ThreadPool warning when Size=MaxSize

I initially configured a server with a ThreadPool Size=5 and a MaxSize=10. However, I observed that threads were being constructed and destroyed quite often (after 10 hours, I was up to 26,000 threads). In my case, each thread creation made a new DB Connection, so I was unhappy with this situation.

Instead, I configured Size=10 and did not set a MaxSize.

Now, I continue to observe these warnings:

ImagePosterCrawler-cl6: warning: thread pool `Ice.ThreadPool.Server' is running low on threads
Size=10, SizeMax=10, SizeWarn=8

Since the number of threads should now be fixed at 10 (min and max the same), why does Ice warn me about this?

>>> server describe ImagePosterCrawler-cl6
server `ImagePosterCrawler-cl6'
{
    application = `ImageServer'
    node = `cl6'
    exe = `java'
    pwd = `bin'
    activation = `on-demand'
    options = `-Djava.library.path=/usr/lib64/jmagick -Xmx100m -jar ImagePoster.jar PostContent@PostContentServerImageCrawlerGroup'
    properties
    {
        ImagePosterAdapter.Endpoints = `tcp -h cl6'
        Ice.MessageSizeMax = `10240'
        Ice.ThreadPool.Server.Size = `10'
        Ice.Default.Package = `com.wink.content'
    }
    adapter `ImagePosterAdapter'
    {
        id = `ImagePosterCrawler-cl6.ImagePosterAdapter'
        replica group id = `ImagePosterCrawlerGroup'
        endpoints = `tcp -h cl6'
        register process = `true'
        wait for activation = `true'
    }
}