[Bug 1960617] [NEW] isc-dhcpd-4.4.1 hangs

[Yuriy Senelshchikov]

Public bug reported:

Hello,

Not long ago, I installed Ubuntu 20.04 and isc-dhcpd-4.4.1. Right after
that isc-dhcp started hanging with no respondes to DHCPDISCOVERs. Then I
updated Ubuntu to 21.10 but the issue wasn't resolved. It happens once a
1-2 days or so.

Also there isn't any logs or CPU/Memory utilisation.
tcpdump shows requests from client.
Only restarting dhcp helps.

strace output:
futex(0x7f0a1bf870d0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, NULL, FUTEX_BITSET_MATCH_ANY) = ?

** Affects: isc-dhcp (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  Hello,
  
  Not long ago, I installed Ubuntu 20.04 and isc-dhcpd-4.4.1. Right after
  that isc-dhcp started hanging with no respondes to DHCPDISCOVERs. Then I
- updated Ubuntu to 21.10 but the issue wasn't resolved.
+ updated Ubuntu to 21.10 but the issue wasn't resolved. It happens once a
+ 1-2 days or so.
  
  Also there isn't any logs or CPU/Memory utilisation.
  tcpdump shows requests from client.
  Only restarting dhcp helps.
  
- strace output: 
+ strace output:
  futex(0x7f0a1bf870d0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, NULL, FUTEX_BITSET_MATCH_ANY) = ?

** Description changed:

  Hello,
  
  Not long ago, I installed Ubuntu 20.04 and isc-dhcpd-4.4.1. Right after
  that isc-dhcp started hanging with no respondes to DHCPDISCOVERs. Then I
- updated Ubuntu to 21.10 but the issue wasn't resolved. It happens once a
- 1-2 days or so.
+ updated Ubuntu to 21.10 but the issue wasn't resolved. It happens once
+ at 1-2 days or so.
  
  Also there isn't any logs or CPU/Memory utilisation.
  tcpdump shows requests from client.
  Only restarting dhcp helps.
  
  strace output:
  futex(0x7f0a1bf870d0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, NULL, FUTEX_BITSET_MATCH_ANY) = ?

** Description changed:

  Hello,
  
  Not long ago, I installed Ubuntu 20.04 and isc-dhcpd-4.4.1. Right after
  that isc-dhcp started hanging with no respondes to DHCPDISCOVERs. Then I
- updated Ubuntu to 21.10 but the issue wasn't resolved. It happens once
- at 1-2 days or so.
+ updated Ubuntu to 21.10 but the issue wasn't resolved. It happens once a
+ 1-2 days or so.
  
  Also there isn't any logs or CPU/Memory utilisation.
  tcpdump shows requests from client.
  Only restarting dhcp helps.
  
  strace output:
  futex(0x7f0a1bf870d0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, NULL, FUTEX_BITSET_MATCH_ANY) = ?

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to isc-dhcp in Ubuntu.
https://bugs.launchpad.net/bugs/1960617

Title:
  isc-dhcpd-4.4.1 hangs

Status in isc-dhcp package in Ubuntu:
  New

Bug description:
  Hello,

  Not long ago, I installed Ubuntu 20.04 and isc-dhcpd-4.4.1. Right
  after that isc-dhcp started hanging with no respondes to
  DHCPDISCOVERs. Then I updated Ubuntu to 21.10 but the issue wasn't
  resolved. It happens once a 1-2 days or so.

  Also there isn't any logs or CPU/Memory utilisation.
  tcpdump shows requests from client.
  Only restarting dhcp helps.

  strace output:
  futex(0x7f0a1bf870d0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, NULL, FUTEX_BITSET_MATCH_ANY) = ?

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