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Recovery causing ERROR 1062 (23000) at line 257653 in file: 'rec_DB1_016179.sql': Duplicate entry '20240' for key 'PRIMARY'
Posted by: Lee Bennett
Date: August 21, 2009 02:16AM

Hi

I am restoring serveral databases from a backup taken with mysqldump and rolling them forward by using the mysqlbinlog program to generate a list of statement for each database so that I can restore them all to the same point in time

So for the fisrt log I do:

mysqlbinlog --database=<database> --start-position=<start_position> --disable-log-bin <binary log file>

Next log files until one before last:

mysqlbinlog --database=<database> --disable-log-bin <binary log file>

Last log file:

mysqlbinlog --database=<database> --stop-position=<end_position> --disable-log-bin <binary log file>

I then redirect the output to a file with the db name and log sequnce number in it. To my mind should generate a set on statements for each database that I can use to restore the databases to the required end position. This is scripted process.

This all seems to work ok most of the time however when I run the restore sql scripts that are generated above say for the database DB1 I very often get the below error:

ERROR 1062 (23000) at line 257653 in file: 'rec_DB1_016179.sql': Duplicate entry '20240' for key 'PRIMARY'

Upom looking in the file 'rec_DB1_016179.sql' at the line '257653' the below entries appear:

#090821 4:32:52 server id 1 end_log_pos 14414683 Table_map: `codecollab`.`appstate` mapped to number 376166
#090821 4:32:52 server id 1 end_log_pos 14414759 Write_rows: table id 376166 flags: STMT_END_F

BINLOG '
ZBWOShMBAAAAPwAAAFvz2wAAAGa9BQAAAAAACmNvZGVjb2xsYWIACGFwcHN0YXRlAAoDAwMDAwMD
AwMMAAAA
ZBWOShcBAAAATAAAAKfz2wAQAGa9BQAAAAEACv//APwQTwAAkBMAADoCAABPAAAADAsAAKwAAAAA
AAAAEgAAADMAAAA6PkDCRRIAAA==
'/*!*/;
# at 14414759
#090821 4:32:52 server id 1 end_log_pos 14414786 Xid = 150552452
COMMIT/*!*/;

This is of course a straight forward primary key violation on the mentioned table.
I am somewhat confused about this at the mentioned table `codecollab`.`appstate` is not part of the database DB1 that I am restoring so why does it appear in my restore script when I specified '--database' with 'mysqlbinlog' and the database is not 'codecollab'. Also what are the entries after the BINLOG statement? This happens very often during the restore.

Any ideas?

Thanks
Lee

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Recovery causing ERROR 1062 (23000) at line 257653 in file: 'rec_DB1_016179.sql': Duplicate entry '20240' for key 'PRIMARY'
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August 21, 2009 02:16AM


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