Mohammad Arshad created AMBARI-25998:
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Summary: Host uuid is not getting synced to other collectors,
causing NPE while accessing metric
Key: AMBARI-25998
URL: https://issues.apache.org/jira/browse/AMBARI-25998
Project: Ambari
Issue Type: Bug
Components: ambari-metrics
Affects Versions: metrics-3.0.0
Reporter: Mohammad Arshad
Assignee: Mohammad Arshad
Host uuid is not getting synced with other collectors, causing NPE while
accessing metric
{code:java}
java.lang.NullPointerException
at
org.apache.ambari.metrics.core.timeline.PhoenixHBaseAccessor.getLastTimelineMetricFromResultSet(PhoenixHBaseAccessor.java:457)
at
org.apache.ambari.metrics.core.timeline.PhoenixHBaseAccessor.getLatestMetricRecords(PhoenixHBaseAccessor.java:1150)
at
org.apache.ambari.metrics.core.timeline.PhoenixHBaseAccessor.getMetricRecords(PhoenixHBaseAccessor.java:966)
at
org.apache.ambari.metrics.core.timeline.HBaseTimelineMetricsService.getTimelineMetrics(HBaseTimelineMetricsService.java:294)
at
org.apache.ambari.metrics.webapp.TimelineWebServices.getTimelineMetrics(TimelineWebServices.java:267)
{code}
*Steps to reproduce the issue*
1. Push below metrics through collector-1
{noformat}
{
"metrics": [
{
"metricname": "cpu1",
"appid": "app1",
"hostname": "host1",
"starttime": 1693294119309,
"metrics": {
"1693294119309": 100,
"1693294129309": 200
}
}
]
}
{noformat}
After metadata sync interval elapsed, performed following operations
2. GET http://COLLECTOR-1-HOST:6188/ws/v1/timeline/metrics/hosts returned
{noformat}
{
"host1": [
"app1"
],
...
}
{noformat}
3. GET http://COLLECTOR-2-HOST:6188/ws/v1/timeline/metrics/hosts returned
{
"host1": [
"app1"
],
...
}
4. GET
http://COLLECTOR-1-HOST:6188/ws/v1/timeline/metrics?metricNames=cpu1&appId=app1&hostname=host1
returned
{
"metrics": [
{
"metricname": "cpu1",
"appid": "app1",
"hostname": "host1",
"timestamp": 0,
"starttime": 1693294119309,
"metrics": {
"1693294129309": 200.0
},
"metadata": {}
}
]
}
5. GET
http://COLLECTOR-2-HOST:6188/ws/v1/timeline/metrics?metricNames=cpu1&appId=app1&hostname=host1
returned
{noformat}
{
"exception": "NullPointerException",
"javaClassName": "java.lang.NullPointerException"
}
{noformat}
When host name is being synced, host id also should be synced to fix this issue.
Similar to this issue another issue
https://issues.apache.org/jira/browse/AMBARI-25963 was raised, but that NPE was
because metrics uuid was not synced, this issue is because of host uuid is not
synced.
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