We found HDFS-9426. The rolling upgrade finalization is not backward compatible.I.e. 2.7.1 or 2.6.x datanodes will ignore finalization.
So -1. Kihwal From: Vinod Kumar Vavilapalli <vino...@apache.org> To: common-...@hadoop.apache.org; hdfs-dev@hadoop.apache.org; yarn-...@hadoop.apache.org; mapreduce-...@hadoop.apache.org Cc: vino...@apache.org Sent: Wednesday, November 11, 2015 10:31 PM Subject: [VOTE] Release Apache Hadoop 2.7.2 RC0 Hi all, I've created a release candidate RC0 for Apache Hadoop 2.7.2. As discussed before, this is the next maintenance release to follow up 2.7.1. The RC is available for validation at: *http://people.apache.org/~vinodkv/hadoop-2.7.2-RC0/ <http://people.apache.org/~vinodkv/hadoop-2.7.2-RC0/>* The RC tag in git is: release-2.7.2-RC0 The maven artifacts are available via repository.apache.org at *https://repository.apache.org/content/repositories/orgapachehadoop-1023/ <https://repository.apache.org/content/repositories/orgapachehadoop-1023/>* As you may have noted, an unusually long 2.6.3 release caused 2.7.2 to slip by quite a bit. This release's related discussion threads are linked below: [1] and [2]. Please try the release and vote; the vote will run for the usual 5 days. Thanks, Vinod [1]: 2.7.2 release plan: http://markmail.org/message/oozq3gvd4nhzsaes [2]: Planning Apache Hadoop 2.7.2 http://markmail.org/message/iktqss2qdeykgpqk