Plex crashes in my movie library

Hi,

i have a problem with plex in my movie library. There are ~ 3350 movies with a SD format inside. When i want to play a movie, plex is gone. There was a problem with playback and the whole plex server is crashing. I´m on Debian 8 64bit. The permissions on the files are r-xr-xr-x. The library is mounted from another server with cifs. I tryed sshfs and nfs too but all the same. I have another smaller librarys mounted on the same way from the same server and no problems.

Here some logs:

Nov 12, 2016 09:32:12.859 [0x7f5bc97fe700] DEBUG - HTTP 200 response from GET http://127.0.0.1:32400/library/metadata/29444?X-Plex-Token=xxxxxxxxxxxxxxxxxxxx
Nov 12, 2016 09:32:12.861 [0x7f5bc97fe700] DEBUG - MDE: analyzing media item 57677
Nov 12, 2016 09:32:12.861 [0x7f5bc97fe700] DEBUG - MDE: video has no video stream but does have an audio stream
Nov 12, 2016 09:32:12.861 [0x7f5bc97fe700] DEBUG - MDE: #9 (2010): Direct Play is disabled
Nov 12, 2016 09:32:12.862 [0x7f5bc97fe700] DEBUG - MDE: #9 (2010): selected media 0 / 57677
Nov 12, 2016 09:32:12.862 [0x7f5bc97fe700] DEBUG - Streaming Resource: Adding session 0x7f5bd4084c20:eb2w0fod36tbpkdougeng66r which is using 813kbps of WAN bandwidth. Used is now 813kbps
Nov 12, 2016 09:32:12.862 [0x7f5bc97fe700] DEBUG - Streaming Resource: Added session 0x7f5bd4084c20:eb2w0fod36tbpkdougeng66r
Nov 12, 2016 09:32:12.862 [0x7f5bc97fe700] DEBUG - Streaming Resource: Reached Decision id=29444 codes=(General=1001,Direct play not available; Conversion OK. Direct Play=3000,App cannot direct play this item. Direct play is disabled. Transcode=1001,Direct play not available; Conversion OK.) media=(id=57677 part=(id=58126 decision=transcode protocol=http streams=(Audio=(id=153368 decision=transcode bitrate=774 encoder=aac channels=6 rate=48000))))
Nov 12, 2016 09:32:12.927 [0x7f5bc67fd700] DEBUG - [Notify] Now watching
Nov 12, 2016 09:32:12.928 [0x7f5bc97fe700] DEBUG - Job running: ‘/usr/lib/plexmediaserver/CrashUploader’ ‘–directory=/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Crash Reports/1.2.7.2987-1bef33a’ ‘–version=1.2.7.2987-1bef33a’ ‘–platform=linux-ubuntu-x86_64 (3.16.0-4-amd64 (#1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19)))’ ‘–serverUuid=bd5fb9a913e8cf040b550da893d594b01e447047’ ‘–userId=boecki’ ‘–url=https://crashreport.plexapp.com’

Nov 12, 2016 09:32:12.951 [0x7f81ceb64700] INFO - Crash Uploader - Platform: linux-ubuntu-x86_64 (3.16.0-4-amd64 (#1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19))) ServerUUID: UserId: boecki Version: 1.2.7.2987-1bef33a
Nov 12, 2016 09:32:12.950 [0x7f81d2f16780] DEBUG - HTTP requesting POST https://crashreport.plexapp.com
Nov 12, 2016 09:32:14.668 [0x7f81d2f16780] DEBUG - HTTP 200 response from POST https://crashreport.plexapp.com
Nov 12, 2016 09:32:14.668 [0x7f81d2f16780] INFO - Successfully reported

Any ideas ?