diff --git a/python/pyspark/rdd.py b/python/pyspark/rdd.py
index 22cead99973d1..38f353c1c29a6 100644
--- a/python/pyspark/rdd.py
+++ b/python/pyspark/rdd.py
@@ -385,6 +385,7 @@ def takeSample(self, withReplacement, num, seed=None):
         # See: scala/spark/RDD.scala
         rand = Random(seed)
         while len(samples) < total:
+            #TODO add log warning when more than one iteration was run
             samples = self.sample(withReplacement, fraction, rand.randint(0, sys.maxint)).collect()
 
         sampler = RDDSampler(withReplacement, fraction, rand.randint(0, sys.maxint))