Hello HDFS devs, Work has largely stabilized on the HA-branch in the last few weeks. At this point the HA NN project is nearly feature-complete for manual failover. We've been running the full test suite nightly, and all automated tests have been passing, except for one known test failure which should be fixed shortly.
I'd like to begin the process of merging this branch back to HDFS trunk. There are still several outstanding sub-JIRAs under the HDFS-1623 and HADOOP-7454 umbrella JIRAs, but most of these are either nice-to-haves or relate to supporting automatic failover. Once the branch is merged to trunk, work on these JIRAs can continue there. I've identified the following JIRAs which I think should be the only remaining blockers for merging to trunk: HDFS-2904 - Client support for getting delegation tokens in an HA cluster HDFS-2920 - Fix remaining TODOs in the code from HA. Mostly little cleanup stuff. HDFS-2958 - Sweep for remaining proxy construction which doesn't go through failover path HDFS-2979 - Balancer should use logical URI for creating failover proxy (will fix the only current test failure) All of these JIRAs should be fixed in the next few days. I propose that, unless more blocker issues are discovered in the interim, we merge this branch to trunk one week from today, i.e. Wednesday, February 29th. During this time we will also execute the test plans described in the test documents attached to HDFS-1623 to try to identify any regressions or performance issues in the branch. If you plan to review the code changes or the test plan, I ask that you please do so as soon as possible. Feedback is certainly welcome on this plan. Thanks a lot, Aaron -- Aaron T. Myers Software Engineer, Cloudera
