Apache Hadoop 2.6.1 Release Notes

These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.

Public service notice: * Every restart of a 2.6.x or 2.7.0 DN incurs a risk of unwanted block deletion. * Apply this patch if you are running a pre-2.7.1 release.

Proxy level retries will not be done on AlreadyBeingCreatedExeption for create() op.

Existing sequence files can be appended.