If you receive java.lang.OutOfMemory errors, first follow the directions in the Out-of-Memory Error section of AdminSuite's online Troubleshooting guide. That should solve the problem, but if it does not then you might have insufficient "descriptors" (open files). Insufficient descriptors is more likely to be the cause of the out-of-memory errors if you have one server with multiple clients.
To view the number of descriptors, type "limit" in a c shell window:
% limit
cputime unlimited filesize unlimited datasize 2097148 kbytes stacksize 8192 kbytes coredumpsize unlimited descriptors 64 memorysuze unlimited
In this case, the default is set to 64, which may be fewer than you need. Try increasing the number of descriptors to 1024 by issuing the limit descriptors command.
% limit descriptors 1024