diff --git a/hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/util/FlinkStateBackendConverter.java b/hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/util/FlinkStateBackendConverter.java
index a6b15ffb74e3..0e4797973e98 100644
--- a/hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/util/FlinkStateBackendConverter.java
+++ b/hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/util/FlinkStateBackendConverter.java
@@ -36,7 +36,7 @@ public StateBackend convert(String value) throws ParameterException {
       case "hashmap" : return new HashMapStateBackend();
       case "rocksdb" : return new EmbeddedRocksDBStateBackend();
       default:
-        throw new HoodieException(String.format("Unknown flink state backend %s.", value));
+        throw new HoodieException(String.format("Unknown flink state backend %s. Supports only hashmap and rocksdb by now", value));
     }
   }
 }