HTTP2 Request cannot be send via JMeter - jmeter

Question

I'm trying to send HTTP2 requests via JMeter.
I've downloaded alpn-boot file according to my java version: java version "1.8.0_151" -> ALPN version is 8.1.11.v20170118 (according to https://www.eclipse.org/jetty/documentation/9.4.x/alpn-chapter.html#alpn-versions). Also, I've added the path to alpn-boot file to jmeter.bat:
set JVM_ARGS= -Xbootclasspath/p:D:\apache-jmeter-5.1\apache-jmeter-5.1\lib\alpn-boot-8.1.11.v20170118.jar
#echo off
rem Licensed to the Apache Software Foundation (ASF) under one or more
rem contributor license agreements. See the NOTICE file distributed with
...
But I get an error message in JMeter:
java.util.concurrent.ExecutionException: java.lang.IllegalStateException: No Client ALPNProcessors!
at org.eclipse.jetty.util.FuturePromise.get(FuturePromise.java:138)
at com.blazemeter.jmeter.http2.sampler.HTTP2Connection.connect(HTTP2Connection.java:69)
at com.blazemeter.jmeter.http2.sampler.HTTP2Request.setConnection(HTTP2Request.java:280)
at com.blazemeter.jmeter.http2.sampler.HTTP2Request.sample(HTTP2Request.java:140)
at com.blazemeter.jmeter.http2.sampler.HTTP2Request.sample(HTTP2Request.java:117)
at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:475)
at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:418)
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:249)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalStateException: No Client ALPNProcessors!
at org.eclipse.jetty.alpn.client.ALPNClientConnectionFactory.<init>(ALPNClientConnectionFactory.java:57)
at org.eclipse.jetty.http2.client.HTTP2Client.lambda$doStart$1(HTTP2Client.java:155)
at org.eclipse.jetty.http2.client.HTTP2Client$ClientSelectorManager.newConnection(HTTP2Client.java:438)
at org.eclipse.jetty.io.ManagedSelector.createEndPoint(ManagedSelector.java:222)
at org.eclipse.jetty.io.ManagedSelector.access$1500(ManagedSelector.java:60)
at org.eclipse.jetty.io.ManagedSelector$CreateEndPoint.run(ManagedSelector.java:825)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:754)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:672)
... 1 more
Suppressed: java.lang.NoClassDefFoundError: org/eclipse/jetty/alpn/ALPN
at org.eclipse.jetty.alpn.java.client.OpenJDK8ClientALPNProcessor.init(OpenJDK8ClientALPNProcessor.java:42)
at org.eclipse.jetty.alpn.client.ALPNClientConnectionFactory.<init>(ALPNClientConnectionFactory.java:77)
... 8 more
Caused by: java.lang.ClassNotFoundException: org.eclipse.jetty.alpn.ALPN
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 10 more
I guess the issue is connected with alpn path in jmeter.bat file, but how to correct it?

Answer 1

First of all ensure that JMeter is using your Java 1.8.0_151 and taking the -Xbootclasspath argument, you can do this by adding a JSR223 Sampler and using the following Groovy code:
log.info('Java version: ' + System.getProperty('java.version'))
java.lang.management.ManagementFactory.getRuntimeMXBean().getInputArguments().each {
log.info("Effective JVM argument: " + "$it")
}
you should get the output like:
Check that the alpn-boot file is really there:
Sanitize the input, i.e. remove whitespace, add a semicolon at the end and surround the value with quotation marks:
set JVM_ARGS="-Xbootclasspath/p:D:\apache-jmeter-5.1\apache-jmeter-5.1\lib\alpn-boot-8.1.11.v20170118.jar;"
If everything goes well you should be able to successfully execute the HTTP2 request:
More information: The New HTTP/2 Plugin for JMeter