[Bug] 使用@Cacheable缓存外部接口结果，当配置了缓存为空继续执行请求接口，回放请求报NullPointerException

[wangwang0555]

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AREX Test Service

AREX Java Agent (arextest/arex-agent-java)

Current Behavior

当使用@Cacheable缓存外部接口的结果，配置unless = "#result == null" 缓存不存在继续执行外部请求时，回放该请求会报NPE
示例代码如下：

@Cacheable(value = "TEST", key = "#id", unless = "#result == null")

@Override public ProductDTO getProduct(final Integer id) {

final DataResponse<ProductDTO> dataResponse = client.getProductById(id);

return dataResponse.getData();

}

Mock的数据如下：

• 只有getProduct(final Integer id) 这个方法的mock，client.getProductById(id)并没有看到mock信息

报错信息：
java.lang.NullPointerException:

null at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:158) at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:78) at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:103) at

com.sun.proxy.$Proxy239.getProductById(Unknown Source)

本地debug后初步分析：

• 在回放流量的时候，会继续执行client.getProductById方法但是因为该方法并没有mock数据导致报了NPE

Expected Behavior

执行client.getProductById不要报NPE

Steps To Reproduce

组件版本

• spring-cloud-starter-openfeign 2.1.0
• httpclient 4.5.12

Anything else

无

Are you willing to submit a pull request to fix on your own?

• Yes I am willing to submit a pull request on my own!