Issues

• Remove deprecated API usage and prevent regressions

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

• Flaky test: ScheduledExecutorsTest.testscheduleWithFixedDelay

  Flaky test
  apache/druid#20503 · Filter by author FrankChen021 opened on Oct 7, 2026
  1

• 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

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

• CI infra: apache-rat-plugin 0.18 check fails intermittently in parallel packaging-check build

  Flaky test
  apache/druid#20465 · Filter by author FrankChen021 opened on Oct 1, 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})

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

• Flaky test: IngestionSmokeTest.test_streamLogs_ofCancelledTask (ConsulDiscoveryPlainDockerTest)

  Flaky test
  apache/druid#20435 · Filter by author FrankChen021 opened on Sep 26, 2026

• Flaky test: KinesisFaultToleranceTest.test_supervisorRecovers_afterChangeInTopicPartitions_withEmptyShards

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

• Flaky test: KinesisFaultToleranceTest.test_supervisorRecovers_afterSuspendResume_withEmptyShards

  Flaky test
  apache/druid#20433 · Filter by author FrankChen021 opened on Sep 26, 2026
  1

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

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

• 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

• Partial segment loading: bootstrap-restored cache entries can fail to download after restart (reused BootstrapRangeReader throws)

  apache/druid#19680 · Filter by author qgambit2 opened on Jul 13, 2026

• Backport workflow-hardening fix (unpinned-uses) to 5 release branches

  apache/druid#19634 · Filter by author CharlieMCY opened on Jun 29, 2026
  1

• Druid 37.0.0: EXTERN parquet from S3 fails with java.io.IOException: No such file or directory

  Uncategorized problem report
  apache/druid#19619 · Filter by author sadyuri opened on Jun 23, 2026