Cannot Backup from Proxmox 7.1

[roli8200]

Hello

When try to backup vms from from proxmox 7.1 to Proxmox-Backup-Server 2.2 i mostly get the following error:

...
INFO:  62% (62.3 GiB of 100.0 GiB) in 9m, read: 66.0 MiB/s, write: 66.0 MiB/s
ERROR: backup write data failed: command error: write_data upload error: pipelined request failed: detected chunk with wrong digest.
INFO: aborting backup job
INFO: resuming VM again
ERROR: Backup of VM 400 failed - backup write data failed: command error: write_data upload error: pipelined request failed: detected chunk with wrong digest.
INFO: Failed at 2022-06-01 13:47:46
INFO: Backup job finished with errors
TASK ERROR: job errors

It helps sometimes to make a garbage collection, sometime I cannot backup the vm at all.
It always shows this error.

Both servers use ECC-Memory and a xeon processor
Times are in sync

Can someone give me a hint?

 

[fabian]

that is really strange and shouldn't happen - it basically means that the client sends a chunk with digest XX, but the server says the uploaded chunk doesn't match this digest. can you check the corresponding PBS-side task log and the journal on both ends surrounding the backup task?

 

[roli8200]

I get this from the PBS Task-Log

2022-06-01T14:02:13+02:00: starting new backup on datastore 'LocalData': "vm/400/2022-06-01T12:02:13Z"
2022-06-01T14:02:13+02:00: GET /previous: 400 Bad Request: no valid previous backup
2022-06-01T14:02:13+02:00: created new fixed index 1 ("vm/400/2022-06-01T12:02:13Z/drive-sata0.img.fidx")
2022-06-01T14:02:14+02:00: add blob "/Services/Backup/vm/400/2022-06-01T12:02:13Z/qemu-server.conf.blob" (391 bytes, comp: 391)
2022-06-01T14:15:00+02:00: POST /fixed_chunk: 400 Bad Request: detected chunk with wrong digest.
2022-06-01T14:15:01+02:00: POST /fixed_chunk: 400 Bad Request: error reading a body from connection: stream error received: stream no longer needed
2022-06-01T14:15:01+02:00: backup failed: connection error: bytes remaining on stream
2022-06-01T14:15:01+02:00: removing failed backup
2022-06-01T14:15:01+02:00: POST /fixed_chunk: 400 Bad Request: error reading a body from connection: bytes remaining on stream
2022-06-01T14:15:01+02:00: TASK ERROR: connection error: bytes remaining on stream

But the network connection is really stable. We never experience any problems.
Strange...

 

[fabian]

please double-check your memory!