diff --git a/server/src/main/java/io/druid/client/cache/MemcachedCache.java b/server/src/main/java/io/druid/client/cache/MemcachedCache.java
index 91357c58971..e0196b6db4a 100644
--- a/server/src/main/java/io/druid/client/cache/MemcachedCache.java
+++ b/server/src/main/java/io/druid/client/cache/MemcachedCache.java
@@ -74,6 +74,12 @@ public class MemcachedCache implements Cache
 {
   private static final Logger log = new Logger(MemcachedCache.class);
 
+  /**
+   * Default hash algorithm for cache distribution.
+   *
+   * If some other algorithms are considered as the default algorithm instead of this one, the cache distribution for
+   * those hash algorithms should be checked and compared using {@code CacheDistributionTest}.
+   */
   final static HashAlgorithm MURMUR3_128 = new HashAlgorithm()
   {
     final HashFunction fn = Hashing.murmur3_128();
diff --git a/server/src/test/java/io/druid/client/cache/CacheDistributionTest.java b/server/src/test/java/io/druid/client/cache/CacheDistributionTest.java
index 0c61e092d1f..bf8878fb739 100644
--- a/server/src/test/java/io/druid/client/cache/CacheDistributionTest.java
+++ b/server/src/test/java/io/druid/client/cache/CacheDistributionTest.java
@@ -32,6 +32,7 @@ import net.spy.memcached.util.DefaultKetamaNodeLocatorConfiguration;
 import org.apache.commons.codec.digest.DigestUtils;
 import org.easymock.EasyMock;
 import org.junit.BeforeClass;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -93,7 +94,10 @@ public class CacheDistributionTest
     this.reps = reps;
   }
 
-  // run to get a sense of cache key distribution for different ketama reps / hash functions
+  // Run to get a sense of cache key distribution for different ketama reps / hash functions
+  // This test is disabled by default because it's a qualitative test not an unit test and thus it have a meaning only
+  // when being run and checked by humans.
+  @Ignore
   @Test
   public void testDistribution() throws Exception
   {