Error 17053 Severity 16 State 1. Sql Server
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Error 17054 Severity 16 State 1 Sql Server 2008
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Randal Posted on: January 30, 2008 4:26 am This is a post I've been meaning to do for a while - detailing some of the problems you can run into operating system error 665 when using database snapshots. Reverting to a snapshot Many people use snapshots as create a database snapshot (transact-sql) a way of protecting against mistakes during a complicated set of changes to a database - you can just revert to a database snapshot cannot be created because it failed to start dbcc checkdb the snapshot if something goes wrong. However, reverting to a snapshot has a little-known (but documented) problem. Let's see. I'm going to create a database plus a snapshot of it and then start taking https://support.microsoft.com/en-us/kb/926070 backups. CREATE DATABASE [SnapshotTest]; GO ALTER DATABASE [SnapshotTest] SET RECOVERY FULL; GO BACKUP DATABASE [SnapshotTest] TO DISK = N'C:\SQLskills\SnapshotTest.bak' WITH INIT; GO CREATE TABLE [SnapshotTest].[dbo].[MyTable] ([c1] INT); GO BACKUP LOG [SnapshotTest] TO DISK = N'C:\SQLskills\SnapshotTest_log.bak' WITH INIT; GO -- Imagine a bunch of things happen here -- Create the snapshot database, by first checking which files exist SELECT * FROM [SnapshotTest].[sys].[database_files]; GO CREATE DATABASE [ST_Snap] ON (NAME = N'SnapshotTest', http://www.sqlskills.com/blogs/paul/database-snapshots-when-things-go-wrong/ FILENAME = N'C:\SQLskills\SnapshotTest_snap.snp') AS SNAPSHOT OF [SnapshotTest]; GO Now I'm going to do some stuff that's a mistake: DROP TABLE [SnapshotTest].[dbo].[MyTable]; GO Not a problem as I can revert to my database snapshot: RESTORE DATABASE [SnapshotTest] FROM DATABASE_SNAPSHOT = N'ST_Snap'; GO Oops! I forgot to take a log backup to capture everything that happened since the last log backup… BACKUP LOG [SnapshotTest] TO DISK = N'C:\SQLskills\SnapshotTest_log.bak'; GO Msg 4214, Level 16, State 1, Line 1 BACKUP LOG cannot be performed because there is no current database backup. Msg 3013, Level 16, State 1, Line 1 BACKUP LOG is terminating abnormally. Reverting to a snapshot rebuilds the transaction log and breaks the log backup chain. The only thing I can do is take a full or differential backup and then start taking log backups again. So - I lost the ability to do point-in-time restores in the period from the last log backup to the time when I reverted to the snapshot. So how can I tell when the database was reverted? Books Online documents that the restorehistory table in msdb should have an entry with restore_type = ‘R'. Let's try: SELECT * FROM [msdb].[dbo].[restorehistory] WHERE [destination_database_name] = N'SnapshotTest'; GO Nope - nothing. That f
Recent PostsRecent Posts Popular TopicsPopular Topics Home Search Members Calendar Who's On Home » SQL Server 2008 » Data Corruption (SS2K8 / SS2K8 R2) » corruption of http://www.sqlservercentral.com/Forums/Topic1344952-2893-1.aspx writing log buffer corruption of writing log buffer Rate Topic Display Mode Topic Options Author Message Oracle_91Oracle_91 Posted Tuesday, August 14, 2012 12:23 PM Right there with Babe Group: General Forum Members Last Login: Wednesday, November 12, 2014 11:36 AM Points: 774, Visits: 1,742 Hi All, What is this error ? any idea why do we see such kind of errors?LogWriter: Operating system error 170(The requested resource is in use.) encountered.Error: severity 16 17053, Severity: 16, State: 1.LogWriter: Operating system error 170(The requested resource is in use.) encountered.Write error during log flush.Error: 9001, Severity: 21, State: 4.The log for database 'msdb' is not available. Check the event log for related error messages. Resolve any errors and restart the database.Database msdb was shutdown due to error 9001 in routine 'XdesRMFull::Commit'. Restart for non-snapshot databases will be attempted after all connections to the database are aborted.Thanks in severity 16 state Advance. Post #1344952 Lynn PettisLynn Pettis Posted Tuesday, August 14, 2012 12:29 PM SSC-Insane Group: General Forum Members Last Login: 2 days ago @ 8:11 PM Points: 23,393, Visits: 37,418 Oracle_91 (8/14/2012)Hi All, What is this error ? any idea why do we see such kind of errors?LogWriter: Operating system error 170(The requested resource is in use.) encountered.Error: 17053, Severity: 16, State: 1.LogWriter: Operating system error 170(The requested resource is in use.) encountered.Write error during log flush.Error: 9001, Severity: 21, State: 4.The log for database 'msdb' is not available. Check the event log for related error messages. Resolve any errors and restart the database.Database msdb was shutdown due to error 9001 in routine 'XdesRMFull::Commit'. Restart for non-snapshot databases will be attempted after all connections to the database are aborted.Thanks in Advance.And what error(s) are shown in the event log? Lynn PettisFor better assistance in answering your questions, click hereFor tips to get better help with Performance Problems, click hereFor Running Totals and its variations, click here or when working with partitioned tablesFor more about Tally Tables, click hereFor more about Cross Tabs and Pivots, click here and hereManaging Transaction LogsSQL Musings from the Desert Fountain Valley SQL (My Mirror Blog) Post #1344957 Oracle_91Oracle_91 Posted Tuesday, August 14, 2012 5:39 PM Right there