JMeter HTTP2 request error (Java 8, JMeter 5.1) - jmeter

Question

I have java 1.8.0_151 installed and JMeter 5.1. Trying to send HTTP2 request getting the following error:
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.doSampling(JMeterThread.java:622)
at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:546)
at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:486)
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:253)
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.IllegalStateException: org.eclipse.jetty.alpn.ALPN must be on JVM boot classpath
at org.eclipse.jetty.alpn.java.client.OpenJDK8ClientALPNProcessor.init(OpenJDK8ClientALPNProcessor.java:43)
at org.eclipse.jetty.alpn.client.ALPNClientConnectionFactory.<init>(ALPNClientConnectionFactory.java:77)
... 8 more
I have downloaded alpn-boot-8.1.11.v20170118.jar (according to my java version) to jmeter\lib folder and added the following record 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;". HTTP2 request still cannot be sent properly. What I missed? Thank you in advance 😊

Answer 1

Your steps look good, I can only think of 2 reasons for the HTTP2 Sampler not working:
Wrong path to the alpn-boot library, you can check it using dir command like:
dir d:\apache-jmeter-5.1\apache-jmeter-5.1\lib\alpn-boot-8.1.11.v20170118.jar
you should see something like:
Check the Java version JMeter is using as it might pick up not the 1.8.0_151, but the one which comes first in PATH. In order to ensure that JMeter is using the correct Java runtime you can explicitly declare it in jmeter.bat file:
set PATH=d:\java\bin;%PATH%
And finally you can use JSR223 Sampler to print Java version and effective Java arguments, the relevant code would be something like:
log.info('Java version: ' + System.getProperty('java.version'))
java.lang.management.ManagementFactory.getRuntimeMXBean().getInputArguments().each {
log.info("Effective JVM argument: " + "$it")
}
If the above checklist items are applied you should be able to normally execute HTTP2 requests:
Also be aware that according to 9 Easy Solutions for a JMeter Load Test “Out of Memory” Failure you should always be using the latest version of JMeter so consider upgrading to JMeter 5.2 (or whatever is the latest stable version available at JMeter Downloads page) as soon as possible.

Answer 2

Check this thread also:
HTTP2 request sample crashes with Jmeter4, Java 10 No Client ALPNProcessors .
It says here: In particular, the jetty-alpn-openjdk8-client dependency is invalid and not appropriate for Java 9+. For Java 9+, the jetty-alpn-java-client should be used instead.