Each ISO image upload overwrote the existing iso-uploader log file. This made debugging issues difficult, especially when multiple uploads were executed. Now, log messages are written into timestamped files by default, preventing the overwrite of existing files.
The default location of the logs has been changed from /var/log/ovirt-engine to /var/log/ovirt-engine/ovirt-iso-uploader
In addition, a log rotation was introduced to compress old logs.