damccorm opened a new issue, #20951:
URL: https://github.com/apache/beam/issues/20951
Beam metric values (payload) are not readable in Flink's web UI and Flink
history server. Similar problem affected Spark history server and it was
resolved in BEAM-10294.
Beam metrics are rendered by *MetricsContainerStepMap.toString()* method as
JSON which is created from protobuffer defined in *metrics.proto* where
metric's value is defined as bytes.
For example, metrics in Flink web UI used to look like:
```
MetricQueryResults(Counters(sets-by-key-bloomfilter/filter-by-bloom-filter/ParMultiDo(FilterByBloomFilter):org.apache.beam.sdk.extensions.sketching.BloomFilters$FilterByBloomFilterFn:filtered-out:
123456789))
```
Now they look like:
```
{\n \"metrics\": {\n \"attempted\": [{\n \"urn\":
\"beam:metric:user:sum_int64:v1\",\n \"type\": \"beam:metrics:sum_int64:v1\",\n
\"payload\": \"ip0K\",\n \"labels\": {\n \"NAMESPACE\":
\"ImageClicksReader\",\n \"NAME\": \"filtered-out\",\n
\"PTRANSFORM\":
\"sets-by-key-bloomfilter/filter-by-bloom-filter/ParMultiDo(FilterByBloomFilter\"\n
}\n } \n} \n}
```
Imported from Jira
[BEAM-12401](https://issues.apache.org/jira/browse/BEAM-12401). Original Jira
may contain additional context.
Reported by: davidak09.
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