failed to send request

[742362144]

when i run ycsb test, error happened like this:

WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
WARN:splinter::dispatch: Failed to send all packets!
thread 'sched-0' panicked at 'Failed to allocate packet for request!', /root/splinter/db/src/rpc.rs:129:10

my hugepage config is 1G * 4 and 2M * 10480.
i want to know the env config in paper saying. plz help, really thanks!