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  1. Ambari
  2. AMBARI-24256

Ambari Grafana HBase metrics wrong - readRequestCount > totalRequestCount!

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 2.5.2
    • Fix Version/s: None
    • Component/s: ambari-metrics
    • Labels:
      None
    • Environment:

      HDP 2.6

      Description

      Ambari Grafana metrics appear to have another bug in HBase - Home -> Num Requests - Total.

      writeRequestCount and totalRequestCount are about the same but readRequestCount is consistently triple that of totalRequestCount which cannot possibly be true...

      totalRequestCount should == writeRequestCount + readRequestCount, but this is not the case.

      It looks like this may be due to multi requests being counted only once, see HBASE-18469.

      This is not at all intuitive, it would have been better to have made totalRequestCount == writeRequestCount + readRequestCount and made a new metric to count multi requests as a single request.

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          Issue Links

          relates to

          Improvement - An improvement or enhancement to an existing feature or task. HBASE-18469 Correct RegionServer metric of totalRequestCount

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. HBASE-20626 Change the value of "Requests Per Second" on WEBUI

          • Major - Major loss of function.
          • Resolved

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              • Assignee:
                Unassigned
                Reporter:
                harisekhon Hari Sekhon
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                Dates

                • Created:
                  Updated: