问题描述

• 直接错误信息
  Could not find class [org.springframework.boot.autoconfigure.condition.OnPropertyCondition]

java.util.concurrent.CompletionException: org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration c lass [org.springframework.cloud.loadbalancer.annotation.LoadBalancerClientConfiguration]; nested exception is java.lang.IllegalArgumentException: Could not find class [org.springframework.boot.autoconfigure.condition.OnPropertyCondition]
at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:314) ~[na:na]
at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:319) ~[na:na]
at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1739)[na:na]atjava.base/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1728) ~[na:na]
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) ~[na:na]
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) ~[na:na]
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[na:na]
Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [org.springframework.cloud .loadbalancer.annotation.LoadBalancerClientConfiguration]; nested exception is java.lang.IllegalArgumentException: Could not find class [ org.springframework.boot.autoconfigure.condition.OnPropertyCondition]

• 直接上伪代码

  CompletableFuture.runAsync(() -> {// feign 调用
  });
  

问题解决

这个问题其实由来已久，Spring Cloud 官方对其已有说明。
官方认为此bug优先级并不高，官方不会花精力解决；但是对社区是开放的，社区开发者可以提PR。
目前有开发者提出了一些折衷的解决方案。

1. 由于此问题与 ForkJoin 线程池底层实现有关，可以为 CompletableFuture 指定自定义线程池

    CompletableFuture.runAsync(() -> {// feign 调用}, customThreadPool);