Loolwsd ERR No socket associated with WebSocketHandle collabora centos7

Hello everybody,

I am trying to get collabora working on centos 7 (selinux: disabled) but I keep getting errors:

[root@collabora01 ~]# rpm -q loolwsd CODE-brand
loolwsd-4.0.2-1.el7.x86_64
CODE-brand-4.0-2.noarch

I am using an other centos7 server as proxy and I could not find good examples online so there might be an issue there but I can not find it!

Mar 22 23:19:18 collabora01 loolwsd: kit-03676-03677 2019-03-22 22:19:18.422352 [ lo_startmain ] SIG   Fatal signal received: SIGABRT
Mar 22 23:19:18 collabora01 loolwsd: Backtrace 3676:
Mar 22 23:19:18 collabora01 loolwsd: /usr/bin/loolforkit(_ZN7SigUtil13dumpBacktraceEv+0x5f) [0x4b4bef]
Mar 22 23:19:18 collabora01 loolwsd: /usr/bin/loolforkit() [0x4b5f15]
Mar 22 23:19:18 collabora01 loolwsd: /lib64/libpthread.so.0(+0xf5d0) [0x7f3e279f75d0]
Mar 22 23:19:18 collabora01 loolwsd: /lib64/libc.so.6(gsignal+0x37) [0x7f3e27651207]
Mar 22 23:19:18 collabora01 loolwsd: /lib64/libc.so.6(abort+0x148) [0x7f3e276528f8]
Mar 22 23:19:18 collabora01 loolwsd: /opt/collaboraoffice6.0/program/libmergedlo.so(_ZN16SalUserEventList18DispatchUserEventsEb+0x39c) [0x7f3e2412133c]
Mar 22 23:19:18 collabora01 loolwsd: /opt/collaboraoffice6.0/program/libmergedlo.so(_ZN14SvpSalInstance7DoYieldEbb+0x39) [0x7f3e241cd239]
Mar 22 23:19:18 collabora01 loolwsd: /opt/collaboraoffice6.0/program/libmergedlo.so(_ZN11Application5YieldEv+0x2e) [0x7f3e2413251e]
Mar 22 23:19:18 collabora01 loolwsd: /opt/collaboraoffice6.0/program/libmergedlo.so(_ZN11Application7ExecuteEv+0x45) [0x7f3e24133e15]
Mar 22 23:19:18 collabora01 loolwsd: /opt/collaboraoffice6.0/program/libmergedlo.so(+0x1f0f70c) [0x7f3e2310270c]
Mar 22 23:19:18 collabora01 loolwsd: /opt/collaboraoffice6.0/program/libmergedlo.so(+0x2f467c6) [0x7f3e241397c6]
Mar 22 23:19:18 collabora01 loolwsd: /opt/collaboraoffice6.0/program/libmergedlo.so(_Z6SVMainv+0x22) [0x7f3e241398b2]
Mar 22 23:19:18 collabora01 loolwsd: /opt/collaboraoffice6.0/program/libmergedlo.so(soffice_main+0x8a) [0x7f3e231220ea]
Mar 22 23:19:18 collabora01 loolwsd: /opt/collaboraoffice6.0/program/libmergedlo.so(+0x1f3edd1) [0x7f3e23131dd1]
Mar 22 23:19:18 collabora01 loolwsd: /opt/collaboraoffice6.0/program/libuno_sal.so.3(+0x40ea7) [0x7f3e1cf41ea7]
Mar 22 23:19:18 collabora01 loolwsd: /lib64/libpthread.so.0(+0x7dd5) [0x7f3e279efdd5]
Mar 22 23:19:18 collabora01 loolwsd: /lib64/libc.so.6(clone+0x6d) [0x7f3e27718ead]
Mar 22 23:19:18 collabora01 loolwsd: wsd-03497-03720 2019-03-22 22:19:18.431225 [ docbroker_001 ] ERR  DocumentBroker stopping although modified  Broker: test.docx pid: 3676 has live sessions
Mar 22 23:19:18 collabora01 loolwsd: loaded in: 409ms
Mar 22 23:19:18 collabora01 loolwsd: sent: 316296
Mar 22 23:19:18 collabora01 loolwsd: recv: 4607
Mar 22 23:19:18 collabora01 loolwsd: modified?: 1
Mar 22 23:19:18 collabora01 loolwsd: jail id: KzonvGdNKGlROkkD
Mar 22 23:19:18 collabora01 loolwsd: filename: test.docx
Mar 22 23:19:18 collabora01 loolwsd: public uri: https://cloud.mctest.nl:8006/nextcloud/index.php/apps/richdocuments/wopi/files/2991_ocdrxivbwcy2?access_token=hg0rm5BFG5KBAN2NTlQIyEL3ONQENxRB&access_token_ttl=0&permission=edit
Mar 22 23:19:18 collabora01 loolwsd: jailed uri: file:///user/docs/KzonvGdNKGlROkkD/test.docx
Mar 22 23:19:18 collabora01 loolwsd: doc key: /nextcloud/index.php/apps/richdocuments/wopi/files/2991_ocdrxivbwcy2
Mar 22 23:19:18 collabora01 loolwsd: doc id: 001
Mar 22 23:19:18 collabora01 loolwsd: num sessions: 1
Mar 22 23:19:18 collabora01 loolwsd: last saved: Fri Mar 22 23:19:04 2019
Mar 22 23:19:18 collabora01 loolwsd: cursor 2279, 2258( 0,280)
Mar 22 23:19:18 collabora01 loolwsd: Poll [1] - wakeup r: 22 w: 23
Mar 22 23:19:18 collabora01 loolwsd: fd#011events#011rsize#011wsize
Mar 22 23:19:18 collabora01 loolwsd: 21#0111#0110#0110#011 r: 4607#011 w: 316296#011alive     0ms
Mar 22 23:19:18 collabora01 loolwsd: id: 0002
Mar 22 23:19:18 collabora01 loolwsd: name: ToClient-0002
Mar 22 23:19:18 collabora01 loolwsd: disconnected: 0
Mar 22 23:19:18 collabora01 loolwsd: isActive: 1
Mar 22 23:19:18 collabora01 loolwsd: isCloseFrame: 0
Mar 22 23:19:18 collabora01 loolwsd: isReadOnly: 0
Mar 22 23:19:18 collabora01 loolwsd: docURL: https%3A%2F%2Fcloud.mctest.nl%3A8006%2Fnextcloud%2Findex.php%2Fapps%2Frichdocuments%2Fwopi%2Ffiles%2F2991_ocdrxivbwcy2
Mar 22 23:19:18 collabora01 loolwsd: jailedFilePath:
Mar 22 23:19:18 collabora01 loolwsd: docPwd:
Mar 22 23:19:18 collabora01 loolwsd: haveDocPwd: 0
Mar 22 23:19:18 collabora01 loolwsd: isDocPwdProtected: 0
Mar 22 23:19:18 collabora01 loolwsd: DocOptions:
Mar 22 23:19:18 collabora01 loolwsd: userId: jdoe
Mar 22 23:19:18 collabora01 loolwsd: userName: John Doe
Mar 22 23:19:18 collabora01 loolwsd: lang: en
Mar 22 23:19:18 collabora01 loolwsd: isReadOnly: 0
Mar 22 23:19:18 collabora01 loolwsd: isDocumentOwner: 1
Mar 22 23:19:18 collabora01 loolwsd: isAttached: 1
Mar 22 23:19:18 collabora01 loolwsd: keyEvents: 16
Mar 22 23:19:18 collabora01 loolwsd: sent/keystroke: 19768.5bytes
Mar 22 23:19:18 collabora01 loolwsd: queue size 0
Mar 22 23:19:18 collabora01 loolwsd: | wsd/DocumentBroker.cpp:362
Mar 22 23:19:19 collabora01 loolwsd: wsd-03497-03720 2019-03-22 22:19:19.432390 [ docbroker_001 ] ERR  Invalid or unknown session [0002] to remove.| wsd/DocumentBroker.cpp:1159
Mar 22 23:19:19 collabora01 loolwsd: wsd-03497-03720 2019-03-22 22:19:19.432432 [ docbroker_001 ] ERR  No socket associated with WebSocketHandler 0x7fbe140144c8| ./net/WebSocketHandler.hpp:108
[root@collabora01 ~]# netstat -tulpn
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      3496/sshd           
tcp        0      0 0.0.0.0:9980            0.0.0.0:*               LISTEN      3497/loolwsd        
tcp        0      0 127.0.0.1:9981          0.0.0.0:*               LISTEN      3497/loolwsd        
tcp6       0      0 :::22                   :::*                    LISTEN      3496/sshd           
udp        0      0 0.0.0.0:68              0.0.0.0:*                           3247/dhclient       
udp        0      0 127.0.0.1:323           0.0.0.0:*                           3166/chronyd        
udp6       0      0 ::1:323                 :::*                                3166/chronyd 
<VirtualHost *:443>
  ServerAdmin it@example.nl
  ServerName collabora01.example.nl:443
  ErrorLog /var/log/collabora01.example.nl_error.log
  TransferLog /var/log/collabora01.example.nl_access.log
  LogLevel info
  
  SSLEngine on

  SSLCipherSuite EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH
  SSLProtocol All -SSLv2 -SSLv3 -TLSv1 -TLSv1.1
  SSLHonorCipherOrder On
 
  SSLCertificateFile /etc/letsencrypt/live/example.nl/fullchain.pem
  SSLCertificateKeyFile /etc/letsencrypt/live/example.nl/privkey.pem
  SSLCertificateChainFile /etc/letsencrypt/live/example.nl/chain.pem
  
# Encoded slashes need to be allowed
AllowEncodedSlashes NoDecode

# Container uses a unique non-signed certificate
SSLProxyEngine On
SSLProxyVerify None
SSLProxyCheckPeerCN Off
SSLProxyCheckPeerName Off

# keep the host
ProxyPreserveHost On

# static html, js, images, etc. served from loolwsd
# loleaflet is the client part of LibreOffice Online
ProxyPass           /loleaflet https://192.168.40.110:9980/loleaflet retry=0
ProxyPassReverse    /loleaflet https://192.168.40.110:9980/loleaflet

# WOPI discovery URL
ProxyPass           /hosting/discovery https://192.168.40.110:9980/hosting/discovery retry=0
ProxyPassReverse    /hosting/discovery https://192.168.40.110:9980/hosting/discovery

# Main websocket
ProxyPassMatch "/lool/(.*)/ws$" wss://192.168.40.110:9980/lool/$1/ws nocanon

# Admin Console websocket
ProxyPass   /lool/adminws wss://192.168.40.110:9980/lool/adminws

# Download as, Fullscreen presentation and Image upload operations
ProxyPass           /lool https://192.168.40.110:9980/lool
ProxyPassReverse    /lool https://192.168.40.110:9980/lool

# Endpoint with information about availability of various features
ProxyPass           /hosting/capabilities https://192.168.40.110:9980/hosting/capabilities retry=0
ProxyPassReverse    /hosting/capabilities https://192.168.40.110:9980/hosting/capabilities
</VirtualHost>