TiDB Cloud: ERROR 9001 (HY000) PD Server Timeout - safe point may fall behind
[PingCAP docs, Error Codes and Troubleshooting]: Generally this is slow or busy disk on PD, or a network failure between TiDB and PD. Check the PD server state, monitoring data and logs. On TiDB Cloud this is infrastructure-side, so if the TiDB console shows a healthy cluster, it is transient and retryable; persistent 9001s are worth a support ticket with the time window.
Context: TiDB Cloud queries fail with ERROR 9001 (HY000): PD server timeout; start timestamp may fall behind safe point. A TiDB background worker continuously queries the safepoint from PD and reports this error when it fails for 100 seconds.Maintainer review
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