Spring Cloud Openfeign feign.codec.EncodeException: null

myFeign:

    @PostMapping("/feature/values")
    FeatureRunResp getResult(@RequestBody FeatureRunReq req);

stackTrace:

feign.codec.EncodeException: null
    at feign.ReflectiveFeign$BuildEncodedTemplateFromArgs.resolve(ReflectiveFeign.java:401)
    at feign.ReflectiveFeign$BuildTemplateByResolvingArgs.create(ReflectiveFeign.java:232)
    at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:84)
    at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:100)
    at org.springframework.cloud.openfeign.FeignCachingInvocationHandlerFactory$1.proceed(FeignCachingInvocationHandlerFactory.java:66)
    at org.springframework.cache.interceptor.CacheInterceptor.lambda$invoke$0(CacheInterceptor.java:54)
    at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:351)
    at org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:64)
    at org.springframework.cloud.openfeign.FeignCachingInvocationHandlerFactory.lambda$create$1(FeignCachingInvocationHandlerFactory.java:53)
    at com.sun.proxy.$Proxy192.getResult(Unknown Source)
    at cn.caijiajia.magicquery.service.invoke.impl.MagicQueryFeatureInvokeServiceImpl.execute(MagicQueryFeatureInvokeServiceImpl.java:49)
    at cn.caijiajia.magicquery.service.FeatureExecutorService.lambda$null$3(FeatureExecutorService.java:66)
    at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1626)
    at cn.caijiajia.framework.stl.StlRunnable.run(StlRunnable.java:73)
    at cn.caijiajia.framework.tracing.async.TraceRunnable.run(TraceRunnable.java:72)
    at cn.caijiajia.tp.starter.wrapper.MetricRunnable.run(MetricRunnable.java:39)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.util.ConcurrentModificationException: null
    at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445)
    at java.util.HashMap$EntryIterator.next(HashMap.java:1479)
    at java.util.HashMap$EntryIterator.next(HashMap.java:1477)
    at com.alibaba.fastjson.serializer.MapSerializer.write(MapSerializer.java:108)
    at com.alibaba.fastjson.serializer.MapSerializer.write(MapSerializer.java:44)
    at com.alibaba.fastjson.serializer.JSONSerializer.writeWithFieldName(JSONSerializer.java:360)
    at com.alibaba.fastjson.serializer.ASMSerializer_32_FeatureRunReq.write(Unknown Source)
    at com.alibaba.fastjson.serializer.JSONSerializer.write(JSONSerializer.java:312)
    at com.alibaba.fastjson.JSON.writeJSONStringWithFastJsonConfig(JSON.java:1059)
    at com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter.writeInternal(FastJsonHttpMessageConverter.java:314)
    at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227)
    at com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter.write(FastJsonHttpMessageConverter.java:246)
    at org.springframework.cloud.openfeign.support.SpringEncoder.checkAndWrite(SpringEncoder.java:217)
    at org.springframework.cloud.openfeign.support.SpringEncoder.encodeWithMessageConverter(SpringEncoder.java:146)
    at org.springframework.cloud.openfeign.support.SpringEncoder.encode(SpringEncoder.java:134)
    at org.springframework.cloud.openfeign.support.PageableSpringEncoder.encode(PageableSpringEncoder.java:101)
    at feign.ReflectiveFeign$BuildEncodedTemplateFromArgs.resolve(ReflectiveFeign.java:396)

Comment From: OlgaMaciaszek

Hello @KAKAROTS, thanks for reporting the issue. Please learn how to properly format code and logs. Please provide a minimal, complete, verifiable example that reproduces the issue.

Comment From: KAKAROTS

it looks like AsmSerializer problem

Comment From: OlgaMaciaszek

We will not be able to verify the issue without a sample. Please provide a minimal, complete, verifiable example that reproduces the issue if you would like us to look into it.