The slimes doesn´t spawn in the swampland, i waiting 2 minecraft days and nothing, the sllimes doesn´t spawn and the zombies, skeletons, creepers, and spiders spawn lowly
MC-62598
Slimes doesn´t spawn in the swampland
Resolved
Cannot Reproduce
0
From http://minecraft.gamepedia.com/Slime :
"In swamps, slimes may spawn at night between the heights of 50 and 70 provided the light level is 8 or less. They spawn most often on a full moon, and never on a new moon."
Have you verified the above conditions? I have had slimes spawn in swamps in these conditions in 1.7.x and the 1.8 snapshots 14wxxx.