What Hadoop 3 version do you use? On Mon, Oct 5, 2020 at 10:03 AM Wei-Chiu Chuang <weic...@apache.org> wrote:
> I have anecdotally learned of multiple data points where during the > upgrading from Hadoop 2 to Hadoop 3, DN heap usage increases to the point > where it goes OOM. > > Don't have much logs for this issue, but I suspect it's caused by the > layout change added in Hadoop 2.8.0. > > Does anyone else observe the same issue and how do you mitigate this? For > now we suggested increasing DN heap size prior to upgrade as part of > pre-upgrade checklist. > > Thanks, > Wei-Chiu >
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