commit 7f1bfb59210d8298aacbaa6ce2937adb359d802e
author Alexey Serbin <alexey@apache.org> Wed Nov 29 12:19:26 2023 -0800
committer Abhishek Chennaka <achennaka@cloudera.com> Fri Dec 01 17:57:25 2023 +0000
tree 3bba41e33e79d7471321b96fa2da39444caafa66
parent 9ede74b8a575be4185a73530181e8714a1f1b322

[tools] disambiguate parse_metrics' output

This patch improves the output of the 'kudu diagnostic parse_metrics'
CLI tool.  Prior to this patch, it was impossible to tell between
absent metric values at a particular timestamp and zeros.  With this
patch, an absent value and undefined rate of change of a metric for
a particular timestamp are indicated with the '?' ASCII character.

Change-Id: Iba0bc90a6313bd9096fa1493dd902254cdda1dc1
Reviewed-on: http://gerrit.cloudera.org:8080/20741
Tested-by: Kudu Jenkins
Reviewed-by: Abhishek Chennaka <achennaka@cloudera.com>