What is wait state FFT_NSO_FILEOBJECT

  • Google is just not helping me. I've been trying to access the file table shares exposed on a server (I can select, delete, update, etc via SQL) via untransacted access with no luck (the share just sits there doing something when I try to access it, no error message of any kind).

    So I thought I'd look to see if there were any open file handles via

    SELECT * FROM sys.dm_filestream_non_transacted_handles;

    I found there were 10 non transacted handles open, and they've been open for 3 days for automated processes and the files are about 1-2Kb in size.

    so I tried to kill them via

    exec sp_kill_filestream_non_transacted_handles

    that's normally not something that takes very long (in fact when I cleared two for a different database it took just a second or two).

    so leaving the stored proc running, I figured I'd connect and fire up Adam Mechanic's sp_whoisactive.

    I see the processes to kill the open file handles, with a wait state of FFT_NSO_FILEOBJECT

    Googling that brings back virtually no results, so any idea what this wait state is about?



    --Mark Tassin
    MCITP - SQL Server DBA
    Proud member of the Anti-RBAR alliance.
    For help with Performance click this link[/url]
    For tips on how to post your problems[/url]

  • Mark,

    I did some asking around and it looks like you should contact CSS to get an answer as they may need a mini-dump of the SQL Server process.

  • So it popped back up and in way larger force with SQL 2014... I've now opened a premier support ticket.

    Whatever this problem is... it also prevents database Restores (backups seem to work).

    Restores will get to 100% complete and just hang there. If I try to stop the restore query it will just cycle...

    And I'll have a new Wait state FFT_NSO_DBLIST



    --Mark Tassin
    MCITP - SQL Server DBA
    Proud member of the Anti-RBAR alliance.
    For help with Performance click this link[/url]
    For tips on how to post your problems[/url]

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