Again with the missing headers

[Rob Sargent]

I saw this mentioned a couple years ago, on tomcat 7, but don't see 
anything recent on this topic and I'm using 9.0.43.  Of 59 separate 
requests to same servlet three repeatedly do not have the header entry 
added by the servlet to the response.  The remaining 56 all have the 
header/value.  The three consistently lose the header.

Size matters?  The 56 which succeed are on average 203 units in payload 
size while the bad boys are 7K,10K,13K units. (And I'm guessing about 
100 bytes per unit)

The clients streams the payload from the response, and I've tried 
getting the header both before and after the stream has been read.

Any clues as to where the missing header goes?  Does the servlet not 
send it or is it in some /other/ response?

Thanks,
rjs