I am running OC on a Ubuntu Server. A lot of syncing is working very well but sometimes (I did not find out when) I am receiving a error message. It seams a double change on two different devices might be the issue. Even if changes are not on same file.
Error message is shown in windows tray.
For Android I am using foldersync
Any ideas where I should search for a solution?
In nginx log I found this one but I am not sure what to do
2017/02/05 21:55:47 [error] 42846#42846: *88489 FastCGI sent in stderr: "PHP message: {"reqId":"xNIp0If3QFK\/UZUSIlBG","remoteAddr":"","app":"PHP","message":"chmod(): Permission denied at \/var\/www\/owncloud\/lib\/private\/Log\/Owncloud.php#114","level":3,"time":"2017-02-05T21:55:47+01:00","method":"PUT","url":"\/owncloud\/remote.php\/webdav\/DCIM\/Camera\/20161101_152305.jpg","user":"android"}" while reading upstream, client: 192.168.100.29, server: 192.168.100.55, request: "PUT /owncloud/remote.php/webdav/DCIM/Camera/20161101_152305.jpg HTTP/1.1", upstream: "fastcgi://unix:/run/php/php7.0-fpm.sock:", host: "192.168.100.55"