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版本:1.3.10
代码实现:业务为REST接口,非Reactive模式,业务调用三方接口为Reactive模式,调用三方结束后,通过CompletableFuture的get方法获取三方调用结果后返回。
问题场景:压测的过程中,因三方未扩容,压测一段时间后负载均衡失败,LoadBalancer.chooseServer返回null,导致了InvokerUtils的reactiveInvoke方法传给invocation.next的AsyncResponse被调用:
invocation.next(ar -> {
ContextUtils.setInvocationContext(invocation.getParentContext());
try {
invocation.getInvocationStageTrace().finishHandlersResponse();
invocation.onFinish(ar);
asyncResp.handle(ar);
} finally {
ContextUtils.removeInvocationContext();
}
});
以上的ContextUtils.removeInvocationContext()语句执行,导致ContextUtils中的contextMgr被清理,如下业务代码执行触发空指针异常:
ContextUtils.getInvocationContext().getLocalContext().put(CommonConstant.RETURN_CODE,0)
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