rsync - Jan 2022 - [Bug 14962] New: Crash/restart using rsync 3.2.3 on M1 Mac

https://bugzilla.samba.org/show_bug.cgi?id=14962

            Bug ID: 14962
           Summary: Crash/restart using rsync 3.2.3 on M1 Mac
           Product: rsync
           Version: 3.2.0
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5
         Component: core
          Assignee: wayne at opencoder.net
          Reporter: arjunmeht at gmail.com
        QA Contact: rsync-qa at samba.org
  Target Milestone: ---

Hi there,

Whole (macOS) system is crashing when transferring a large number of files from
Mac to NAS via rsync.

Running the below command on a directory with thousands of images (~5MB each)
the transfer speed eventually slows down, the system gets choppy, freezes and
then eventually the entire computer reboots.

rsync -va --update --info=progress2 /Volumes/Source/folder
/Volumes/Destination/folder

I found this reported here as well:
https://apple.stackexchange.com/questions/421007/rsync-3-2-3-keeps-crashing-on-mac-mini-m1#

I experienced this on a M1 Mac mini running macOS Monterey. The stackexchange
post is running Big Sur.

rsync 3.2.3 was installed via homebrew (brew install rsync) so it may be
possible this is a homebrew distribution/compile problem.

The only solution for me was to downgrade back to use the included rsync in
macOS (rsync version 2.6.9 protocol version 29)

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https://bugzilla.samba.org/show_bug.cgi?id=14962

--- Comment #1 from Mike Bombich <mike at bombich.com> ---
This is probably the same kernel memory leak I documented here:

https://bombich.com/kb/ccc6/macos-monterey-known-issues#smb_panics

You can confirm whether it's the same issue by looking for
zone_map_exhaustion
in the system log. e.g.:

- Start your rsync task
- Run `log --stream | grep zone_map_exhaustion` in a Terminal window
- Run `sudo zprint -d kext.kalloc.32768` in another Terminal window

Also watch memory pressure in Activity Monitor. I saw a gradual and steady
increase, although it never got to a "warning" level before memoryd
started
killing things.

If that's what you're seeing, it's not an rsync bug, it's a bug
in macOS.

Mike
> On Jan 27, 2022, at 11:26AM, just subscribed for rsync-qa from bugzilla via
rsync <rsync at lists.samba.org> wrote:
> 
> https://bugzilla.samba.org/show_bug.cgi?id=14962
> 
>            Bug ID: 14962
>           Summary: Crash/restart using rsync 3.2.3 on M1 Mac
>           Product: rsync
>           Version: 3.2.0
>          Hardware: All
>                OS: All
>            Status: NEW
>          Severity: normal
>          Priority: P5
>         Component: core
>          Assignee: wayne at opencoder.net
>          Reporter: arjunmeht at gmail.com
>        QA Contact: rsync-qa at samba.org
>  Target Milestone: ---
> 
> Hi there,
> 
> Whole (macOS) system is crashing when transferring a large number of files
from
> Mac to NAS via rsync.
> 
> Running the below command on a directory with thousands of images (~5MB
each)
> the transfer speed eventually slows down, the system gets choppy, freezes
and
> then eventually the entire computer reboots.
> 
> rsync -va --update --info=progress2 /Volumes/Source/folder
> /Volumes/Destination/folder
> 
> I found this reported here as well:
>
https://apple.stackexchange.com/questions/421007/rsync-3-2-3-keeps-crashing-on-mac-mini-m1#
> 
> I experienced this on a M1 Mac mini running macOS Monterey. The
stackexchange
> post is running Big Sur.
> 
> rsync 3.2.3 was installed via homebrew (brew install rsync) so it may be
> possible this is a homebrew distribution/compile problem.
> 
> The only solution for me was to downgrade back to use the included rsync in
> macOS (rsync version 2.6.9 protocol version 29)
> 
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> You are the QA Contact for the bug.
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