Riza Suminto created KUDU-3351:
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Summary: Add insert error count metrics in WriteResponsePB
Key: KUDU-3351
URL: https://issues.apache.org/jira/browse/KUDU-3351
Project: Kudu
Issue Type: Improvement
Reporter: Riza Suminto
KUDU-1563 adds support for INSERT_IGNORE, UPDATE_IGNORE, and DELETE_IGNORE.
However, it is currently lack of per-session metrics about how many rows get
ignored vs modified.
In regular INSERT operation, we depends on per_row_errors field in
WriteResponsePB to count how many row operations are failed.
[https://github.com/apache/kudu/blob/0cb2b7c/src/kudu/tserver/tserver.proto#L175-L183]
But with INSERT_IGNORE, this field will be empty. We should add relevant
metrics field to this WriteResponsePB.
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