If anyone has been having issues with bbgen logging this error mesage on Solaris 10 and intermittently failing, resulting in blank status pages, then I think I have found a workaround.
If you disable TCP fusion be adding the following kernel parameter to /etc/system and reboot, hopefully you will find that the problem goes away.
set ip:do_tcp_fusion = 0
Apparently this can be done on a live system as well (without rebooting), but will require hobbit to be restarted. To do this:
echo do_tcp_fusion/W0 | mdb -kw
TCP fusion is only used on local loopback connections to speed them up by bypassing the normal TCP stack. I found that the problem only occured when connecting to hobbitd locally. I tried running "bb localhost hobbitdboard" once a second, and found it would often return no data, but if I ran the same command from another host to the hobbit server, it always returned correct data. This made me suspect TCP fusion, as I have run into issues with it before. It it is best left disabled in my opinion.