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
