Thanks for the update.
Still getting many warnings in seahub_email_sender.log and file_updates_sender.log:
/home/seafile/seafile-pro-server-7.0.7/pro/python/SQLAlchemy-1.1.3-py2.7-linux-x86_64.egg/sqlalchemy/dialects/mysql/base.py:1496: Warning: (1287L, u"'@@tx_isolation' is deprecated and will be removed in a future release. Please use '@@transaction_isolation' instead")