On 12/28/2015 5:12 AM, abhi Abhishek wrote: > i am trying to determine stable version of SOLR 4. is there a blog which > we can refer.. i understand we can read through Release Notes. I am > interested in user reviews and challenges seen with various versions of > SOLR 4.
Here's some information about Solr version numbers, with X.Y.Z providing the legend: X is the major version number. Major versions are released very infrequently. Y tracks the minor version number. Minor releases are made quite frequently. Z is incremented with bugfix releases. Most of the time, the third number in the version is zero. Every release of Solr that you can download from the official mirror network is built from a version control branch that is known as the stable branch. Currently that is branch_5x, at some point in the future it will be branch_6x. The goal of the stable branch is to always be in a state where a viable release candidate could be created. That's why it's called the stable branch. If all of the tests in the included test suite are passing, that's a good sign that there are no major problems. It's no guarantee, just a good sign. All releases have bugs, but unless those bugs are very nasty, they do not get fixed until the next minor version. When the bugs are particularly bad, there might be a bugfix release. It sounds like you're trying to decide which release you should use. The answer to that question is usually very easy -- the latest version, which is currently 5.4.0. Right after a new release happens, the best choice might be the newest bugfix release of the previous minor version. The pace of development is very high in Solr. Each new minor version includes new features and enhancements. The sum total of the differences between 4.0 and 4.10 is greater than the difference between 4.10 and 5.0. I would not recommend using a 4.x release at this time. The 4.x line went into maintenance mode ten months ago with the release of 5.0. The community is now focused on 5.x versions. If you mention a problem with a 4.x version now, the first thing you'll be told is that you need to upgrade, because unless the bug you're experiencing is a showstopper that affects a wide variety of users, it will not be fixed in 4.x. If it is a major bug that affects a large number of users, it will only be fixed a version like 4.10.5 -- a bugfix release on the last minor 4.x version. Thanks, Shawn
