Thanks for that. The error messages may point to an inconsistency with the jemalloc implementation for this Linux variant. You can read about Dgraph’s use of jemalloc here…
Some things to try:
What does a ls -l /usr/local/lib/libjemalloc.a produce?
If libjemalloc.a is not there, what does make jemalloc do (run from the dgraph subdirectory under the main repo folder)?