This was the other way around, not a missing plugin, but a custom binary causing a conflict. The custom jar we use to create tokens for our requests seems to be creating a conflict somewhere. I could not even open an empty JMX with the jar in the lib folder.
It's even stopping me saving a new jmx, it would write the first HashTable block opening and not write anymore to file. I am in the process of rewriting it in pure groovy to loads in instead of the jar, but I still think it is a difficult position to be in as without it, JMeter is currently useless. -----Original Message----- From: Steve Kram <sk...@oasysic.com> Sent: 25 April 2022 13:14 To: JMeter Users List <user@jmeter.apache.org> Subject: RE: JMeter 5.4.3 unable to open jmx created in 5.2.1 Stuart, I encountered similar issues when I upgraded JMeter versions. The application started successfully, but just wouldn't open certain JMX scripts. Turns out the scripts were using a plug-in that wasn't yet installed, so the system provided similarly cryptic error messaging. Installing the missing component allowed the new version to successfully open the JMX. Steve Kram -----Original Message----- From: Stuart Kenworthy <stuart.kenwor...@bjss.com> Sent: Monday, April 25, 2022 8:06 AM To: JMeter Users List <user@jmeter.apache.org> Subject: RE: JMeter 5.4.3 unable to open jmx created in 5.2.1 Seem to have identified the issue, but not sure why it is so. When I say a clean installation, I did have to add a custom jar in there for authentication purposes. This jar seems to be quietly causing issues with the JMeter installation, I have no idea why, it is an internal binary for creating auth tokens. I also noticed my log files did not go through so the full call error is: java.lang.NoSuchMethodError: org.apache.jmeter.save.converters.HashTreeConverter.readBareItem(Lcom/thoughtworks/xstream/io/HierarchicalStreamReader;Lcom/thoughtworks/xstream/converters/UnmarshallingContext;Ljava/lang/Object;)Ljava/lang/Object; so may be a conflict in xstream libraries but once again no real information being provided by JMeter and there is no reference to these packages in the custom jar. From: Stuart Kenworthy <stuart.kenwor...@bjss.com> Sent: 25 April 2022 12:36 To: JMeter Users List <user@jmeter.apache.org> Subject: JMeter 5.4.3 unable to open jmx created in 5.2.1 I am currently going through an upgrade of our JMeter instances from 5.2.1 to 5.4.3. Most of our existing scripts were generated in JMeter 5.2.1, and all have been modified in such so they are all compliant with 5.2.1. When I try to open any of my scripts with either the default JMeter properties files, or our customised properties files we get an exception java.lang.NoSuchMethodError: org.apache.jmeter.save.converters.HashTreeConverter.readBareItem The full log sanitised log file has been included in the exception in a clean instance of jmeter 5.4.3. The script being loaded (portalLogOut.jmx) is one of our simplest. It was created in 5.2.1 and contains a single TestFragmentController, which contains a HttpTestSamplerGui, JSR223PostProcessor and Header Manager. As we are not undertaking a major release upgrade, I was expecting this to be a trivial move. I am struggling to find any other evidence of this occurring in the wild but also cannot find a recommended upgrade path from 5.2.1 to 5.4.3. I would like to avoid going through every version in between if I can. Any advice on how to resolve this issue? 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