Jenkins version : 1.647
Gerrit Trigger : 2.18.3

AWS Server configuration
16 Cores, 30GB RAM.

We have setup gerrit and jenkins in AWS systems for Android ecosystem.
When a +1 is given in gerrit, we want jenkins to start the android build.
The jenkins jobs works well sometimes, but misses the event many times.
Only if we restart the jenkins , the job starts working well.
But after sometime same problem happens.
We have internal memory of 99GB where jenkins is installed and jobs-> workspace is in /mnt folder of AWS. There is no problem in output of the job.
Problem is that job is not starting for gerrit event.

Is this problem related to internal memory by any chance? Please suggest where can i get the logs for issue and can post the same.