Wrong HINT during database recovery when occur a minimal wal.

From: <lchch1990(at)sina(dot)cn>
To: "pgsql-hackers" <pgsql-hackers(at)postgresql(dot)org>
Subject: Wrong HINT during database recovery when occur a minimal wal.
Date: 2021-01-15 07:19:19
Message-ID: 20210115071919.215B5464046E@webmail.sinamail.sina.com.cn
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Hello hackers,
When I do PITR in a strange step, I get this FATAL:
2021-01-15 15:02:52.364 CST [14958] FATAL: hot standby is not possible because wal_level was not set to "replica" or higher on the primary server2021-01-15 15:02:52.364 CST [14958] HINT: Either set wal_level to "replica" on the primary, or turn off hot_standby here.
The strange step is that I change wal_level to minimal after basebackup.
My question is that what's the mean of [set wal_level to "replica" on the primary] inHINT describe, I can't think over a case to solve this FATAL by set wal_level, I cansolve it by turn off hot_standby only.
Do you think we can do this code change?--- a/src/backend/access/transam/xlog.c+++ b/src/backend/access/transam/xlog.c@@ -6300,7 +6300,7 @@ CheckRequiredParameterValues(void) if (ControlFile->wal_level < WAL_LEVEL_REPLICA) ereport(ERROR, (errmsg("hot standby is not possible because wal_level was not set to \"replica\" or higher on the primary server"),- errhint("Either set wal_level to \"replica\" on the primary, or turn off hot_standby here.")));+ errhint("You should turn off hot_standby here.")));

---Regards,Highgo Software (Canada/China/Pakistan) URL : www.highgo.ca EMAIL: mailto:movead(dot)li(at)highgo(dot)ca

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