[jira] [Created] (BEAM-12401) Beam metrics are unreadable in Flink history server

["David Janicek (Jira)" <ji...@apache.org>]

David Janicek created BEAM-12401:
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             Summary: Beam metrics are unreadable in Flink history server
                 Key: BEAM-12401
                 URL: https://issues.apache.org/jira/browse/BEAM-12401
             Project: Beam
          Issue Type: Improvement
          Components: runner-flink
            Reporter: David Janicek


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:
{code:java}
MetricQueryResults(Counters(sets-by-key-bloomfilter/filter-by-bloom-filter/ParMultiDo(FilterByBloomFilter):org.apache.beam.sdk.extensions.sketching.BloomFilters$FilterByBloomFilterFn:filtered-out: 123456789)){code}
Now they look like:

{code:java}
{\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}{code}
 



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