I would be fine with the change for 1.6.0 if the current example configurations are not removed. On Apr 5, 2014 8:32 AM, "Christopher" <[email protected]> wrote:
> Below is a defense of my applying ACCUMULO-1395 to the 1.6.0-SNAPSHOT > branch. Since it was reverted, my hope here is to successfully argue > the case that it should be included: > > The bin/bootstrap_config.sh script does not result in files that are > appropriate for use on Hadoop 1. It requires manual modification to > work. There are other reasons a user might need to modify these files > before running, such as changing the default instance secret. However, > bin/accumulo init warns users to edit that. It does not warn if you're > using Hadoop 1. This is essentially a bug, because it's not obvious to > users that the configuration generated will fail to work, and the > error messages in 'bin/accumulo init' are not very informative as to > how to fix the problem. > > This makes it quite annoying for testing on Hadoop 1, as every new > build requires manually editing config files to work. ACCUMULO-1395 > solves this by adding an extra prompt to bootstrap_config.sh and > generating config files which work right away. > > However, that fix has been determined to be inappropriate for 1.6.0. > Perhaps a smaller, more targeted fix, to add a prompt to the > bootstrap_config.sh file, to alter the config files appropriately for > Hadoop 1 should be done for 1.6.0? However, this fix is available now, > and the only thing it might need, is a slight edit of the README to > note that the bootstrap_config.sh prompts for Hadoop 1 or Hadoop 2, to > generate examples. > > While this change looks like a large change, it really isn't. Most of > the changes are removing redundant configuration examples in favor of > a single example, used as a template. Removing multiple copies of > almost identical files in favor of a single set makes the patch look > artificially large. It's actually a quite minor change. While the > intention of ACCUMULO-1395 was ease of maintenance, it turns out it > actually eases testing and user experience, by fixing the bugs in the > previously produced config files from bootstrap_config.sh for Hadoop > 1, which required manual intervention. The benefits for maintenance > from the consolidation of the examples is secondary to this fix, at > this point. > > The common objections, and justification for reverting, make sense, > but I think they are unwarranted in this case, because, while the > ticket is labeled "Improvement", it actually fixes a bug. It also > doesn't actually make improvements or add features to Accumulo > itself... just examples and packaging improvements, which we've > previously identified as acceptable to change in preparation for > release, after the feature freeze. Further, it has been up on > ReviewBoard for weeks, and John has responded to all the feedback. It > has been thoroughly tested, works great, and has been ready for weeks. > I know there may still be improvements or changes that could be done, > but this fixes problems now, and eases testing on Hadoop 1. > > If the objections stand, in favor of reverting and delaying to 1.7.0, > perhaps a more targeted fix to bootstrap_config.sh would be > acceptable, adding a prompt for Hadoop 1/Hadoop 2, which does not > consolidate the examples? This could be done with additional example > copies (easy), or some automated in-place editing after copying (not > too much harder). > > -- > Christopher L Tubbs II > http://gravatar.com/ctubbsii >
