Update Firebase Timestamp Value

I want to update the initial server timestamp value stored in my firebase database, so i did it in such a way that the timestamp value will be updated subsequently, but this seems to be causing major problem when i run the app, at first it works fine but after changing the value twice then it just freezes like the timestamp is constantly updated. I don.t know how i can make it perfect.

Below is the code were i add and want to change the timestamp value.

  mRootRef.child("Chat").child(mCurrentUserId).addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            if (!dataSnapshot.hasChild(mChatUser)){
                Map chatAddMap = new HashMap();
                chatAddMap.put("seen",false);
                chatAddMap.put("uid",mChatUser);
                chatAddMap.put("timestamp", ServerValue.TIMESTAMP);

                Map chatUserMap = new HashMap();
                chatUserMap.put("Chat/" + mCurrentUserId + "/" + mChatUser,chatAddMap);
                chatUserMap.put("Chat/" + mChatUser + "/" + mCurrentUserId,chatAddMap);

                mRootRef.updateChildren(chatUserMap, new DatabaseReference.CompletionListener() {
                    @Override
                    public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) {

                        if (databaseError != null){
                            Log.d("CHAT LOG", databaseError.getMessage().toString());
                        }

                    }
                });
            }else {

                mRootRef.child("Chat").child(mCurrentUserId).child(mChatUser).child("timestamp").setValue(ServerValue.TIMESTAMP);
            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {


        }
    });

I finally found the solution to my problem and i feel i should post it here because this issue doesn't seem to have any solution online.

So what is happening here is that i did not add a check for a situation that needs to be true before timestamp will be updated, there by causing the endless loop since it doesn't know when to stop.

So I resolved it by simply wrapping this code

                mRootRef.child("Chat").child(mCurrentUserId).child(mChatUser).child("timestamp").setValue(ServerValue.TIMESTAMP);

in an if statement that checks if the new time is equal to the value already stored in firebase, if it is true it dose nothing but if it is not only then it should update to current time.