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 <[email protected]> wrote: > On Tue, Aug 17, 2010 at 7:39 PM, Vidhyashankar Venkataraman < > [email protected]> 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
