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From Albert Shau <albert.s...@yahoo.com.INVALID>
Subject Re: Rolling upgrade with coprocessors
Date Tue, 29 Nov 2016 21:27:46 GMT
Thanks very much for the help. I'm currently using a RegionObserver (to implement readless
increments) on a subset of my tables, and placing the jar on hdfs. I will try what Clay mentioned
and see if it works.

    On Wednesday, November 23, 2016 4:42 AM, Clay Baenziger (BLOOMBERG/ 731 LEX) <cbaenziger@bloomberg.net>

 Hi Albert,

The way I've seen it working -- if you need to leave the table online -- is specifying the
coprocessor in the hbase-site.xml of each region server and deploying the class to the table
without a path (just the classname). Then, ensure your hbase-site.xml has the correct version
for the region server running on that machine.

Esther and I briefly talked on this type of operation in http://www.slideshare.net/EstherKundin/coprocessors-uses-abuses-solutions-presented-at-hbasecon-east-2016
or https://www.youtube.com/watch?v=dYeJd9AAVlw

From: user@hbase.apache.org At: 11/18/16 19:33:54To: albert.shau@yahoo.com, user@hbase.apache.org
Subject: Re: Rolling upgrade with coprocessors

Can you tell us the version of hbase you are using and the new version
which you plan to upgrade to ?

A bit more detail on your coprocessor would also help narrow the scope of


On Fri, Nov 18, 2016 at 4:28 PM, Albert Shau <albert.shau@yahoo.com.invalid>

> Hi all,
> I'm using coprocessors with my tables and am wondering how I would perform
> an HBase rolling upgrade, since it seems like there are no compatibility
> guarantees for the coprocessor APIs. I'm guessing I would have to disable
> the table, alter the table to use a coprocessor compatible with the next
> HBase version, perform the rolling upgrade, then enable the table? Is there
> a way to keep the table enabled for this?
> Thanks,Albert

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