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bookie_journal_JOURNAL_QUEUE_SIZE Prometheus metric is negative (Pulsar 2.6.1)

See original GitHub issue

Describe the bug The prometheus metric bookie_journal_JOURNAL_QUEUE_SIZE exposed by bookie is negative. Shouldn’t queue lengths be positive

To Reproduce

Launch Pulsar on Kubernetes
Inspect metrics endpoint of Bookkeeper

$ curl http://platform-pulsar-bookkeeper:8000/metrics | grep QUEUE_SIZE
# TYPE bookie_journal_JOURNAL_CB_QUEUE_SIZE counter
bookie_journal_JOURNAL_CB_QUEUE_SIZE 57253790
# TYPE bookie_journal_JOURNAL_FORCE_WRITE_QUEUE_SIZE counter
bookie_journal_JOURNAL_FORCE_WRITE_QUEUE_SIZE 0
# TYPE bookie_journal_JOURNAL_QUEUE_SIZE counter
bookie_journal_JOURNAL_QUEUE_SIZE -57253790

Expected behavior Queue lengths are zero or above

Screenshots

Additional context

Pulsar 2.6.1
Kafkaesque Helm Chart 1.0.24
Probably has not bearing but exposeTopicLevelMetricsInPrometheus is set to false as we have a lot of topics

Issue Analytics

State:
Created 3 years ago
Comments:6 (4 by maintainers)

Top GitHub Comments

1reaction

michaeljmarshallcommented, Feb 23, 2021

bookie_journal_JOURNAL_CB_QUEUE_SIZE is positive (and almost the exact inverse value)

That’s a helpful observation. When I was looking through the code last night, I was wondering if there was any type of relationship between those two metrics.

0reactions

frankjkellycommented, Feb 24, 2021

@michaeljmarshall Thanks so much for hunting this down. Closing this ticket . . . .