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.