Package: general Followup-For: Bug #932769 Could you privide a recipe on how to reproduce this? There's a lot of very special setup below, that someone wwould need large amounts of time to reporoduce I feel.
Is it possible to reduce the problem to something easily demonstratable? This seems to be an important issue to me. I think the problem here *might* be a kernel problem? Re-assign this to kernel package? When you say that it DoS'es the server then what does "top" say? What is being DoS'ed? Is it the CPU? *t It would be truly cool, if you could provide more infos. *t > To: Debian Bug Tracking System <sub...@bugs.debian.org> > Subject: general: DHCP request bug when storage lost > Date: Mon, 22 Jul 2019 14:48:00 -0600 > > Package: general > Severity: important > Tags: l10n > > Dear Maintainer, > > While doing unrelated storage testing for our VMware integrated product, we > purposefully recreated > a storage outage by removing the iSCSI initiators from the backing array > hosting the vmdk disk > images for the virtual machine. > > Upon removal of uplinks to storage, the VM goes into a R/O file system state > after 5-10 minutes. > When storage initiators are brought back up and the LUNs are rescanned, the > VM begins to > rapidly request DHCP leases from an ISC DHCP server. This DoS's the server > in a way due > to the number of DHCPDECLINE errors, and the interface attempts to take and > discard IP's in a > rapid fashion. > > This only seems to appear on this distribution, and I can't replicate the > behavior on Debian 9 > or in a desktop environment. > > > > -- System Information: > Debian Release: 10.0 > APT prefers stable > APT policy: (500, 'stable') > Architecture: amd64 (x86_64) > > Kernel: Linux 4.19.0-5-amd64 (SMP w/1 CPU core) > Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), > LANGUAGE=en_US.UTF-8 (charmap=UTF-8) > Shell: /bin/sh linked to /usr/bin/dash > Init: systemd (via /run/systemd/system) > LSM: AppArmor: enabled -- System Information: Debian Release: 10.0 APT prefers stable APT policy: (500, 'stable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.19.0-5-amd64 (SMP w/8 CPU cores) Locale: LANG=de_CH.utf8, LC_CTYPE=de_CH.utf8 (charmap=UTF-8), LANGUAGE=de_CH:de (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled