[MacPorts] #47374: unison freezes entire machine

[MacPorts]

#47374: unison freezes entire machine
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 Reporter:  geezel@…  |      Owner:  macports-tickets@…
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.3.3
 Keywords:  freeze    |       Port:  unison
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 Running unison on a single folder with only a few (about 50) large files
 freezes the entire machine.
 Unison itself does not crash or display an error message, but it consumes
 more and more memory until
 the machine reboots. Other processes also become unresponsive, i.e. once
 the unison command
 is launched there is no way to recover.

 For reasons discussed in this ticket
 https://trac.macports.org/ticket/45621 this has been tested
 with various versions (unison 2.40.102 compiled against ocaml 4.01 and
 4.02, and unison 2.48.3
 against ocaml 4.01). They all exhibit the same behaviour.

 Unison on FreeBSD runs fine on the same set of files (all versions). Also,
 a temporary workaround on
 Mac OS X is to run unison with the option "copythreshold = 1024", which
 makes unison use rsync
 to transfer large files.

 This might well be an upstream bug. If anybody is able to confirm this
 behaviour I'd be willing to report
 it upstream.

-- 
Ticket URL: <https://trac.macports.org/ticket/47374>
MacPorts <https://www.macports.org/>
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