)`

Expected Behavior

No response

Steps To Reproduce

No response

Environment

HertzBeat version(s):v1.8.0

Debug logs

No response

Anything else?

No response

[tomsun28]

hi, i test ok in 1.8.0

[proyy]

deepseek-reasoner model

[tomsun28]

It’s probably due to the parameters not being compatible with this model. Adaptation will be done later; for now, it mainly supports mainstream models.
Does not block the release of version 1.8.0

[Naman-870]

If we use deepseek-reasoner then we need code level changes .