** Description changed: Ubuntu - ============== + ====== No LSB modules are available. Description: Ubuntu 24.04.2 LTS Release: 24.04 Package - ============== + ======= isc-dhcp-client: - Installed: 4.4.3-P1-4ubuntu2 - Candidate: 4.4.3-P1-4ubuntu2 - Version table: - *** 4.4.3-P1-4ubuntu2 500 - 500 http://archive.ubuntu.com/ubuntu noble/universe amd64 Packages - 100 /var/lib/dpkg/status - + Installed: 4.4.3-P1-4ubuntu2 + Candidate: 4.4.3-P1-4ubuntu2 + Version table: + *** 4.4.3-P1-4ubuntu2 500 + 500 http://archive.ubuntu.com/ubuntu noble/universe amd64 Packages + 100 /var/lib/dpkg/status Steps to Reproduce ================== # ip l add dev dummy type dummy # ip l set dev dummy up # for i in {1..50}; do for j in {1..50}; do ip a a 192.168.$i.$j/24 dev dummy; done; done # ip -o a show dev dummy | wc -l 2500 # dhclient -v dummy Result ====== After the operations above, we can see the dhclient hanging. The top command showed the dhclient's memory was increasing, seemed a memory leak happened. - top - 01:52:58 up 12 days, 23:38, 0 user, load average: 2.46, 2.44, 2.26 Tasks: 5 total, 1 running, 2 sleeping, 2 stopped, 0 zombie %Cpu(s): 2.4 us, 1.4 sy, 0.0 ni, 96.1 id, 0.1 wa, 0.0 hi, 0.0 si, 0.0 st MiB Mem : 772016.8 total, 614728.2 free, 111628.2 used, 50758.8 buff/cache MiB Swap: 0.0 total, 0.0 free, 0.0 used. 660388.6 avail Mem - PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND - 1 root 20 0 4.5m 3.8m 3.2m S 0.0 0.0 0:00.00 bash - 10 root 20 0 4.6m 4.1m 3.4m S 0.0 0.0 0:00.59 bash - 2869 root 20 0 3.2m 1.3m 1.2m T 0.0 0.0 0:00.00 dhclient - 2870 root 20 0 188.7m 185.9m 2.3m T 0.0 0.0 2:09.55 dhclient - 2879 root 20 0 8.7m 5.0m 2.9m R 0.0 0.0 0:00.00 top + PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND + 1 root 20 0 4.5m 3.8m 3.2m S 0.0 0.0 0:00.00 bash + 10 root 20 0 4.6m 4.1m 3.4m S 0.0 0.0 0:00.59 bash + 2869 root 20 0 3.2m 1.3m 1.2m T 0.0 0.0 0:00.00 dhclient + 2870 root 20 0 188.7m 185.9m 2.3m T 0.0 0.0 2:09.55 dhclient + 2879 root 20 0 8.7m 5.0m 2.9m R 0.0 0.0 0:00.00 top
** Description changed: Ubuntu ====== No LSB modules are available. Description: Ubuntu 24.04.2 LTS Release: 24.04 Package ======= isc-dhcp-client: Installed: 4.4.3-P1-4ubuntu2 Candidate: 4.4.3-P1-4ubuntu2 Version table: *** 4.4.3-P1-4ubuntu2 500 500 http://archive.ubuntu.com/ubuntu noble/universe amd64 Packages 100 /var/lib/dpkg/status Steps to Reproduce ================== # ip l add dev dummy type dummy # ip l set dev dummy up # for i in {1..50}; do for j in {1..50}; do ip a a 192.168.$i.$j/24 dev dummy; done; done # ip -o a show dev dummy | wc -l 2500 # dhclient -v dummy Result ====== - After the operations above, we can see the dhclient hanging. The top command showed the dhclient's memory - was increasing, seemed a memory leak happened. + After the operations above, we could see the dhclient hanging. + The top command showed the dhclient's memory was increasing, + seemed a memory leak happened. Also CPU usage was pretty high. - top - 01:52:58 up 12 days, 23:38, 0 user, load average: 2.46, 2.44, 2.26 - Tasks: 5 total, 1 running, 2 sleeping, 2 stopped, 0 zombie - %Cpu(s): 2.4 us, 1.4 sy, 0.0 ni, 96.1 id, 0.1 wa, 0.0 hi, 0.0 si, 0.0 st - MiB Mem : 772016.8 total, 614728.2 free, 111628.2 used, 50758.8 buff/cache - MiB Swap: 0.0 total, 0.0 free, 0.0 used. 660388.6 avail Mem + top - 02:13:48 up 12 days, 23:59, 0 user, load average: 2.99, 2.62, 2.43 + Tasks: 5 total, 2 running, 3 sleeping, 0 stopped, 0 zombie + %Cpu(s): 1.8 us, 1.9 sy, 0.0 ni, 96.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st + MiB Mem : 772016.8 total, 614554.4 free, 111778.8 used, 50785.8 buff/cache + MiB Swap: 0.0 total, 0.0 free, 0.0 used. 660238.0 avail Mem - PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND - 1 root 20 0 4.5m 3.8m 3.2m S 0.0 0.0 0:00.00 bash - 10 root 20 0 4.6m 4.1m 3.4m S 0.0 0.0 0:00.59 bash - 2869 root 20 0 3.2m 1.3m 1.2m T 0.0 0.0 0:00.00 dhclient - 2870 root 20 0 188.7m 185.9m 2.3m T 0.0 0.0 2:09.55 dhclient - 2879 root 20 0 8.7m 5.0m 2.9m R 0.0 0.0 0:00.00 top + PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND + 2870 root 20 0 283.4m 282.3m 2.3m R 100.0 0.0 5:05.29 dhclient + 1 root 20 0 4.5m 3.8m 3.2m S 0.0 0.0 0:00.00 bash + 10 root 20 0 4.6m 4.1m 3.4m S 0.0 0.0 0:00.59 bash + 2869 root 20 0 3.2m 1.3m 1.2m S 0.0 0.0 0:00.00 dhclient + 2882 root 20 0 8.7m 5.0m 2.9m R 0.0 0.0 0:00.01 top -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/2109303 Title: dhclient hang when tons of ip addresses exist Status in isc-dhcp package in Ubuntu: New Bug description: Ubuntu ====== No LSB modules are available. Description: Ubuntu 24.04.2 LTS Release: 24.04 Package ======= isc-dhcp-client: Installed: 4.4.3-P1-4ubuntu2 Candidate: 4.4.3-P1-4ubuntu2 Version table: *** 4.4.3-P1-4ubuntu2 500 500 http://archive.ubuntu.com/ubuntu noble/universe amd64 Packages 100 /var/lib/dpkg/status Steps to Reproduce ================== # ip l add dev dummy type dummy # ip l set dev dummy up # for i in {1..50}; do for j in {1..50}; do ip a a 192.168.$i.$j/24 dev dummy; done; done # ip -o a show dev dummy | wc -l 2500 # dhclient -v dummy Result ====== After the operations above, we could see the dhclient hanging. The top command showed the dhclient's memory was increasing, seemed a memory leak happened. Also CPU usage was pretty high. top - 02:13:48 up 12 days, 23:59, 0 user, load average: 2.99, 2.62, 2.43 Tasks: 5 total, 2 running, 3 sleeping, 0 stopped, 0 zombie %Cpu(s): 1.8 us, 1.9 sy, 0.0 ni, 96.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st MiB Mem : 772016.8 total, 614554.4 free, 111778.8 used, 50785.8 buff/cache MiB Swap: 0.0 total, 0.0 free, 0.0 used. 660238.0 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2870 root 20 0 283.4m 282.3m 2.3m R 100.0 0.0 5:05.29 dhclient 1 root 20 0 4.5m 3.8m 3.2m S 0.0 0.0 0:00.00 bash 10 root 20 0 4.6m 4.1m 3.4m S 0.0 0.0 0:00.59 bash 2869 root 20 0 3.2m 1.3m 1.2m S 0.0 0.0 0:00.00 dhclient 2882 root 20 0 8.7m 5.0m 2.9m R 0.0 0.0 0:00.01 top To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/2109303/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
