sharePidns would cause zombie process leak in the container

[lifupan]

Description of problem

Since the sharedpidns init process hasn't the child reap function, thus there is no init process would reap
the zombie process in the container. for much info please see kata-containers/runtime#2794 (comment).

Expected result

(replace this text with an explanation of what you thought would happen)

Actual result

(replace this text with the output of the kata-collect-data.sh script, after
you have reviewed its content to ensure it does not contain any private
information).

[ariel-adam]

@lifupan Could clarify this bug?
What exactly is the problem including the expected result and actual result

[jodh-intel]

Hi @lifupan - please could you clarify - is this still an issue? If not, please could you provide the issue/PR number?

[lifupan]

Hi @lifupan - please could you clarify - is this still an issue? If not, please could you provide the issue/PR number?

Hi @jodh-intel

Actually this issue is specific to share sandboxpidns when createsandbox requested as https://github.com/kata-containers/agent/blob/master/grpc.go#L1490. But by now it seemed we hadn't used this feature, and we only do share the sandbox pid ns with the pause container's init process instead of create an separated pause process, thus I think I can close this issue temporarily.