Server crash when creating a music library

Hi all,

While using Plex for all my video for months now, I am now trying to add my music (located in /volume1/music) to a new premium Music library.
Every time I am trying to do that, the server crashes a few seconds after the beginning of the scan.

The log file is not so informative, all I can see is a "long" Gracenote request for a given artist/album, followed by a call to the CrashUploader binary.

How can I proceed to find where the issue is?

I have a DS415+ running DSM 6.1-15047 Update 1, with Plex server 1.4.3.3433.

Thank you!