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https://issues.apache.org/jira/browse/KUDU-2721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Wong reassigned KUDU-2721:
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Assignee: Tim Armstrong
> CHECK can be hit when there are gaps in present CPU numbers
> -----------------------------------------------------------
>
> Key: KUDU-2721
> URL: https://issues.apache.org/jira/browse/KUDU-2721
> Project: Kudu
> Issue Type: Bug
> Affects Versions: 1.8.0
> Environment: SLES12-SP3
> Reporter: Tim Armstrong
> Assignee: Tim Armstrong
> Priority: Critical
> Labels: crash
> Attachments: cpus.cc
>
>
> We saw a case where Impala is crashing in the Kudu client and it seems to be
> because the "present" string can have multiple ranges in it - "0-15,32-47\n"
> in this case. See
> https://github.com/apache/kudu/blob/148a0c7bec6554724339a2235cbd723fb74be339/src/kudu/gutil/sysinfo.cc#L177
> I've attached a small test program based on the code illustrating that the
> assert gets hit.
> I think we should figure out all of the possible formats for the present
> string and make sure we handle them. Or figure out a different way to get
> equivalent info.
> A workaround for the case that we saw was to disable hyperthreading, which
> changed the string to being a single range.
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