How to fix the error: The transaction log for database is full due to 'log_backup'.

Question

How to fix the error: The transaction log for database is full due to 'log_backup'.

Bikram Sana 20

Hi Team,

I am getting the below error:

The transaction log for database is full due to 'log_backup'.

Whereas SQL Always on Clustering has configured and for testing purpose we are monitoring for few days that is working or not properly even no transaction is running. Therefore, why log is getting full automatically??

Please assist me.

SSingh-MSFT 16,461 Reputation points Moderator

2023-05-11T05:56:25.0333333+00:00

Hi Bikram Sana •,

Just checking in to see if the below answers helped. If this answers your query, do click Accept Answer and Mark Helpful for the same. And, if you have any further query do let us know.
LiHongMSFT-4306 31,621 Reputation points

2023-05-19T08:28:06.52+00:00

Hi @Bikram Sana

We haven't heard any response from you yet.

Is this issue solved now? If you have any questions, please feel free to share with us.

And don't forget to accept the answers if they helped. Your action would be helpful to other users who encounter the same issue and read this thread.

Thanks for your understanding!
Tarek Salha 1 Reputation point

2024-06-25T18:50:42.32+00:00

Hey guys, the answer of @Olaf Helper was super helpful to solve the problem. I Wasn't aware, that my target database was accidentally in full recovery model, which is not helpful for a data warehouse staging database. Setting it to simple recovery solved the issue for me. Of course, if FULL Recovery model is necessary, regular log backups depending on the load patterns are necessary to solve the issue.

4 answers

Your answer

SSingh-MSFT 16,461 Reputation points Moderator

2023-05-11T05:56:25.0333333+00:00

Hi Bikram Sana •,

Just checking in to see if the below answers helped. If this answers your query, do click Accept Answer and Mark Helpful for the same. And, if you have any further query do let us know.
LiHongMSFT-4306 31,621 Reputation points

2023-05-19T08:28:06.52+00:00

Hi @Bikram Sana

We haven't heard any response from you yet.

Is this issue solved now? If you have any questions, please feel free to share with us.

And don't forget to accept the answers if they helped. Your action would be helpful to other users who encounter the same issue and read this thread.

Thanks for your understanding!
Tarek Salha 1 Reputation point

2024-06-25T18:50:42.32+00:00

Hey guys, the answer of @Olaf Helper was super helpful to solve the problem. I Wasn't aware, that my target database was accidentally in full recovery model, which is not helpful for a data warehouse staging database. Setting it to simple recovery solved the issue for me. Of course, if FULL Recovery model is necessary, regular log backups depending on the load patterns are necessary to solve the issue.

Answer 1

Hi @Bikram Sana

Referring to this similar thread: How to fix this 'The transaction log for database 'Search_Service_DB' is full due to 'LOG_BACKUP'.?

SQL Server Database Engine issues this 9002 error when the transaction log becomes full. To avoid it in the future, you can use the methods below:

Backing up the log.
Freeing disk space so that the log can automatically grow.
Moving the log file to a disk drive with sufficient space.
Increasing the size of a log file.
Adding a log file on a different disk.
Completing or killing a long-running transaction.

More information: Troubleshoot a Full Transaction Log (SQL Server Error 9002)

Best regards,

Cosmog Hong

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Answer 2

RahulRandive 10,506

Hi @Bikram Sana

Thanks for your question.

When the transaction log becomes full due to 'LOG_BACKUP'

Gnerally SQL Server Database Engine issues a 9002 error.

Please find below general recommendations when you are working with transaction log files issue. I hope those would be helpful to mitigate such issue.
Manage the size of the transaction log file

Let us know if this help or if you have any additional question.

Thank you!

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Answer 3

Erland Sommarskog 134.1K MVP Volunteer Moderator

we are monitoring for few days that is working or not properly even no transaction is running.

How did you ascertain that? For instance, there is no index maintenance or similar things?

You need to schedule log backups, that's seems obvious.

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Answer 4

Olaf Helper 47,616

Hi Team,

No team, this is a community forum with volunteers.

Therefore, why log is getting full automatically??

Can be caused by missing log backups, which releases the VLF, or a broken log shipning (replication). What do this query return:

select name, log_reuse_wait_desc
from sys.databases

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How to fix the error: The transaction log for database is full due to 'log_backup'.

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