[DRBD-user] opennebula cannot create datablock inside image datatore

Luke Camilleri luke.camilleri at zylacomputing.com
Thu Jun 6 16:16:21 CEST 2019

Dear Gabor I understand what you are trying to find out and will do my best to identify my actions before triggering this.

Will keep you updated

From: Gábor Hernádi [mailto:gabor.hernadi at linbit.com]
Sent: 06 June 2019 15:24
To: Luke Camilleri <luke.camilleri at zylacomputing.com>
Cc: drbd-user at lists.linbit.com
Subject: Re: [DRBD-user] opennebula cannot create datablock inside image datatore

    checkDeleted                             N      com.linbit.linstor.VolumeDefinitionData:353
    getVolumeSize                            N      com.linbit.linstor.VolumeDefinitionData:206
    getReservedCapacity                      N      com.linbit.linstor.FreeSpaceMgr:200


thanks for the report.
We are aware that we do have a bug somewhere in the FreeSpaceMgr (as shown in the partially quoted stacktrace).

However, as explained in [1], this is just a symptom. As long as we cannot find the actual cause (or multiple causes of course :) ), its hard for us to fix something like this.

This might be a race condition, but also something reproducible, once you know how :)
For now, it would help us if you can tell us what you were doing BEFORE that exception happened (before the auto-place command was executed)

As a workaround for now, you can simply restart the controller, that cleans the internal "pending" list of the FreeSpaceMgr (see [1] for more details)

[1] https://github.com/LINBIT/linstor-server/issues/57#issuecomment-498220400

Best regards,
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