Recover database after SERVER-15369

[Vlad Miller]

Hello, 

My dev database got corrupted because of this issue https://groups.google.com/forum/#!msg/mongodb-user/gPjazaAePoo/SVAmv31CwDwJ

Invariant failure _name == nsToDatabaseSubstring( ns ) src/mongo/db/catalog/database.cpp 439

Is there any way to recover it? I had only one database? Maybe I could recompile mongod and override nsToDatabaseSubstring function to return name I needed?

We spend a lot of time writing content for our app and unfortunately didn't made a backup.

[Stephen Steneker]

Hi Vlad,

I saw you also posted this question on StackOverflow and were able to restore your data by copying the db files to a new mongod instance:

  http://stackoverflow.com/questions/31184810/recover-database-after-server-15369-corruption

That sounds like an unusual fix if the data files were actually corrupted, so it seems likely there was another issue at play.

The error message you mention doesn't necessarily mean you encountered SERVER-15369. This specific issue only affects environments with:

• certain 3.x Linux kernels, including Ubuntu 12.x, 14.x, and Fedora 20; and
  
• VMWare platform, including VMWare ESXi, Fusion, and Workstation; and
  
• virtual SCSI disks managed by LVM
  

Irrespective of the issue that may have caused your error, recompiling MongoDB to ignore errors or return an "expected" result will also not help fix any underlying data corruption.

Regards,

Stephen