UnifiedPushServer don't send pushes to FCM.

[조원형]

Hello.

I am using Aerogear for pushing services but I am struggling with big problems.

AeroGear android push service is not working.(iOS is good working.)

When unifiedPushServer is started, pushes are initially sent however it dose not work as time passes.

The log is this when the system is not running.

I change log level to DEBUG and I found the last message written by TokenLoader class.

My service is not big enough for the queue to fill up.

My service sent 50 pushes per hours.

I don't understand why queue is full.

Is there any way to solve this problem? like command to make queue empty, GCMPushMessageQueue resizing configuration, etc...

UnifiedPushServer has 2G heap size and use ParallelGC.

The push server version is 2.5.0 and it is working on wildfly 14.0.1.

ActiveMQ configuration in standalone-full.xml is 

Please help me.

Thank you.