2.8.17版本，微服务A首次调用B微服务时，为什么会加载B微服务的线程池信息

從 OperationMeta.init 和 ExecutorManager.findExecutorById 開始，接著追蹤 CreateMicroserviceVersionEvent 經過 ServiceRegistryListener 和 MicroserviceMeta 的路徑。比較 schemaB 的 executor 設定在 microservices A 和 B 中是如何解析的，並在可能的情況下重現該故障。完成標準是記錄此查找是否符合預期，並找出所需的修正變更。

背景：

1. 微服务A首次调用微服务B，此时会有CreateMicroserviceVersionEvent事件，在微服务A中触发微服务B的元数据加载
2. 微服务B中定义针对schemaB指定了线程池executorB,但是在微服务A中并未指定

问题：

1. 此时微服务A中没有指定特殊线程池，但微服务A在查找schemaB的线程配置
   OperationMeta.init
   

2. 微服务A因为找不到schemaB线程池配置，而抛出异常

2025-01-13 18:59:40.905 [group0-1-thread-10] ERROR - [MicroserviceVersions.java:safeSetInstances:210] - [d2dfe91a-eeab-4f57-b731-8189a524f50a] - Failed to setInstances, appId=ApperySecdSerce, microserviceName=ApperySecdServippGallecDroi****Serve.
org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'healthExecutor' available
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:874) ~[spring-beans-5.3.34.jar!/:5.3.34]
at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1359) ~[spring-beans-5.3.34.jar!/:5.3.34]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.3.34.jar!/:5.3.34]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:209) ~[spring-beans-5.3.34.jar!/:5.3.34]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1171) ~[spring-context-5.3.34.jar!/:5.3.34]
at org.apache.servicecomb.foundation.common.utils.BeanUtils.getBean(BeanUtils.java:139) ~[foundation-common-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.core.executor.ExecutorManager.findExecutorById(ExecutorManager.java:118) ~[java-chassis-core-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.core.executor.ExecutorManager.findByKey(ExecutorManager.java:109) ~[java-chassis-core-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.core.executor.ExecutorManager.findExecutor(ExecutorManager.java:83) ~[java-chassis-core-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.core.executor.ExecutorManager.findExecutor(ExecutorManager.java:57) ~[java-chassis-core-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.core.definition.OperationMeta.init(OperationMeta.java:60) ~[java-chassis-core-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.core.definition.SchemaMeta.initOperationMetas(SchemaMeta.java:63) ~[java-chassis-core-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.core.definition.SchemaMeta.(SchemaMeta.java:53) ~[java-chassis-core-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.core.definition.MicroserviceMeta.registerSchemaMeta(MicroserviceMeta.java:122) ~[java-chassis-core-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.core.definition.ServiceRegistryListener.onCreateMicroserviceVersion(ServiceRegistryListener.java:105) ~[java-chassis-core-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.foundation.common.event.SimpleSubscriber.syncDispatch(SimpleSubscriber.java:118) ~[foundation-common-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.foundation.common.event.SimpleSubscriber.dispatchEvent(SimpleSubscriber.java:107) ~[foundation-common-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.foundation.common.event.SimpleEventBus.post(SimpleEventBus.java:74) ~[foundation-common-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.registry.consumer.MicroserviceVersion.(MicroserviceVersion.java:58) ~[foundation-registry-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.registry.consumer.MicroserviceVersions.createMicroserviceVersion(MicroserviceVersions.java:259) ~[foundation-registry-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.registry.consumer.MicroserviceVersions.lambda$setInstances$1(MicroserviceVersions.java:240) ~[foundation-registry-2.8.17.jar!/:2.8.17]
at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[?:1.8.0_402]
at org.apache.servicecomb.foundation.common.concurrent.ConcurrentHashMapEx.computeIfAbsent(ConcurrentHashMapEx.java:56) ~[foundation-common-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.registry.consumer.MicroserviceVersions.setInstances(MicroserviceVersions.java:239) ~[foundation-registry-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.registry.consumer.MicroserviceVersions.safeSetInstances(MicroserviceVersions.java:207) ~[foundation-registry-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.registry.consumer.MicroserviceVersions.pullInstances(MicroserviceVersions.java:186) ~[foundation-registry-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.registry.consumer.MicroserviceManager.getOrCreateMicroserviceVersions(MicroserviceManager.java:66) ~[foundation-registry-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.registry.consumer.AppManager.getOrCreateMicroserviceVersions(AppManager.java:70) ~[foundation-registry-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.registry.DiscoveryManager.getOrCreateMicroserviceVersions(DiscoveryManager.java:141) ~[foundation-registry-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.core.SCBEngine.createMicroserviceReferenceConfig(SCBEngine.java:545) ~[java-chassis-core-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.core.SCBEngine.createMicroserviceReferenceConfig(SCBEngine.java:516) ~[java-chassis-core-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.provider.springmvc.reference.CseClientHttpRequest.createRequestMeta(CseClientHttpRequest.java:184) ~[provider-springmvc-2.8.17.jar!/:2.8.17]
at org.apache.servicecomb.provider.springmvc.reference.CseClientHttpRequest.execute(CseClientHttpRequest.java:169) ~[provider-springmvc-2.8.17.jar!/:2.8.17]
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:782) ~[spring-web-5.3.34.jar!/:?]
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:717) ~[spring-web-5.3.34.jar!/:?]
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:637) ~[spring-web-5.3.34.jar!/:?]
at org.apache.servicecomb.provider.springmvc.reference.RestTemplateWrapper.exchange(RestTemplateWrapper.java:196) ~[provider-springmvc-2.8.17.jar!/:2.8.17]

疑问：
请帮解答下为什么需要在微服务A中查找微服务B的schemaB配置的线程池？