diff --git a/processing/src/main/java/io/druid/jackson/DefaultObjectMapper.java b/processing/src/main/java/io/druid/jackson/DefaultObjectMapper.java
index 4027fcf7ccce..88bcc527ab78 100644
--- a/processing/src/main/java/io/druid/jackson/DefaultObjectMapper.java
+++ b/processing/src/main/java/io/druid/jackson/DefaultObjectMapper.java
@@ -58,6 +58,7 @@ public DefaultObjectMapper(JsonFactory factory)
     configure(MapperFeature.AUTO_DETECT_SETTERS, false);
     configure(MapperFeature.ALLOW_FINAL_FIELDS_AS_MUTATORS, false);
     configure(SerializationFeature.INDENT_OUTPUT, false);
+    configure(SerializationFeature.FLUSH_AFTER_WRITE_VALUE, false);
   }
 
   @Override