So, arranging all advises, if scripts .srv are changed, its md5sum will be changed even it is in the same package directory. I checked this result and put the same .srv file into the opposite devices, rosjava workspace, so as to fix this issue.
Whenever md5sum issue occurred, firstly, I should be sure if I make both workspaces have the same ros message package. I thought it was no problem to change the script if it is in the same package directory. But, was wrong.