Log backup Fails

  • I have full backup scheduled daily at evening 5 PM.

    Differential occurs daily after every 3 hours throughout the day.

    Log backups are scheduled after every 15 minutes.

    But the scheduled after 2 am till 3 am for log backup starts failing stating the following error:

    "BACKUP LOG cannot be performed because there is no current database backup.

    BACKUP LOG is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.

  • I got it there is job which runs at 1:45 which truncates the log and so the log backup starts failing and it resumes once differential is completed at 3:00 am after 3 am log backup are successfull.

  • This was removed by the editor as SPAM

  • mahesh.dasoni (10/30/2012)


    I got it there is job which runs at 1:45 which truncates the log and so the log backup starts failing and it resumes once differential is completed at 3:00 am after 3 am log backup are successfull.

    Don't manually truncate your log. You're breaking your log chain and reducing the options you have for restoring that DB in the case of a disaster.

    Please read through this - Managing Transaction Logs[/url]

    Gail Shaw
    Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
    SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

    We walk in the dark places no others will enter
    We stand on the bridge and no one may pass
  • you have scheduled transactional log backup then why there is job for truncate log file :blink:

    -----------------------------------------------------------------------------
    संकेत कोकणे

  • sanket kokane (10/31/2012)


    you have scheduled transactional log backup then why there is job for truncate log file :blink:

    +1

    -------Bhuvnesh----------
    I work only to learn Sql Server...though my company pays me for getting their stuff done;-)

  • hi mahesh,

    This error occurs when someone has run a process that has broken the log chain. Probably ran the command BACKUP LOG [Jul_Reports] WITH TRUNCATE_ONLY, or the database was switched to SIMPLE recovery and then back to FULL.

    if someone using backup log with truncate_only command in their job

    please set below trace flag

    3031

    3231

    it wont break lsn chain of database.

    you will get explaination for traceflag on google.

  • Hemant.R (12/12/2012)


    hi mahesh,

    This error occurs when someone has run a process that has broken the log chain. Probably ran the command BACKUP LOG [Jul_Reports] WITH TRUNCATE_ONLY, or the database was switched to SIMPLE recovery and then back to FULL.

    if someone using backup log with truncate_only command in their job

    please set below trace flag

    3031

    3231

    it wont break lsn chain of database.

    you will get explaination for traceflag on google.

    A month old post :hehe:

    -------Bhuvnesh----------
    I work only to learn Sql Server...though my company pays me for getting their stuff done;-)

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