Added a HostMismatch(...) in offerUtils that checks whether a task's host requirement matches the host corresponding to the offer. Made sure all schedulers call takeOffer(...) that is defined in each scheduler, to maintain consistency.

schedulers/binpackedpistoncapping.go

@@ -15,7 +15,6 @@ import (
 	"log"
 	"math"
 	"os"
-	"strings"
 	"sync"
 	"time"
 )
@@ -258,13 +257,8 @@ func (s *BinPackedPistonCapper) ResourceOffers(driver sched.SchedulerDriver, off
 		partialLoad := 0.0
 		for i := 0; i < len(s.tasks); i++ {
 			task := s.tasks[i]
-			// Check host if it exists
-			if task.Host != "" {
-				// Don't take offer if it doens't match our task's host requirement.
-				if !strings.HasPrefix(*offer.Hostname, task.Host) {
-					continue
-				}
-			}
+			// Don't take offer if it doesn't match our task's host requirement
+			if offerUtils.HostMismatch(*offer.Hostname, task.Host) {continue}
 
 			for *task.Instances > 0 {
 				// Does the task fit