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https://issues.apache.org/jira/browse/CASSANDRA-19403?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jakub Zytka updated CASSANDRA-19403:
------------------------------------
Bug Category: Parent values: Correctness(12982)Level 1 values: API /
Semantic Implementation(12988)
Discovered By: Unit Test
Severity: Low
> system keyspace accesses are counted towards ClientRequestMetrics
> -----------------------------------------------------------------
>
> Key: CASSANDRA-19403
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19403
> Project: Cassandra
> Issue Type: Bug
> Components: Observability/Metrics
> Reporter: Jakub Zytka
> Priority: Low
>
> Mutating system keyspaces by the internal processes bumps
> ClientRequestMetrics.
> For example, creating a MV makes updates to
> `system_distributed.view_build_status`.
> Changing status of MV building will be counted towards writeMetrics.
> Example stacktrace of MV build status update, which triggers
> StorageProxy.mutate which unconditionally bumps (client) `writeMetrics`:
> {{ at
> org.apache.cassandra.service.StorageProxy.mutate(StorageProxy.java:1095)}}
> {{ at
> org.apache.cassandra.service.StorageProxy.mutateWithTriggers(StorageProxy.java:1290)}}
> {{ at
> org.apache.cassandra.cql3.statements.ModificationStatement.executeWithoutCondition(ModificationStatement.java:503)}}
> {{ at
> org.apache.cassandra.cql3.statements.ModificationStatement.execute(ModificationStatement.java:483)}}
> {{ at
> org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:290)}}
> {{ at
> org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:400)}}
> {{ at
> org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:406)}}
> {{ at
> org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:424)}}
> {{ at
> org.apache.cassandra.repair.SystemDistributedKeyspace.successfulViewBuild(SystemDistributedKeyspace.java:322)}}
> {{ at
> org.apache.cassandra.db.view.ViewBuilder.updateDistributed(ViewBuilder.java:219)}}
> {{ at
> org.apache.cassandra.db.view.ViewBuilder.finish(ViewBuilder.java:212)}}
> {{ at
> org.apache.cassandra.db.view.ViewBuilder.build(ViewBuilder.java:153)}}
> {{ at
> org.apache.cassandra.db.view.ViewBuilder$1.onSuccess(ViewBuilder.java:187)}}
> {{ at
> org.apache.cassandra.db.view.ViewBuilder$1.onSuccess(ViewBuilder.java:181)}}
> {{ at
> com.google.common.util.concurrent.Futures$CallbackListener.run(Futures.java:1062)}}
> {{ at
> com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:30)}}
> {{ at
> com.google.common.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:1138)}}
> {{ at
> com.google.common.util.concurrent.AbstractFuture.complete(AbstractFuture.java:958)}}
> {{ at
> com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:726)}}
> {{ at
> com.google.common.util.concurrent.CollectionFuture$CollectionFutureRunningState.handleAllCompleted(CollectionFuture.java:71)}}
> {{ at
> com.google.common.util.concurrent.AggregateFuture$RunningState.processCompleted(AggregateFuture.java:257)}}
> {{ at
> com.google.common.util.concurrent.AggregateFuture$RunningState.decrementCountAndMaybeComplete(AggregateFuture.java:244)}}
> {{ at
> com.google.common.util.concurrent.AggregateFuture$RunningState.access$300(AggregateFuture.java:92)}}
> {{ at
> com.google.common.util.concurrent.AggregateFuture$RunningState$1.run(AggregateFuture.java:149)}}
> {{ at
> com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:30)}}
> {{ at
> com.google.common.util.concurrent.ExecutionList.executeListener(ExecutionList.java:141)}}
> {{ at
> com.google.common.util.concurrent.ExecutionList.execute(ExecutionList.java:130)}}
> {{ at
> com.google.common.util.concurrent.ListenableFutureTask.done(ListenableFutureTask.java:86)}}
> {{ at
> java.base/java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:381)}}
> {{ at
> java.base/java.util.concurrent.FutureTask.set(FutureTask.java:232)}}
> {{ at
> java.base/java.util.concurrent.FutureTask.run(FutureTask.java:272)}}
> {{ at
> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)}}
> {{ at
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)}}
> {{ at
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)}}
> {{ at java.base/java.lang.Thread.run(Thread.java:829)}}
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