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TiDB 6.5.5 Release Notes

Release date: September 21, 2023

TiDB version: 6.5.5

Quick access: Quick start | Production deployment | Installation packages


Bug fixes

  • TiDB

    • Fix the issue that Stale Read might select an unavailable replica #46198 @zyguan
    • Fix the issue that additional overhead is incurred due to the incompatibility between Stale Read and Schema Cache #43481 @crazycs520
  • TiKV

    • Fix the issue that TiKV fails to start when Titan is enabled and the Blob file deleted twice error occurs #15454 @Connor1996
    • Fix the issue that Online Unsafe Recovery cannot handle merge abort #15580 @v01dstar
  • PD

    • Fix the issue that the scheduler takes a long time to start up #6920 @HuSharp
    • Fix the issue that the logic for handling Leaders and Peers in Scatter Region is inconsistent #6962 @bufferflies
    • Fix the issue that the empty-region-count monitoring metric is abnormal when the cluster is restarted or the PD Leader is switched #7008 @CabinfeverB
  • Tools

    • Backup & Restore (BR)

      • Fix the issue that restoring implicit primary keys by PITR might lead to conflicts #46520 @3pointer
      • Fix the issue that an error occurs when PITR recovers the meta-kv #46578 @Leavrth
      • Fix an error in BR integration test cases #46561 @purelind
      • Fix the issue that PITR fails to restore data from GCS #47022 @Leavrth
    • TiCDC

      • Fix the issue of high TiCDC replication latency caused by network isolation of PD nodes #9565 @asddongmen
      • Fix the issue that TiCDC incorrectly changes the UPDATE operation to INSERT when using the CSV format #9658 @3AceShowHand
      • Fix the issue that user passwords are recorded in some logs #9690 @sdojjy
      • Fix the issue that using the SASL authentication might cause TiCDC to panic #9669 @sdojjy
      • Fix the issue that TiCDC replication tasks might fail in some corner cases #9685 #9697 #9695 #9736 @hicqu @CharlesCheung96
      • Fix the issue that TiCDC cannot recover quickly from TiKV node failures when there are a lot of Regions upstream #9741 @sdojjy
    • TiDB Lightning

      • Fix the issue that TiDB Lightning fails to start when TiCDC is deployed on the target server #41040 @lance6716
      • Fix the issue that TiDB Lightning fails to start when PD topology is changed #46688 @lance6716
      • Fix the issue that TiDB Lightning cannot continue importing data after PD switching Leaders #46540 @lance6716
      • Fix the issue that precheck cannot accurately detect the presence of a running TiCDC in the target cluster #41040 @lance6716
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