I understand that the problem will not be fixed. What I am trying to understand is even with the exception (the only exception I saw after running my Solr4 cluster on JDK11 for 4 weeks), I am able index and query documents just fine.
What does this exception really affect. On Wed, Aug 28, 2019 at 3:08 PM Shawn Heisey <apa...@elyograg.org> wrote: > On 8/27/2019 8:22 AM, Pushkar Raste wrote: > > I am trying to run Solr 4 on JDK11, although this version is not > supported > > on JDK11 it seems to be working fine except for the error/exception > "Unmap > > hack not supported on this platform". > > What the risks/downsides of running into this. > > The first version of Solr that was qualified with Java 9 was Solr 7.0.0. > New Java versions did not work properly with older versions of Solr. > Java 8 is as high as you can go with Solr 4. > > Solr versions up through 4.7.x have a minimum Java version requirement > of Java 6. From 4.8.0 through 5.x, Java 7 is required as a minimum. > Starting with Solr 6.0.0, the minimum requirement moved to Java 8. When > Solr 9.0.0 is released, its minimum requirement will be Java 11. > > Right now, with Solr 8.x being the current version, Solr 7.x is only > going to get major bugfixes, and there will be no updates at all to > version 6.x and older. The problem you're running into with Solr 4 on > Java 11 will not be fixed. If you want to run Java 11, you will need to > upgrade to the latest Solr 7.x or 8.x. Early 7.x versions would not > work with Java 10 or later. > > Thanks, > Shawn > -- — Pushkar Raste
