> Ok thank you,
>
> I have promoted slave server as master in postgres streaming replication , howerver application is working fine after
promotion, but getting some error messages in the postgres log (slave which promoted to master)
>
> what does it mean?
>
> <tag>
>>ERROR: could not obtain lock on row in relation "main_instance"
> < 2017-09-05 13:08:45.434 UTC >STATEMENT: SELECT "main_instance"."id", "main_instance"."uuid",
"main_instance"."hostname","main_instance"."created", "main_instance"."modified", "main_instance"."version",
"main_instance"."capacity"FROM "main_instance" LIMIT 1 FOR UPDATE NOWAIT
Your session (transction) tried to get a row lock on the row but other
session (transaction) has already gotten the row lock on the same row.
Best regards,
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese:http://www.sraoss.co.jp
