[NIFI-11700] Java 17 Nashorn standalone support

• Type: Wish
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Ryan Miller
• Created: 16/Jun/23 07:04
• Updated: 16/Jun/23 14:59

Description

Motivation

Nashorn was removed with the release of JDK 15 and is unavailable in Java 17. Standalone Nashorn or a scripting engine alternative is required for scripting processors to run ECMAScript.

Related Tickets

Requires:

• Support building with version 61 class files [1]

Past Related Tickets:

• Support building with Java 17 [2]

Versions

• openjdk 17.0.7 2023-04-18

• NiFi 2.0.0-SNAPSHOT (fork) [3]

• Maven 3.9.2 (mvn) [4]

Setup

• Clone NiFi repo v2.0.0
• Add Nashorn standalone (see fork) [3]

 

<dependency>
            <groupId>org.openjdk.nashorn</groupId>
            <artifactId>nashorn-core</artifactId>
            <version>15.4</version>
            <scope>provided</scope>
</dependency>

• Add Nashorn to the script engine (see fork) [3]

• Build NiFi
• Run NiFi

 

NiFi crashed after startup, nifi-app.log contains the relevant errors.

Adding standalone Nashorn to NiFi caused the following errors to occur:

 

Caused by: java.lang.IllegalArgumentException: Unsupported class file major version 61
    at org.objectweb.asm.ClassReader.<init>(ClassReader.java:196)
    at org.objectweb.asm.ClassReader.<init>(ClassReader.java:177)
    at org.objectweb.asm.ClassReader.<init>(ClassReader.java:163)
    at org.objectweb.asm.ClassReader.<init>(ClassReader.java:284)
    at org.eclipse.jetty.annotations.AnnotationParser.scanClass(AnnotationParser.java:932)
    at org.eclipse.jetty.annotations.AnnotationParser.parseJarEntry(AnnotationParser.java:917)
    at org.eclipse.jetty.annotations.AnnotationParser.lambda$parseJar$2(AnnotationParser.java:876)
    ... 9 common frames omitted
 
Caused by: java.lang.RuntimeException: Error scanning entry com/fasterxml/jackson/core/io/doubleparser/FastDoubleSwar.class from jar file:///<path>/<to>/<nifi>/nifi-assembly/target/nifi-2.0.0-SNAPSHOT-bin/nifi-2.0.0-SNAPSHOT/work/jetty/nifi-standard-content-viewer-2.0.0-SNAPSHOT.war/webapp/WEB-INF/lib/jackson-core-2.15.2.jar
    at org.eclipse.jetty.annotations.AnnotationParser.lambda$parseJar$2(AnnotationParser.java:880)
    at java.base/java.util.TreeMap$ValueSpliterator.forEachRemaining(TreeMap.java:3215)
    at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762)
    at org.eclipse.jetty.annotations.AnnotationParser.parseJar(AnnotgradleationParser.java:872)
    at org.eclipse.jetty.annotations.AnnotationParser.parse(AnnotationParser.java:835)
    at org.eclipse.jetty.annotations.AnnotationConfiguration$ParserTask.call(AnnotationConfiguration.java:159)
    at org.eclipse.jetty.annotations.AnnotationConfiguration$1.run(AnnotationConfiguration.java:455)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:883)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1034)
    at java.base/java.lang.Thread.run(Thread.java:833)
 

 

These errors were caused by NiFi not supporting the building of version 61 class files (class files in packages built with Java 17).

 

[1] https://issues.apache.org/jira/browse/NIFI-11701

[2] https://issues.apache.org/jira/browse/NIFI-9281

[3] https://github.com/Aerilym/nifi/tree/nashorn

[4] https://maven.apache.org/install.html

Issue Links

• relates to: NIFI-11713 Remove Deprecated ECMAScript Support