[jira] [Created] (AMBARI-25400) Issue while determining live collector in case of HA

["amarnath reddy pappu (Jira)" <ji...@apache.org>]

amarnath reddy pappu created AMBARI-25400:
---------------------------------------------

             Summary: Issue while determining live collector in case of HA
                 Key: AMBARI-25400
                 URL: https://issues.apache.org/jira/browse/AMBARI-25400
             Project: Ambari
          Issue Type: Bug
          Components: ambari-metrics
    Affects Versions: 2.6.2, 2.7.4
            Reporter: amarnath reddy pappu


If collector throws http://collectorhost:port/{color:#032f62}/ws/v1/timeline/metrics/livenodes{color} 500 error then sink is unable to determine live/healthy collector.

 

sink will try to connect to another collector only if it is not reachable/IOException to first collector.  if any other response code other than 200 then still it should consider as 1st Collector not reachable.

 

[https://github.com/apache/ambari/blob/release-2.7.4/ambari-metrics/ambari-metrics-common/src/main/java/org/apache/hadoop/metrics2/sink/timeline/AbstractTimelineMetricsSink.java#L629]

 

 
{code:java}
      if (responseCode == 200) {
        try (InputStream in = connection.getInputStream()) {
          StringWriter writer = new StringWriter();
          IOUtils.copy(in, writer);
          try {
            collectors = gson.fromJson(writer.toString(), new TypeToken<List<String>>(){}.getType());
          } catch (JsonSyntaxException jse) {
            // Swallow this at the behest of still trying to POST
            LOG.debug("Exception deserializing the json data on live " +
              "collector nodes.", jse);
          }
        }
      } else if (responseCode == 500){
        String warnMsg = "Unable to connect to collector to find live nodes, Internal server error";
        throw new MetricCollectorUnavailableException(warnMsg);
      }
{code}
 



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