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Posted to user@cassandra.apache.org by Alexander Nikolaev via user <us...@cassandra.apache.org> on 2022/09/29 07:07:57 UTC

Creating .lock files in /tmp folder during backup

Hello, folks!

I use "cassandra medusa" backup tool and I noticed some issues on some nodes during creating backup. Maybe somebody can help with it?During the backup in the /tmp folder creating a lot of files:


-rw-r--r-- 1 root        root         0 Sep 28 02:11 ffefd10391fbe8b8feb77656c582d3175a0135a63706bdb40fd45ca36e1bdfb7.lock
-rw-r--r-- 1 root        root         0 Sep 28 02:10 fff0600e2ed9312f2a2c2e5105a7d59954bc7f3879659cf8cb0654e0270c77e0.lock
-rw-r--r-- 1 root        root         0 Sep 28 02:56 fff1308a15f7fe8e3e520681f2d080233884ec3a080f8bff2653bc734d318447.lock
-rw-r--r-- 1 root        root         0 Sep 28 02:47 fff13f18e2b3fbc01fa02af91b9da9c4238147d88a50f7a78e710d13544b3d95.lock
-rw-r--r-- 1 root        root         0 Sep 28 02:33 fff84d7a44d81e2ac67dca5ece7076db9642c3345848253d735dab7f418bf50f.lock
-rw-r--r-- 1 root        root         0 Sep 29 02:38 fffae393486cc3d2e1e6f784948ba771067d2d062cf965a2ecedb9be8647eb20.lock
-rw-r--r-- 1 root        root         0 Sep 28 02:05 fffb2fa3ef45676f79ab9e399641dcbc15dc2b39e48825fae172f83c086dcae3.lock
-rw-r--r-- 1 root        root         0 Sep 29 03:00 fffdab6d1b83675e03501ac06e28875f13b6cfa48eb3686237b48eeda3609b97.lock
-rw-r--r-- 1 root        root         0 Sep 28 02:34 ffff24c8e8a1bea11addcff64dfb06511f0e940f0e95bdfda15ddef9579d0b0a.lock

There are could be thousands .lock files with zero size. And I don't have any other affects.
Only 2 nodes have this behaviour, others all good. Although, there are same configs and versions medusa & cassandra on nodes. Medusa 0.5.1, Cassandra 3.11.12

Any ideas what could be the reason of this? Thanks in advance!

With Best Regards, Alexander