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Noticed Cortex Query Timeout and Data Inconsistency Issues

component/querier

type/bug

Status: Open.

#7733In cortexproject/cortex;

· rmhaisane opened on Jul 27, 2026

detachChunksFromBuffer copies chunk data that Unmarshal already allocated separately (#7670)

component/querier

type/bug

Status: Open.

#7732In cortexproject/cortex;

· sandy2008 opened on Jul 27, 2026

cortex_ingester_ingestion_delay_seconds loses ~86% of observations: NativeHistogramMinResetDuration is 1ns, not 1h

type/bug

Status: Open.

#7731In cortexproject/cortex;

· sandy2008 opened on Jul 27, 2026

DNS watcher still clears all endpoints on the SRV path when target A-record lookups fail (incomplete #7698 fix)

type/bug

Status: Open.

#7730In cortexproject/cortex;

· sandy2008 opened on Jul 27, 2026

Querier crash: invalid UTF-8 in match[]/query panics the active request tracker (index out of range [-1])

type/bug

type/security

Status: Open.

#7729In cortexproject/cortex;

· sandy2008 opened on Jul 27, 2026

Querier bucket-scan blocks finder: per-tenant metas maps grow unboundedly and keep serving deleted tenants while scans keep partially failing

component/querier

type/bug

type/productionIssues related to the production use of Cortex, inc. configuration, alerting and operating.Issues related to the production use of Cortex, inc. configuration, alerting and operating.

Status: Open.

#7728In cortexproject/cortex;

· sandy2008 opened on Jul 27, 2026

Querier bucket-scan blocks finder and store-gateway wipe each other's meta-syncer cache in single-binary mode

component/querier

component/store-gateway

type/bug

Status: Open.

#7727In cortexproject/cortex;

· sandy2008 opened on Jul 27, 2026

Flaky test: TestPartitionCompactor_DeleteLocalSyncFiles (arm64) — data race in thanos extprom.TxGaugeVec via concurrent MetaFetcher.Fetch

component/compactor

type/flaky-test

Status: Open.

#7707In cortexproject/cortex;

· yeya24 opened on Jul 20, 2026

Some logs ignore the JSON log format setting

type/bug

Status: Open.

#7697In cortexproject/cortex;

· jakubgs opened on Jul 17, 2026

Flaky test: TestPartitionCompactor_ShouldCompactOnlyUsersOwnedByTheInstanceOnShardingEnabledAndMultipleInstancesRunning — 60s CompactionRunsCompleted poll times out

component/compactor

type/flaky-test

Status: Open.

#7607In cortexproject/cortex;

· sandy2008 opened on Jun 8, 2026

Flaky test: TestPrometheusMetrics_IncrementedCorrectly (pkg/util/queryeviction) — race between async eviction and evictionsTotal assertion

component/querier

type/flaky-test

Status: Open.

#7604In cortexproject/cortex;

· sandy2008 opened on Jun 8, 2026

Scheduler: FragmentTable starts a periodicCleanup goroutine/ticker that can never be stopped (no Close/Stop)

type/bug

Status: Open.

#7596In cortexproject/cortex;

· sandy2008 opened on Jun 7, 2026