Gerrit 3.6.1 - strange stuck process via internal hook

[Guy Levkowitz]

Hi 
we have internal hook that check some DB connection and lock on branch 

before the upgrade form gerrit 3.2.3 all works fine, now after upgrade we see that it get stuck almost every push (as our hook is on push)

I have added the :

ssh -p 29418 git@perkins-stg gerrit logging set-level DEBUG com.googlesource.gerrit.plugins.hooks

And when looking at the log i can see

also the process is stuck , if i will not kill the process - the WEBUIget stuck when try to add reviewer 

also from this point that it get stuck running this command which is also in the hook it get stuck (just with the user we run the gerrit process, with anther user the command works fine) :
ssh -p 29418 localhost gerrit query --format=JSON owner:guylevk project:alexeyp_test limit:2

So you have any suggestion what can it be 

BR

Guy