MINOR: adding docs for failed stream thread metric (#9974)

Add docs for KIP-663.

Reviewers: Jim Galasyn <jim.galasyn@confluent.io>, Walker Carlson <wcarlson@confluent.io>, Matthias J. Sax <matthias@confluent.io>
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leah 2021-02-02 12:12:22 -06:00 committed by GitHub
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@ -2156,6 +2156,11 @@ All of the following metrics have a recording level of <code>info</code>:
<td>The state of the Kafka Streams client.</td>
<td>kafka.streams:type=stream-metrics,client-id=([-.\w]+)</td>
</tr>
<tr>
<td>failed-stream-threads</td>
<td>The number of failed stream threads since the start of the Kafka Streams client.</td>
<td>kafka.streams:type=stream-metrics,client-id=([-.\w]+)</td>
</tr>
</tbody>
</table>