When the Microsoft Lync Server 2013 Web Conferencing service tries to write data into the CollabJournal folder in a Lync file share, the following event is logged:
Log Name: Lync Server
Source: LS Data MCU
Event ID: 41027
The content file store is full or unavailable, and no more data can be written to it.
Content file store location: \\server.contoso.net\LyncDataPool2\1-WebServices-20\CollabJournal
Reason: An unexpected network error occurred.Note This issue only occurs in an environment that has paired front-end pools deployed. Note This issue occurs only in an environment that has paired front-end pools deployed.
This issue occurs because the Web Conferencing service does not retry to write data data to the Lync file share if it encounters a temporary problem.
To resolve this issue, install the May 2015 cumulative update for your Lync Server 2013 Web Conferencing server.