[systemd-bugs] [Bug 84661] New: systemd-networkd: FD leak on DHCP renewal

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84661

            Bug ID: 84661
           Summary: systemd-networkd: FD leak on DHCP renewal
           Product: systemd
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
          Assignee: systemd-bugs at lists.freedesktop.org
          Reporter: lev.cohan at gmail.com
        QA Contact: systemd-bugs at lists.freedesktop.org

Created attachment 107321
  --> https://bugs.freedesktop.org/attachment.cgi?id=107321&action=edit
systemd-networkd debug log

Since my last systemd upgrade (215 -> 216) networkd is having timeouts when
renewing my dhcp lease.

This happens every two days. The log output is at every incident the same.

Log extract:
Oct 02 09:40:51 G550 systemd-networkd[179]: Failed to save lease data
/run/systemd/netif/leases/4: Too many open files
Oct 02 09:40:51 G550 systemd-networkd[179]: extern0 : Failed to save link data
to /run/systemd/netif/links/4: Too many open files
Oct 02 09:44:15 G550 systemd[1]: systemd-networkd.service watchdog timeout
(limit 1min)!
Oct 02 09:44:15 G550 systemd[1]: Unit systemd-networkd.service entered failed
state.
Oct 02 09:44:15 G550 systemd-networkd[18244]: extern0 : gained carrier

config file:
[ext0.network]
[Match]
Name=extern0

[Network]
DHCP=yes

Two days ago I restarted systemd-networkd with
File: /etc/systemd/system/systemd-networkd.service.d/debug.conf
[Service]
Environment=SYSTEMD_LOG_LEVEL=debug

The log is added to this bug report. I only edited the addresses for reasons of
secrecy.

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