java - why does SBT insist on recompiling all files when I switch machines? -

java - why does SBT insist on recompiling all files when I switch machines? -

i'm using cluster multiple machines share filesystem. managed using slurm, , in order compute time, request node period of time , 1 of 100 or more possible machines, name 'c222-103'. when switch machines, sbt insists on recompiling every single 1 of scala , java files rather ones have changed.

this doesn't happen if lastly compilation on same machine next one, e.g. if compile multiple times in single session or if request new compute session , happen same node lastly time, somewhere sbt noting machine i'm on , deciding recompile if changes, though paths same due shared filesystem.

how debug and/or prepare problem?

java scala sbt cluster-computing recompile