Issues

• Flaky test: KafkaIndexFaultToleranceTest.test_supervisorRecovers_afterCoordinatorRestart

  Contributions WelcomeFlaky test
  apache/druid#20604 · Filter by author FrankChen021 opened on Oct 15, 2026

• Flaky test: KafkaClusterMetricsTest (test_ingest10kRows_ofSelfClusterMetrics_andVerifyValues, test_ingestClusterMetrics_withConcurrentCompactionSupervisor_andKillUnusedSegments)

  Contributions WelcomeFlaky test
  apache/druid#20603 · Filter by author FrankChen021 opened on Oct 15, 2026

• Flaky test: StreamAppenderatorTest.testSimpleIngestion

  Contributions WelcomeFlaky test
  apache/druid#20602 · Filter by author FrankChen021 opened on Oct 15, 2026

• Flaky test: EmbeddedDartReportApiTest (class hangs until 60-minute step timeout)

  Contributions WelcomeFlaky test
  apache/druid#20601 · Filter by author FrankChen021 opened on Oct 15, 2026

• Flaky test: MSQWorkerFaultToleranceTest.test_cancelledWorker_isRetried_ifFaultToleranceIsEnabled

  Contributions WelcomeFlaky test
  apache/druid#20554 · Filter by author FrankChen021 opened on Oct 11, 2026
  1

• Flaky test: EmbeddedSecureJdbcDriverTest (surefire fork exits with code 1)

  Contributions WelcomeFlaky test
  apache/druid#20551 · Filter by author FrankChen021 opened on Oct 10, 2026

• Remove deprecated API usage and prevent regressions

  Contributions Welcome
  apache/druid#20525 · Filter by author FrankChen021 opened on Oct 8, 2026

• Broker can allocate excessive processing buffers

  apache/druid#20494 · Filter by author gianm opened on Oct 6, 2026

• CI infra: packaging-check apt-get update hangs until 60-minute step timeout

  Contributions WelcomeFlaky test
  apache/druid#20473 · Filter by author FrankChen021 opened on Oct 2, 2026

• Flaky test dashboard

  Flaky test
  apache/druid#20437 · Filter by author FrankChen021 opened on Sep 26, 2026

• CI infra: Maven cannot resolve parent POM org.apache:apache (${repoOrgUrl})

  Contributions WelcomeFlaky test
  apache/druid#20436 · Filter by author FrankChen021 opened on Sep 26, 2026
  1

• Flaky test: KinesisFaultToleranceTest.test_supervisorRecovers_afterChangeInTopicPartitions_withEmptyShards

  Contributions WelcomeFlaky test
  apache/druid#20434 · Filter by author FrankChen021 opened on Sep 26, 2026
  1

• Flaky test: KinesisFaultToleranceTest.test_supervisorRecovers_afterSuspendResume_withEmptyShards

  Contributions WelcomeFlaky test
  apache/druid#20433 · Filter by author FrankChen021 opened on Sep 26, 2026
  2

• Flaky test: KubernetesClusterDockerTest (k3s pod never becomes Ready)

  Contributions WelcomeFlaky test
  apache/druid#20432 · Filter by author FrankChen021 opened on Sep 26, 2026
  1

• Batch ingestion: preserve Arrow columnar batches beyond the Iceberg reader

  apache/druid#20401 · Filter by author Shekharrajak opened on Sep 22, 2026
  2

• Overlord becomeLeader() blocks for 3 × druid.indexer.runner.syncRequestTimeout and fails leadership acquisition if a MiddleManager's discovery entry flaps during startup worker sync

  apache/druid#20339 · Filter by author aho135 opened on Sep 14, 2026
  2

• Large numeric IN predicates cause slow SQL planning

  Area - SQLPerformance
  apache/druid#20326 · Filter by author FrankChen021 opened on Sep 11, 2026
  10

• HttpRemoteTaskRunner can assign cancelled PENDING and PENDING_WORKER_ASSIGN tasks

  Bug

  apache/druid#20298 · Filter by author FrankChen021 opened on Sep 8, 2026
  1

• HttpRemoteTaskRunner: Overlord stalling on huge backlog

  Feature/Change Description
  apache/druid#20295 · Filter by author Anubhav-Roy opened on Sep 8, 2026
  1

• Add configurable metric sampling to the Kafka emitter

  Feature/Change Description
  apache/druid#20246 · Filter by author sanjayk9r opened on Sep 3, 2026
  1

• Support Apache Ozone as Deep Storage

  Feature/Change Description
  apache/druid#20224 · Filter by author maron546 opened on Sep 1, 2026
  1

• TypeError: Cannot read properties of undefined (reading 'map')

  apache/druid#20221 · Filter by author trendzoonlineshop-code opened on Sep 1, 2026
  2

• Reduce processing-pool queue-lock contention with a sharded task queue (druid.processing.numThreadPools)

  Feature/Change Description
  apache/druid#19937 · Filter by author rbankar7 opened on Aug 8, 2026
  5

• VirtualStorage implementation for MSQ in druid 37 causing threadpool leak causing native threads exhausted

  apache/druid#19904 · Filter by author simha03 opened on Aug 6, 2026
  4

• Improve SQL sys.tasks performance with Overlord filter and limit pushdown

  Area - QueryingFeature/Change DescriptionPerformance
  apache/druid#19902 · Filter by author FrankChen021 opened on Aug 6, 2026
  1