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ensures instrumented cache is recording stats #4552

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May 21, 2024
Merged

ensures instrumented cache is recording stats #4552

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3 changes: 3 additions & 0 deletions server/tserver/src/main/java/org/apache/accumulo/tserver/ScanServerMetrics.java
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@
import org.apache.accumulo.core.metrics.MetricsProducer;

import com.github.benmanes.caffeine.cache.LoadingCache;
import com.google.common.base.Preconditions;

import io.micrometer.core.instrument.Counter;
import io.micrometer.core.instrument.MeterRegistry;
Expand All @@ -46,6 +47,8 @@ public void registerMetrics(MeterRegistry registry) {
.description("Time to reserve a tablets files for scan").register(registry);
busyTimeoutCount = Counter.builder(METRICS_SCAN_BUSY_TIMEOUT_COUNTER)
.description("The number of scans where a busy timeout happened").register(registry);
Preconditions.checkState(tabletMetadataCache.policy().isRecordingStats(),
"Attempted to instrument cache that is not recording stats.");
CaffeineCacheMetrics.monitor(registry, tabletMetadataCache, METRICS_SCAN_TABLET_METADATA_CACHE);
}

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