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This topic has been translated from a Chinese forum by GPT and might contain errors.Original topic: PD相关问题：跨k8s集群同步+placement-rule的数据同步故障处理
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username: Mars_dai
[TiDB Usage Environment] Production Environment
[TiDB Version] V4.0.9
[Reproduction Path] Online migration issue, currently occurring
[Encountered Problem: Problem Phenomenon and Impact] Unable to migrate, potential data loss
[Resource Configuration] Go to TiDB Dashboard - Cluster Info - Hosts, screenshot this page
[Attachment: Screenshot/Log/Monitoring]