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Mar 2, 2012, 3:53 PM
Post #1 of 1
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[Bug 1988] New: ControlPersist causes stderr to be left open until the master connection times out
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https://bugzilla.mindrot.org/show_bug.cgi?id=1988
Bug #: 1988
Summary: ControlPersist causes stderr to be left open until the
master connection times out
Classification: Unclassified
Product: Portable OpenSSH
Version: 5.8p2
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: ssh
AssignedTo: unassigned-bugs [at] mindrot
ReportedBy: amcnabb [at] mcnabbs
As has been noted previously, when ControlPersist is set, the
background process hangs on to stderr until it terminates:
https://bugzilla.mindrot.org/show_bug.cgi?id=1330#c1
https://lwn.net/Articles/401651/
This means that any script that uses stderr from an ssh script will
hang until the master connection eventually times out. I'm opening this
bug because a user noticed that this makes pssh hang:
http://code.google.com/p/parallel-ssh/issues/detail?id=67
If the background ssh process were to close stderr, then pssh would not
hang.
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