Singleton Azure函数作为单独的实例运行 [英] Singleton Azure function running as separate instances
问题描述
我们有一个Azure函数,该函数应该同时处理多个服务总线触发器,而我认为正在发生的事情是,它被拆分为多个实例,这在我们端造成了一些并发问题.
We have an Azure function that is supposed to be handling several service bus triggers at the same time and what I assume is happening is that it is being split across several instances which is causing some concurrency problems on our end.
我们需要将函数用作单例,以便我们一次可以处理一个请求而不会发生任何冲突.根据我们在本文中的研究(
We need our function to act as a singleton so we can process requests one at a time without any collisions. From what we looked into in this article (https://docs.microsoft.com/en-us/azure/app-service/webjobs-sdk-how-to#singleton-attribute) we should be able to accomplish this.
我们的功能如下:
[Microsoft.Azure.WebJobs.Singleton(Mode = SingletonMode.Listener)]
[FunctionName("AccountCreatedSubscriber")]
public static void Run([ServiceBusTrigger("accountscontacts-account-created", "license-keys", Connection = "FBISEventBus")]BrokeredMessage message, ILogger log)
{
log.LogInformation($"{{ Message received from accountscontacts-account-created topic }}");
// Do Work
log.LogInformation($"{{ Message sent to account creation handler }}");
}
为了进行备份,我们也将其保存在host.json文件中
And for backup we also have this in our host.json file,
{
"serviceBus": { "maxConcurrentCalls": 1 }
}
但是无论出于何种原因,我们的功能仍在并行运行.有什么想法吗?
But for whatever reason our functions are still running parallel. Any ideas?
推荐答案
-
如果您的功能符合使用计划,请在
WEBSITE_MAX_DYNAMIC_APPLICATION_SCALE_OUT 设置为 1
.us/azure/azure-functions/functions-app-settings#websitemaxdynamicapplicationscaleout"rel =" noreferrer>应用程序设置.
If your function is on Consumption plan, set
WEBSITE_MAX_DYNAMIC_APPLICATION_SCALE_OUT
to1
in Application settings.
在门户中检查您的Azure Function运行时版本(平台功能">功能"应用程序设置).如果大约是2,我们需要在 host.json 如下.
Check your Azure Function runtime version in portal(Platform features> Function app settings). If it's ~2, we need to modify service bus setting in host.json as below.
{
"version": "2.0",
"extensions": {
"serviceBus": {
"messageHandlerOptions": {
"maxConcurrentCalls": 1
}
}
}
}
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