On one of my databases, the integrity check keeps failing with the error:

Connection may have been terminated by the server. [SQLSTATE HY000] Msg 596, Sev 21, State 1: Cannot continue the execution because the session is in the kill state. [SQLSTATE HY000].

There is nothing else going on that I can tell and so this is a particularly hard thing to solve. It's as if the database is timing out or something on the CheckDB command.

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    When checkdb fails, there are usually a bunch of other error messages. Have you checked event viewer or the error log? That message often appears when your drive runs out of space for the snapshot checkdb takes. – Erik Darling Jan 8 at 21:26
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    And if it is a space issue, that you can't get around, i'd check out Paul Randal's blog on breaking up VLDB. – scsimon Jan 8 at 21:42
  • Is the database in an Availability Group or Cluster? I have seen this issue on a few AGs/Clusters where there is an underlying performance problem that actually triggers failovers or partial failovers which is the cause of the killed connection. – HandyD Jan 9 at 5:43
  • Does it fail at the same time from start? If you have exhausted the other options, make sure there isn't a process that kills connections that have been alive for X minutes. Usually an agent job that someone put in to prevent long running queries from consuming all resources. – Jonathan Fite Jan 9 at 14:04
  • I am low on space. Perhaps I should increase the drive space for the database. However, when I add additional disk space it doesn't seem to matter at all. I still get the same errors. – Brian Custer Jan 12 at 2:35

I would recommend check space on data file of your database and extended in case there is only 5% free of space.

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