Coucbase server not showing any buckets

Hi there,

I am new to this. i have couchbase server and synch gateway. i have been using so far… But today suddenly. my iOS app working stop. i crsso checked synch gatway is not responsding. i seen couchbase server. Here there is no bucket showing. Can you please some on help me on this. here i am attaching my server logs and synch gatwat logs as well.

Synchgateway logs: