Hi Dirk, Thanks for summarizing your findings in the referenced Jira issues. It sounds like subsequent discussion of Nashorn support may be better on a new thread.
The Spring 6 and Jetty 11 upgrades are going to require significant work. One incremental step in that direction was making Java 17 the minimum version, and upgrading to Jetty 10 should also help move things forward. Although compiling NiFi modules with a reference to the standalone Nashorn library may introduce issues, there should be other options for referencing the library at runtime. That requires custom class loading, which some Processors support, so that seems like the general direction to go. If you have additional findings, feel free to start a new developer list thread and that may gather additional feedback. Regards, David Handermann On Wed, Jun 21, 2023 at 12:17 AM Dirk Arends <dirk.are...@fontis.com.au> wrote: > Since initially raising concerns about the move to Java 17 losing Nashorn, > I have been investigating the suggestion to use Nashorn as a standalone > package as potential easier alternative to GraalVM. [1] > > While making some progress, a number of issues have been encountered which > I haven't been able to resolve as yet. More details are included in > relevant JIRA tickets, but summarising: > > - Building NiFi with a recent Nashorn dependency leads to errors > "Unsupported class file major version 61" [2] > - Building NiFi using Java 17 highlights issues with the current Jetty > version, which I believe would require an upgrade from 9.4.51 to 11.0.15 > [3] > - Jetty 11 then requires an upgrade of the Spring Framework version 5 to 6. > [4] > > The current steps to remove references to "Javascript" as a preinstalled > scripting language [5] are understandable, but it does seem there is still > quite a bit to do before Nashorn or another external scripting engine could > be used. > > [1] https://issues.apache.org/jira/browse/NIFI-11700: Java 17 Nashorn > standalone support > [2] https://issues.apache.org/jira/browse/NIFI-11701: Support building > with > version 61 class files > [3] https://issues.apache.org/jira/browse/NIFI-11702: Upgrade Jetty to > version 11 > [4] https://issues.apache.org/jira/browse/NIFI-11703: Upgrade Spring > Framework to version 6 > [5] https://issues.apache.org/jira/browse/NIFI-11713: Remove Deprecated > ECMAScript Support > > Regards, > Dirk Arends >
