Hi,

Looking into the java Backend documentation 
<https://cloud.google.com/appengine/docs/java/config/backends#About_backends>, 
this seems to be expected. If you don't specify your instance to be 
dynamic, it is "resident", which means it needs to be manually started.

You should not use backends anymore, but modules. I would suggest using a 
Manually scaled module. 

In any case, in your specific case, what is getting called to start your 
worker? Do you do the call yourself, is it part of your application?

Cheers



On Monday, August 31, 2015 at 7:06:57 PM UTC-4, Tolga Tanrıverdi wrote:
>
> I'm using google app engine for my IOS and Android application's server 
> needs(Storing contents and datas for my applications) And I'm also using 
> app engine to send push notifications to mobile clients. I'm using the 
> below library to send push notifications:
> https://github.com/GoogleCloudPlatform/solutions-ios-push-notification-sample-backend-java
>
> But when I integrate the above library to my code and deploy it to my 
> google app engine account.GAE shows that there are backends in the code but 
> it doesn't deploy it to any instances. [image: GAE Frontend & Backend 
> Instance Deployments] <http://i.stack.imgur.com/CAcdo.png>
>
> But after sometimes (after 2-3 hours) it automatically deploys the worker 
> backend to 1 instance and then it starts to work and deliver 
> notifications.But this is unaccaptable for me
>
> So what I want is,my worker backend to start working immediately with the 
> frontend instance and shutdown immediately with the frontend.(So it 
> shouldn't work 7/24 ) Do you know why it may happen? Am I missing something.
>
> You can find my app engine xml files below: *AppEngine-Web XML:*
>
> <?xml version="1.0" encoding="utf-8"?>
> <appengine-web-app xmlns="http://appengine.google.com/ns/1.0";>
> <application>tokyo-analyst-845</application>
> <version>1</version>
>
> <threadsafe>true</threadsafe>
>
> <sessions-enabled>true</sessions-enabled>
>
> <system-properties>
> <property name="java.util.logging.config.file" 
> value="WEB-INF/logging.properties"/>
> </system-properties>
>
> <use-google-connector-j>true</use-google-connector-j>
>
> </appengine-web-app>
>
> *Backends.XML:*
>
> <backends>
>   <backend name="worker">
>   </backend>
>
> *Queue.XML:*
>
> <queue-entries>
>   <queue>
>     <name>notification-preprocessing</name>
>     <rate>200/s</rate>
>     <bucket-size>100</bucket-size>
>   </queue>
>   <queue>
>     <name>notification-delivery</name>
>     <mode>pull</mode>
>   </queue>
>   <queue>
>     <name>notification-device-token-cleanup</name>
>     <rate>10/s</rate>
>     <bucket-size>20</bucket-size>
>     <target>default</target>
>   </queue>
> </queue-entries>
>
> *Web.XML:*
>
>   <servlet-mapping>
>      <servlet-name>spring</servlet-name>
>      <url-pattern>/</url-pattern>
>   </servlet-mapping>
>   <context-param>
>      <param-name>contextConfigLocation</param-name>
>      <param-value>
>         /WEB-INF/spring-servlet.xml
>      </param-value>
>   </context-param>
>   <listener>
>      <listener-class>
>         org.springframework.web.context.ContextLoaderListener
>      </listener-class>
>   </listener>
> <servlet>
>   <servlet-name>PushNotificationWorkerServlet</servlet-name>
>   
> <servlet-class>com.finarapp.pn.controller.PushNotificationWorkerServlet</servlet-class>
> </servlet>
> <servlet-mapping>
>   <servlet-name>PushNotificationWorkerServlet</servlet-name>
>   <url-pattern>/_ah/start</url-pattern>
> </servlet-mapping>
>
> <servlet>
>   <servlet-name>PushPreProcessingServlet</servlet-name>
>   
> <servlet-class>com.finarapp.pn.controller.PushPreProcessingServlet</servlet-class>
> </servlet>
> <servlet-mapping>
>   <servlet-name>PushPreProcessingServlet</servlet-name>
>   <url-pattern>/admin/push/preprocessing</url-pattern>
> </servlet-mapping>
>
> Thanks
>

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