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https://issues.apache.org/jira/browse/FLINK-7575?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16154059#comment-16154059
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ASF GitHub Bot commented on FLINK-7575:
---------------------------------------
Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/4647#discussion_r137068223
--- Diff:
flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/utils/MutableIOMetrics.java
---
@@ -79,6 +85,7 @@ public void addIOMetrics(AccessExecution attempt,
@Nullable MetricFetcher fetche
this.numBytesOut +=
Long.valueOf(metrics.getMetric(MetricNames.IO_NUM_BYTES_OUT, "0"));
this.numRecordsIn +=
Long.valueOf(metrics.getMetric(MetricNames.IO_NUM_RECORDS_IN, "0"));
this.numRecordsOut +=
Long.valueOf(metrics.getMetric(MetricNames.IO_NUM_RECORDS_OUT, "0"));
+ this.metricsFetched = true;
--- End diff --
Note that this does not necessarily mean that the num/bytes IO metrics have
been added yet; it only means that _some_ metric for the given subtask has
already arrived and was inserted into the store.
> Dashboard jobs/tasks metrics display 0 when metrics are not yet available
> -------------------------------------------------------------------------
>
> Key: FLINK-7575
> URL: https://issues.apache.org/jira/browse/FLINK-7575
> Project: Flink
> Issue Type: Improvement
> Components: Webfrontend
> Affects Versions: 1.3.2
> Reporter: James Lafa
> Assignee: James Lafa
> Priority: Minor
>
> The web frontend is currently displaying "0" when a metric is not available
> yet (ex: records-in/out, bytes-in/out).
> 0 is misleading and it's preferable to display no value while the value is
> still unknown.
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