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From Todd Lipcon <t...@cloudera.com>
Subject Re: Hbase 0.89-hadoop version mismatch errors..
Date Sat, 21 Aug 2010 16:13:28 GMT
On Fri, Aug 20, 2010 at 8:48 PM, Alexey Kovyrin <alexey@kovyrin.net> wrote:

> Any ETA on b3?
>
>
Not sure I'm allowed to say the date, but in the next couple months :) Lots
of work still to be done to add and test security support across all the
different components.

-Todd


> On Fri, Aug 20, 2010 at 9:51 PM, Todd Lipcon <todd@cloudera.com> wrote:
> > Hey Vidhya,
> >
> > Also, YDH 0.20.100 doesn't include the Hadoop patch series from
> > branch-0.20-append that Cloudera and Facebook developed together to add
> > durability to HBase. Without these patches there are a lot of failure
> > scenarios that can cause a cluster to become inconsistent or lose some
> data.
> >
> > Our next beta of CDH will have all of the append-related patches for
> HBase
> > plus all of the YDH changes for security, MR improvements, etc, merged
> > together.
> >
> > Thanks
> > -Todd
> >
> > On Tue, Aug 17, 2010 at 10:36 PM, Gary Helmling <ghelmling@gmail.com>
> wrote:
> >
> >> On Tue, Aug 17, 2010 at 7:39 PM, Vidhyashankar Venkataraman <
> >> vidhyash@yahoo-inc.com> wrote:
> >>
> >> > When I try to start HBAse 0.89 along with Hadoop 0.20.100, Hbase fails
> to
> >> > start up with these errors in the namenode whioch leads to exceptions
> in
> >> > master and regionservers..
> >> >
> >> >
> >> When you say Hadoop 0.20.100, do you mean the yahoo-0.20.100 github
> branch,
> >> with backported security features?
> >>
> >> If so, HBase 0.89 will not currently run on it due to incompatible
> changes
> >> to security related classes (UserGroupInformation interface changes,
> >> removal
> >> of UnixUserGroupInformation class) that were also used in HBase.
> >>
> >> I have a work-in-progress branch on github that ports over some of the
> >> security changes here:
> >> http://github.com/ghelmling/hbase/tree/security
> >>
> >> What's there is experimental, and not fully tested, though.  And it
> still
> >> needs work before being proposed for actual inclusion.  But it should
> work
> >> for testing, depending on your needs.
> >>
> >> --gh
> >>
> >
> >
> >
> > --
> > Todd Lipcon
> > Software Engineer, Cloudera
> >
>
>
>
> --
> Alexey Kovyrin
> http://kovyrin.net/
>



-- 
Todd Lipcon
Software Engineer, Cloudera

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