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[Bug 1323521] remote operation of pmie based pmda restarter interferes w

To: pcp@xxxxxxxxxxx
Subject: [Bug 1323521] remote operation of pmie based pmda restarter interferes with local pmcd
From: bugzilla@xxxxxxxxxx
Date: Fri, 08 Apr 2016 11:27:59 +0000
Auto-submitted: auto-generated
Delivered-to: pcp@xxxxxxxxxxx
In-reply-to: <bug-1323521-355098@xxxxxxxxxxxxxxxxxxx>
References: <bug-1323521-355098@xxxxxxxxxxxxxxxxxxx>
https://bugzilla.redhat.com/show_bug.cgi?id=1323521

Frank Ch. Eigler <fche@xxxxxxxxxx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|CLOSED                      |NEW
         Resolution|WONTFIX                     |---
           Keywords|                            |Reopened



--- Comment #4 from Frank Ch. Eigler <fche@xxxxxxxxxx> ---
> > [...]  Have you tested this scenario before making this assertion?
> > [...]  avoid paying its performance cost
> 
> You seem to be asking me to prove that that a hypothetical bug you've opened
> exists.  However, I see no evidence of a problem, nor would I expect to, so
> I tend to think we should spend time on more worthwhile pursuits.

The bug plainly exists in the current code.  A large-fanout central pmie server
will flood its own local pmcd with SIGHUPS, 1 per minute per remote server. 
Your assertion was that this is free of consequence.  Have you ever tested what
a pmcd does when it's given a SIGHUP multiple times a second?  (Plus a syslog
message for each?)


> > Hand-editing default configuration files is not helpful advice, esp. [...]
> 
> Oh, a misunderstanding perhaps - this is all pmieconf-driven, there's no
> hand-editing involved here.

The point is that you suggested editing the pmieconf-generated files to remove
the useless & possibly-harmful pmsignal clause.  That is an impractical
solution.

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