I don't know, but here's a thread at AndroidCentral that discusses it:
http://forums.androidcentral.com/verizon-galaxy-note-2/247465-sync-currently-experiencing-problems-will-back-shortly.html

It's from a couple of years ago, but it may be the same issue. Also, make sure that your Sync is not turned off. Do this:

Tap Settings
Tap Apps
Tap Gmail

Scroll down to the Sync section where you should see these three items (may vary depending on the version of Android you have):

read sysc settings
read sync statistics
toggle sync on and off

Make sure it is toggled on. Regards, Joe

gudii9

9/24/2015

ASKER

Tap Settings--
Tap Apps--i do not see Apps but instead have Accounts which has Google under which gmail is there
Tap Gmail

gudii9

9/24/2015

ASKER

Tap Apps--i do not see Apps but instead have Accounts which has Google under which gmail is there

then it shows my email xyz@gmail.com under neath it says 'sync is disabled'

gudii9

9/24/2015

ASKER

when i click my email it has options like
Sync Contacts
Sync Gmail
Sync Chrome etc

when i clcick 'sync gmail' nothing happening. I do not see an opton to make auto sync or enable sync automatically?

Joe Winograd

9/24/2015

You're tapping the wrong Settings in that case. I mean the Settings on the home screen or in the list of apps screen (center button at the bottom of the home page). The one you described is the Settings in Gmail, not the main Settings.

gudii9

9/24/2015

ASKER

Not sure how to go to Apps

I do not see anything like that

Joe Winograd

9/24/2015

It can vary depending on your version of Android and what launcher you have (some phone manufacturers put their own front-end on top of Android), but most Android phones have this icon at the bottom of the home screen in the center:

Tap that and it will bring up all your apps. Scroll through them and find Settings (I use it so often that I put it on my home page). Regards, Joe

gudii9

10/1/2015

ASKER

i do not see above image. I see Settings which has stufff like

Bluetooth
Data usage
More settings

Device under this
Home Screen Mode
Blocking mode
sound
Display etc

Personal under this
Location services
Lock screen
.....

Accounts under this
Facebook
Google
Twitter
...

Syste, under this
Motion
Accessory ...

not sure wherre is GMAIL

Joe Winograd

10/8/2015

Sorry I didn't reply to your last post, but I never received an email notification from EE on it (sometimes EE fails to send out email notifications — simply a glitch in the system). I just now did receive the notification that you closed the question, which is how I saw your last post. In any event, I hope the fact that you closed it means you're back to syncing your Gmail properly. Regards, Joe