mupdate master worker threads

[Sergio Devojno Bruder]

Today our mupdate master started to behave strangely:


Here mupdate master decided to start a new group o threads after some failed new thread creations(?!):

Apr  4 10:59:23 mupdate mupdate[10678]: accepted connection
Apr  4 10:59:23 mupdate mupdate[10678]: could not start a new worker thread (not fatal)
Apr  4 10:59:23 mupdate last message repeated 349 times
Apr  4 10:59:23 mupdate mupdate[10678]: New worker thread started, for a total of 51
Apr  4 10:59:23 mupdate mupdate[10678]: New worker thread started, for a total of 52
Apr  4 10:59:23 mupdate mupdate[10678]: New worker thread started, for a total of 53
(...)
Apr  4 10:59:23 mupdate mupdate[10678]: New worker thread started, for a total of 99
Apr  4 10:59:23 mupdate mupdate[10678]: New worker thread started, for a total of 100

Directly after that mupdate continued to start new threads and *at the same time* destroy 'old' ones:
Apr  4 10:59:23 mupdate mupdate[10678]: Worker thread finished, for a total of 99 (50 spare)
Apr  4 10:59:23 mupdate mupdate[10678]: New worker thread started, for a total of 100
Apr  4 10:59:23 mupdate mupdate[10678]: Worker thread finished, for a total of 99 (50 spare)
Apr  4 10:59:23 mupdate mupdate[10678]: New worker thread started, for a total of 100
Apr  4 10:59:23 mupdate mupdate[10678]: Worker thread finished, for a total of 99 (50 spare)
Apr  4 10:59:23 mupdate mupdate[10678]: New worker thread started, for a total of 100
Apr  4 10:59:23 mupdate mupdate[10678]: Worker thread finished, for a total of 99 (50 spare)
Apr  4 10:59:23 mupdate mupdate[10678]: New worker thread started, for a total of 100
(...)
and so on.

This behaviour is ciclical, seconds apart, create a new group of threads, destroy it.

My configuration for mupdate follows:
###
# mupdate configuration
###
mupdate_workers_start: 5
mupdate_workers_minspare: 2
mupdate_workers_maxspare: 50
mupdate_connections_max: 800
mupdate_workers_max: 800

-- 
Sergio Devojno Bruder    <bruder at haxent.com.br>
http://haxent.com.br  41 362-5930, 41 8402-2125
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