Proxmox Backup Server 4.1.6 Random Hang Issue | Proxmox Support Forum

Several Proxmox users reported issues with the Proxmox Backup Server version 4.1.6. Users experienced random hangs where the GUI became inaccessible for around 10-15 minutes, causing backup failures. One user, Singhb998, detailed their problems with version 4.1.6 after upgrading from 4.0.11, which had similar hang issues. A Proxmox staff member, Chris, inquired about system diagnostics such as systemd logs and IO delay, advising to monitor specific system parameters. Another user, Nhyi, also experienced similar hangs on version 4.1.5, indicating a potential pattern across different setups. Powersupport speculated that the problem might be related to storage I/O delays due to the high number of concurrent backup tasks, rather than CPU or RAM issues. They advised monitoring logs for disk or I/O errors, reducing concurrent backups, and checking the storage setup. Some suspicion was also raised about the NFS-backed datastore being part of the issue. Another user, Addax, shared their experience debugging a perceived S3 issue, concluding it was not related to S3 but to the version, as downgrading solved the problem. This suggests that more investigation is required to determine if the issue is a bug or due to configuration or performance limitations.