Hi Kevin and Jon-Paul,
can your check the index server traces for entries like.
reading from channel 641 to 60788 <127.0.0.1:30005> failed with rc=14 (connection broken)
BufferedIO.cpp(01092) : channel 641 from <127.0.0.1:30005>: read from channel failed; resetting buffer
ERROR: reading from channel 3217 to 48415 <127.0.0.1:30005> failed with rc=14 (connection broken)
It seems that public.schemas is not responsive because it needs to collect schema names from other index server which reside in a different process.
Regards, Wolfgang