love01211 opened a new issue, #3772:
URL: https://github.com/apache/hertzbeat/issues/3772
### Is there an existing issue for this?
- [x] I have searched the existing issues
### Current Behavior
There are no issues with the interface or functionality, but when I reviewed
the backend logs, I found error logs with no discernible pattern in their
timing.
### Expected Behavior
_No response_
### Steps To Reproduce
1. cat localhost.localdomain2540-2025-09-17-error.0.log
2025-09-17 13:58:00.796 [http-nio-1157-exec-1] ERROR
org.apache.hertzbeat.manager.support.GlobalExceptionHandler Line:252 -
[monitor]-[unknown error happen]-Response not usable after response errors.
org.springframework.web.context.request.async.AsyncRequestNotUsableException:
Response not usable after response errors.
at
org.springframework.web.context.request.async.StandardServletAsyncWebRequest$LifecycleHttpServletResponse.obtainLockOrRaiseException(StandardServletAsyncWebRequest.java:338)
at
org.springframework.web.context.request.async.StandardServletAsyncWebRequest$LifecycleHttpServletResponse.flushBuffer(StandardServletAsyncWebRequest.java:320)
at
org.springframework.http.server.ServletServerHttpResponse.flush(ServletServerHttpResponse.java:105)
at
org.springframework.http.server.DelegatingServerHttpResponse.flush(DelegatingServerHttpResponse.java:61)
at
org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$DefaultSseEmitterHandler.complete(ResponseBodyEmitterReturnValueHandler.java:320)
at
org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.complete(ResponseBodyEmitter.java:252)
at
org.apache.hertzbeat.alert.config.AlertSseManager.lambda$broadcast$3(AlertSseManager.java:57)
at
java.base/java.util.concurrent.ConcurrentHashMap.forEach(ConcurrentHashMap.java:1603)
at
org.apache.hertzbeat.alert.config.AlertSseManager.broadcast(AlertSseManager.java:50)
at
java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:359)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:196)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
at
org.springframework.aop.interceptor.AsyncExecutionInterceptor.lambda$invoke$0(AsyncExecutionInterceptor.java:114)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
at java.base/java.lang.Thread.run(Thread.java:1583)
### Environment
```markdown
HertzBeat version(s):1.7.3
```
### Debug logs
_No response_
### Anything else?
_No response_
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