Zhinan Cheng created FLINK-19009:
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Summary: wrong way to calculate the "downtime" metric
Key: FLINK-19009
URL: https://issues.apache.org/jira/browse/FLINK-19009
Project: Flink
Issue Type: Bug
Components: Runtime / Metrics
Affects Versions: 1.11.1
Environment: I found the problem in version 1.7.2 and I check the
latest source code and the latest doc in 1.11, the problem still exists.
Reporter: Zhinan Cheng
Currently the way to calculate the Flink system metric "downtime" is not
consistent with the description in the doc, now the downtime is actually the
current timestamp minus the time timestamp when the job started.
But Flink doc (https://flink.apache.org/gettinghelp.html) obviously describes
the time as the current timestamp minus the timestamp when the job failed.
I believe we should update the code this metric as the Flink doc shows. The
easy way to solve this is using the current timestamp to minus the latest
uptime timestamp.
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