Revert "Merge pull request #10246 from nikhiljindal"

This reverts commit a902a2f014, reversing
changes made to 7df8d76a93.

pkg/registry/service/allocator/etcd/etcd.go

@@ -17,6 +17,7 @@ limitations under the License.
 package etcd
 
 import (
+	"errors"
 	"fmt"
 	"sync"
 
@@ -30,8 +31,7 @@ import (
 )
 
 var (
-	// Placeholder error that should not be surfaced to the user.
-	errorUnableToAllocate = k8serr.NewInternalError(fmt.Errorf("unable to allocate"))
+	errorUnableToAllocate = errors.New("unable to allocate")
 )
 
 // Etcd exposes a service.Allocator that is backed by etcd.
@@ -121,9 +121,6 @@ func (e *Etcd) AllocateNext() (int, bool, error) {
 		}
 		return nil
 	})
-	if err != nil && err.Error() == errorUnableToAllocate.Error() {
-		err = nil
-	}
 	return offset, ok, err
 }
 
@@ -164,10 +161,7 @@ func (e *Etcd) tryUpdate(fn func() error) error {
 			return existing, nil
 		}),
 	)
-	if err != nil {
-		err = etcderr.InterpretUpdateError(err, e.kind, "")
-	}
-	return err
+	return etcderr.InterpretUpdateError(err, e.kind, "")
 }
 
 // Refresh reloads the RangeAllocation from etcd.