[server] Add metrics of log startOffset#3229
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luoyuxia merged 3 commits intoapache:mainfrom May 8, 2026
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luoyuxia
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May 8, 2026
| } | ||
| MetricGroup metricGroup = bucketMetricGroup.addGroup("remoteLog"); | ||
| metricGroup.gauge(MetricNames.LOG_NUM_SEGMENTS, () -> numRemoteLogSegments); | ||
| metricGroup.gauge(MetricNames.LOG_START_OFFSET, () -> remoteLogStartOffset); |
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also update the monitor-metrics doc
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when no remote log, remoteLogStartOffset will be Long.MAX_VALUE, which will be werid, I think maybe we can use -1 for metric report?
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when no remote log, remoteLogStartOffset will be Long.MAX_VALUE, which will be werid, I think maybe we can use -1 for metric report?
make sense!
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updated. |
luoyuxia
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May 8, 2026
| } | ||
| MetricGroup metricGroup = bucketMetricGroup.addGroup("remoteLog"); | ||
| metricGroup.gauge(MetricNames.LOG_NUM_SEGMENTS, () -> numRemoteLogSegments); | ||
| metricGroup.gauge(MetricNames.LOG_START_OFFSET, this::getRemoteLogStartOffsetForMetric); |
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nit: how about use lambda to inline it:
() -> {
if (remoteLogStartOffset == INIT_REMOTE_LOG_START_OFFSET) {
return -1L;
}
return remoteLogStartOffset;
}
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Purpose
Linked issue: #3228 .
When the outOfRange exception, I hope I can find the tablet log startOffset from the metric system.
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