[ic] "page server pid 1234 won't die" in error log

[John1]

I am running Incterchange in RPC mode with the following in my
interchange.cfg to restrict ChildLife to 30 minutes:

ifdef TRAFFIC =~ /rpc/i
Message RPC traffic settings.
PreFork             Yes
StartServers        5
MaxServers          0
MaxRequestsPerChild 100
HouseKeeping        2
PIDcheck            120
ChildLife           30 minutes
endif

However, in the interchange error log I have load of entries as follows:

- - - [14/June/2004:11:59:29 +0100] - - page server pid 2774 won't die!
- - - [14/June/2004:11:59:29 +0100] - - page server pid 2776 won't die!
- - - [14/June/2004:11:59:29 +0100] - - page server pid 2779 won't die!
- - - [14/June/2004:12:29:35 +0100] - - page server pid 18482 won't die!
- - - [14/June/2004:12:29:35 +0100] - - page server pid 18484 won't die!
- - - [14/June/2004:12:29:35 +0100] - - page server pid 18486 won't die!
- - - [14/June/2004:12:29:35 +0100] - - page server pid 18488 won't die!
- - - [14/June/2004:12:59:41 +0100] - - page server pid 2325 won't die!
- - - [14/June/2004:12:59:41 +0100] - - page server pid 2329 won't die!
- - - [14/June/2004:12:59:41 +0100] - - page server pid 2331 won't die!
- - - [14/June/2004:12:59:41 +0100] - - page server pid 2333 won't die!

Incidentally, I am running IC 5.3.0-200404120658.

Does anyone have any idea why the processes allegedly won't die?

Thanks,

John