vinothchandar commented on issue #2391:
URL: https://github.com/apache/hudi/issues/2391#issuecomment-752319608
I think only `put()` calls populate the underlying hashtable. if you notice,
`Properties` has the same behavior
```
Properties properties = new Properties();
properties.put("key1", "value1");
System.out.println(properties.containsKey("key1"));
Properties newProperties = new Properties(properties);
System.out.println(newProperties.containsKey("key1"));
```
prints
```
true
false
```
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