Make sure that you do the binding of distributedlog to Ledgers of Bookkeeper
Example command:
<bookkeeper folder>/bin/dlog admin bind -l /ledgers -s localhost:2181 -c distributedlog://localhost:2181/streams
After binding you can issue the SBK command for benchmarking
./build/distributions/sbk/bin/sbk -class bookkeeper -uri distributedlog://localhost:2181/streams -log kmg-test2 -writers 1 -size 1000 -seconds 60 -recreate true