On Thu, 26 May 2022 06:28:22 GMT, Peter Levart <plev...@openjdk.org> wrote:
>> @plevart Are you asking about the reason for the crash or about the changes?
>> If it's the former, then I believe that the crash comes not from
>> `getInstance()` returning `null`, but from further down the stack because
>> `null` is being passed to `getInstance()`. I could be wrong in interpreting
>> the report, though.
>>
>> If the question's about the changes, then those are restricted to CgroupV2,
>> so I'm not sure how `CgroupV1Subsystem.getInstance(...)` returning null is
>> related. FWIW, I also don't think we are going to get here if there are no
>> active controllers. There's this code a few lines above:
>>
>> if (!result.isAnyControllersEnabled()) {
>> return null;
>> }
>
> I was just contemplating the code around the change as it appears to have
> unnecessary checks which result in dead code. From the point of fixing just
> this concrete NPE, they are irrelevant. So while this code might benefit from
> cleanup, perhaps this PR is not the place to do it. Perhaps it is a matter of
> another issue and PR.
@plevart I think I now understand what you meant and removed the unnecessary
checks. Please, have a look.
-------------
PR: https://git.openjdk.java.net/jdk/pull/8803
