src/main/java/org/embulk/output/jdbc/setter/NullDefaultValueSetter.java in embulk-output-jdbc-0.5.1 vs src/main/java/org/embulk/output/jdbc/setter/NullDefaultValueSetter.java in embulk-output-jdbc-0.6.0

@@ -100,6 +100,12 @@
     @Override
     public void setSqlTimestamp() throws IOException, SQLException
     {
         batch.setNull(column.getSqlType());
     }
+
+    @Override
+    public void setJson() throws IOException, SQLException
+    {
+        batch.setNull(column.getSqlType());
+    }
 }