Github user zentol commented on the issue:
https://github.com/apache/flink/pull/6231
This doesn't look correct to me, the serializer should always be non-null,
and silently dropping null serializers most likely just causes other problems.
Did you actually run into this NPE when using Flink, or did you explicitly
call the constructor for demonstration purposes?
As far as I can tell the code in `CRowSerializer` is either broken or a not
adequately documented hack.
It is at the very least untested as this NPE _always_ occur when this
constructor is used.
@tzulitai Why exactly is this
[constructor](https://github.com/apache/flink/blob/master/flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/types/CRowSerializer.scala#L123)
necessary?
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