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57ce00a5c6
Commit 83da33d8cf
removed NFS directory delete retries. It was made on assumption, that
only directory rename could cause such issues. However, both rename and
unlink uses the same "silly rename" logic
https://linux-nfs.org/wiki/index.php/Server-side_silly_rename
and linux kernel - `fs/nfs/dir.c` `nfs_unlink` and `nfs_rename`.
And NFS client may treat file still open, even if it
was properly closed by application. Most probably it could be triggered, because VictoriaMetrics may
open the same file multiple times ( data read and background merges).
There is no issue with VictoriaMetrics itself, it properly closes files. But NFS-client may have delays
or cache metadata information for the files. So it could trigger silly rename behavior.
This commit restores original behavior with deletion retries and brings
back metrics for unsuccessful delete operations.
Fixes https://github.com/VictoriaMetrics/VictoriaMetrics/issues/9842