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https://issues.apache.org/jira/browse/CASSANDRA-19651?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ariel Weisberg updated CASSANDRA-19651:
---------------------------------------
Status: Ready to Commit (was: Review In Progress)
> idealCLWriteLatency metric reports the worst response time instead of the
> time when ideal CL is satisfied
> ---------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-19651
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19651
> Project: Cassandra
> Issue Type: Bug
> Components: Legacy/Observability
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
> Fix For: 4.1.x, 5.0.x, 5.x
>
> Attachments:
> ci_summary-cassandra-4.0-a75f6c3e81f677e50c0a0d467dd5dad672f923e3.html,
> ci_summary-cassandra-4.1-1ed312f881c0c170c8833ff9fbf397ab8fc625cc.html,
> ci_summary-cassandra-5.0-009f2982ac88d9c9bc0a7a7d29220f055aa7f11e.html,
> ci_summary-trunk-da68729322515b4a7a698b73a0154ecdeb3abf39.html,
> result_details-cassandra-4.0-a75f6c3e81f677e50c0a0d467dd5dad672f923e3.tar.gz,
> result_details-cassandra-5.0-009f2982ac88d9c9bc0a7a7d29220f055aa7f11e.tar.gz,
> result_details-trunk-da68729322515b4a7a698b73a0154ecdeb3abf39.tar.gz,
> select-junit-tests-rerun-4.1.zip
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> org.apache.cassandra.service.AbstractWriteResponseHandler:
> {code:java}
> private final void decrementResponseOrExpired()
> {
> int decrementedValue = responsesAndExpirations.decrementAndGet();
> if (decrementedValue == 0)
> {
> // The condition being signaled is a valid proxy for the CL being
> achieved
> // Only mark it as failed if the requested CL was achieved.
> if (!condition.isSignalled() && requestedCLAchieved)
> {
> replicaPlan.keyspace().metric.writeFailedIdealCL.inc();
> }
> else
> {
>
> replicaPlan.keyspace().metric.idealCLWriteLatency.addNano(nanoTime() -
> queryStartNanoTime);
> }
> }
> } {code}
> Actual result: responsesAndExpirations is a total number of replicas across
> all DCs which does not depend on the ideal CL, so the metric value for
> replicaPlan.keyspace().metric.idealCLWriteLatency is updated when we get the
> latest response/timeout for all replicas.
> Expected result: replicaPlan.keyspace().metric.idealCLWriteLatency is updated
> when we get enough responses from replicas according to the ideal CL.
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