[IMPALA-12217] cgroup memory limit detection doesn't work for cgroups v2

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: Impala 4.3.0
• Fix Version/s: Impala 4.3.0
• Component/s: Backend
• Epic Color: ghx-label-5
• Assignee: Michael Smith
• Reporter: Joe McDonnell
• Created: 15/Jun/23 17:05
• Updated: 27/Jun/23 18:45
• Resolved: 23/Jun/23 01:11

Description

Redhat 9 and Ubuntu 22 switched to cgroups v2, which has a different hierarchy than cgroups v1. On startup, we get this error message:

I0615 03:42:54.895839 2633432 status.cc:129] Error reading /proc/self/cgroup: Error(2): No such file or directory
    @           0xfc6233  impala::Status::Status()
    @          0x17ab766  impala::CGroupUtil::FindGlobalCGroup()
    @          0x17acdb2  impala::CGroupUtil::FindAbsCGroupPath()
    @          0x17ad065  impala::CGroupUtil::FindCGroupMemLimit()
    @          0x17ad7e8  _ZN6impala10CGroupUtil11DebugStringB5cxx11Ev
    @           0xfa9ce3  impala::InitCommonRuntime()
    @          0x15978ed  ImpaladMain()
    @           0xe977dc  main
    @     0x7fada4963d90  (unknown)
    @     0x7fada4963e40  __libc_start_main
    @           0xe97635  _start
I0615 03:42:54.895812 2633432 init.cc:536] Process CGroup Info: memory.limit_in_bytes=Error reading /proc/self/cgroup: Error(2): No such file or directory

The detection of container memory limits will be ineffective until this is fixed.

This also causes a backend test failure:

/home/ubuntu/Impala/be/src/util/proc-info-test.cc:38
Value of: status_.ok()
  Actual: false
Expected: true
Error: Error reading /proc/self/cgroup: Error(25): Inappropriate ioctl for device

Issue Links

• causes: IMPALA-12244 CGroupInfo.ErrorHandling test failed in impala-asf-master-core-asan