Add to worker some checks for case if RPC server is unavailable. Now it will not fail, but continue to wait for server come back.
Add to worker some checks for case if RPC server is unavailable. Now it will not fail, but continue to wait for server come back.

anthony-kolesov/kts46,anthony-kolesov/kts46,anthony-kolesov/kts46,anthony-kolesov/kts46