Error when using a full disk for dedicated storage of maildir folder

[fredleger]

When trying to use mailhog in a kuebernetes cluster i noticed the following error.

Steps to reproduce:

• Under linux format a file system (this will create a lost+found folder) using ext4 (ex: /data)
• Use this FS as the Mailhog main maildir Mailhog -maildir-path /data
• try to access the mailhog API or Web UI (this will produce an error

Traces:

[mailhog-7c99fd689d-jgxlj] '
 mailhog-7c99fd689d-jgxlj] 2019/03/14 16:54:28 Parsing Content from string: 'Date: Thu, 14 Mar 2019 17:44:28 +0100
 mailhog-7c99fd689d-jgxlj] To: contact@webofmars.com
 mailhog-7c99fd689d-jgxlj] From: beta@streax.io
 mailhog-7c99fd689d-jgxlj] Subject: test Thu, 14 Mar 2019 17:44:28 +0100
 mailhog-7c99fd689d-jgxlj] Message-Id: <20190314174428.036078@localhost>
 mailhog-7c99fd689d-jgxlj] X-Mailer: swaks v20170101.0 jetmore.org/john/code/swaks/
 mailhog-7c99fd689d-jgxlj]
 mailhog-7c99fd689d-jgxlj] This is a test mailing
[mailhog-7c99fd689d-jgxlj]
[mailhog-7c99fd689d-jgxlj] '
[mailhog-7c99fd689d-jgxlj] 2019/03/14 16:54:28 http: panic serving 127.0.0.1:60956: read /data/lost+found: is a directory
[mailhog-7c99fd689d-jgxlj] goroutine 224 [running]:
[mailhog-7c99fd689d-jgxlj] net/http.(*conn).serve.func1(0xc820132180)
[mailhog-7c99fd689d-jgxlj]  /usr/lib/go/src/net/http/server.go:1389 +0xc1
[mailhog-7c99fd689d-jgxlj] panic(0x913ae0, 0xc820124990)
[mailhog-7c99fd689d-jgxlj]  /usr/lib/go/src/runtime/panic.go:443 +0x4e9
[mailhog-7c99fd689d-jgxlj] github.com/mailhog/MailHog/vendor/github.com/mailhog/MailHog-Server/api.(*APIv2).messages(0xc8201aa6e0, 0x7eff6e0ef8c0, 0xc8201201a0, 0xc8201402a0)
[mailhog-7c99fd689d-jgxlj]  /root/gocode/src/github.com/mailhog/MailHog/vendor/github.com/mailhog/MailHog-Server/api/v2.go:110 +0x22d
[mailhog-7c99fd689d-jgxlj] github.com/mailhog/MailHog/vendor/github.com/mailhog/MailHog-Server/api.(*APIv2).(github.com/mailhog/MailHog/vendor/github.com/mailhog/MailHog-Server/api.messages)-fm(0x7eff6e0ef8c0, 0xc8201201a0, 0xc8201402a0)
[mailhog-7c99fd689d-jgxlj]  /root/gocode/src/github.com/mailhog/MailHog/vendor/github.com/mailhog/MailHog-Server/api/v2.go:34 +0x3e
[mailhog-7c99fd689d-jgxlj] net/http.HandlerFunc.ServeHTTP(0xc8201b8890, 0x7eff6e0ef8c0, 0xc8201201a0, 0xc8201402a0)
[mailhog-7c99fd689d-jgxlj]  /usr/lib/go/src/net/http/server.go:1618 +0x3a
[mailhog-7c99fd689d-jgxlj] github.com/mailhog/MailHog/vendor/github.com/gorilla/pat.(*Router).ServeHTTP(0xc820126000, 0x7eff6e0ef8c0, 0xc8201201a0, 0xc8201402a0)
[mailhog-7c99fd689d-jgxlj]  /root/gocode/src/github.com/mailhog/MailHog/vendor/github.com/gorilla/pat/pat.go:92 +0x26e
[mailhog-7c99fd689d-jgxlj] github.com/mailhog/MailHog/vendor/github.com/mailhog/http.BasicAuthHandler.func1(0x7eff6e0ef8c0, 0xc8201201a0, 0xc8201402a0)
[mailhog-7c99fd689d-jgxlj]  /root/gocode/src/github.com/mailhog/MailHog/vendor/github.com/mailhog/http/server.go:92 +0xfd
[mailhog-7c99fd689d-jgxlj] net/http.HandlerFunc.ServeHTTP(0xc8201ab4e0, 0x7eff6e0ef8c0, 0xc8201201a0, 0xc8201402a0)
[mailhog-7c99fd689d-jgxlj]  /usr/lib/go/src/net/http/server.go:1618 +0x3a
[mailhog-7c99fd689d-jgxlj] net/http.serverHandler.ServeHTTP(0xc8201e0080, 0x7eff6e0ef8c0, 0xc8201201a0, 0xc8201402a0)
[mailhog-7c99fd689d-jgxlj]  /usr/lib/go/src/net/http/server.go:2081 +0x19e
[mailhog-7c99fd689d-jgxlj] net/http.(*conn).serve(0xc820132180)
[mailhog-7c99fd689d-jgxlj]  /usr/lib/go/src/net/http/server.go:1472 +0xf2e
[mailhog-7c99fd689d-jgxlj] created by net/http.(*Server).Serve
[mailhog-7c99fd689d-jgxlj]  /usr/lib/go/src/net/http/server.go:2137 +0x44e
[mailhog-7c99fd689d-jgxlj] 2019/03/14 16:54:28 [SMTP 51.83.14.10:48886] Starting session

Workaround :

rm -rf /data/lost\+found

[fredleger]

Actually any folder created in maildir will produce the error. I would suggest to just skip folders if thsi is possible