VSA Proxies Disconnects with hotadd Mode

Last post 03-31-2020, 9:19 AM by Liam. 3 replies.
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  • VSA Proxies Disconnects with hotadd Mode
    Posted: 03-13-2020, 1:09 PM

    I'm reaching out to see if anyone else has come accross this situation. I am having an issue with our VSA proxies disconnecting during backups using hotadd transprot mode.

    Error:

    The vsbkp agent on [<vsa_proxy>] has disconnected unexpectedly.  Please ensure that services are running and that [<vsa_proxy>] is able communicate with [<vsa_proxy>].

    The configuration is as follows:

    1. Each vm cluster has it own proxies.
    2. Using hotadd transportation mode
    3. Each proxy is a Windows 2016 8x16 with automount disabled and scrubed
    4. Streams are set to 5 each proxy.
    5. VMware version is 6.7 cu3
    I've opened up a support case with CommVault. Per their notes:

    There is a known VMware issue where the hotadd manager hangs when more than 5 streams per proxy are used causing the CVD process to wait and timeout

    -  This is more prevalent in 6.5 but was also notice on 6.0

    -  There are 2 resolution here, update VMware to 6.7.2+ or force the backup to use NBD mode

    -  If VMware was running 6.5 we would force the 6.7+ VDDK from the CV side

     To isolate the issue without any VMware changes we recommend to force the backup transport mode to NBD

    I want to use hotadd mode since NBD is slower. 
    Thanks
  • Re: VSA Proxies Disconnects with hotadd Mode
    Posted: 03-19-2020, 3:05 PM

    Were you able to resolve the issue working with support?

  • Re: VSA Proxies Disconnects with hotadd Mode
    Posted: 03-19-2020, 3:23 PM

    I have not. The work around from support is to change to NBD. Per support there is an issue with vCenter 6.0 with running hotadd mode. Until it is upgraded to 6.7 + i'll have to use NBD. 

  • Re: VSA Proxies Disconnects with hotadd Mode
    Posted: 03-31-2020, 9:19 AM
    • Aplynx is not online. Last active: 09-11-2020, 4:24 PM Liam
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    6.7.3 is currenlty where VMware has seen less issues with hotadd deadlocks

     

    https://alexandria.commvault.com/article/details/52966/2560

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