pmm-agent zombie process

[cccfs]

Description

There are a large number of pmm agent zombie processes on the node after the container has been running for a period of time

root@xxxxx:/home/devops# ps -ef | grep defunct
1002       41943   41924  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002       75254   75216  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002      135336  135312  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002      189945  189907  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002      255571  255550  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002      490383  490362  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002      832919  831893  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002      958309  958247  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     1149464 1149438  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     1432295 1432274  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     1456164 1456146  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     1529058 1529006  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     1570434 1570407  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     1570576 1570555  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     1934653 1934622  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     2200061 2200036  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     2233784 2233763  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     2743856 2743742  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     2764617 2764587  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     2776280 2776248  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     2827057 2827011  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     2857980 2857944  0 Apr16 ?        00:00:00 [pmm-agent] <defunct>
1002     2997272 2997238  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     3035430 3035326  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     3051071 3050987  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     3627839 3627766  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     3875565 3875537  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     3887703 3887677  0  2025 ?        00:00:00 [pmm-agent] <defunct>
root     3959876 3943591  0 07:53 pts/0    00:00:00 grep --color=auto defunct
1002     3978334 3978116  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     3990004 3989974  0  2025 ?        00:00:00 [pmm-agent] <defunct>
1002     4184178 4184142  0  2025 ?        00:00:00 [pmm-agent] <defunct>

Expected Results

There shouldn't be zombie processes

Actual Results

1002 41943 41924 0 2025 ? 00:00:00 [pmm-agent]

Version

percona/pmm-client:3.x

Steps to reproduce

No response

Relevant logs

Code of Conduct

• I agree to follow Percona Community Code of Conduct

[cccfs]

Normal version: percona/pmm-client:3.4.1
Version with existing issues: percona/pmm-client:3.7.0、percona/pmm-client:3.3.0

[ademidoff]

@cccfs How can we reproduce this bug? What environment is pmm-agent running in?

I'd assume you are running a containerized version of pmm-agent while passing PMM_AGENT_SETUP=true and PMM_AGENT_SIDECAR=true to it, right?

Is it launched by Podman, Docker, anything else?

Anyway, need a bit more info to start ivestigating.

[ademidoff]

Also, could you please provide the output of ps -ef --forest to see who the live PPIDs are?

[cccfs]

@cccfs How can we reproduce this bug? What environment is pmm-agent running in?如何重现此错误？ pmm-agent 运行在什么环境下？

I'd assume you are running a containerized version of pmm-agent while passing PMM_AGENT_SETUP=true and PMM_AGENT_SIDECAR=true to it, right?我假设你运行的是容器化的 pmm-agent 版本，并且向其传递了 PMM_AGENT_SETUP=true 和 PMM_AGENT_SIDECAR=true ，对吗？

Is it launched by Podman, Docker, anything else?它是由 Podman、Docker 还是其他什么工具启动的？

Anyway, need a bit more info to start ivestigating.总之，还需要更多信息才能开始调查。

I am through the operator https://github.com/percona/percona-server-mongodb-operator The https://github.com/percona/percona-postgresql-operator Launched pmm agent