Plugin Manager Error

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Prasanna Balakrishnan

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Dec 16, 2025, 1:37:50 AM12/16/25
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Hi All,

We are from Verizon. We are in the process of packaging Apache JMeter Plugin Manager so that it can be distributed to our employees via a MDM solutiom. 

In the process of Packaging it, we placed the Plugin Manager JAR file in \lib\ext directory but in JMeter, when we click on Plugin Manager, we get errors such as

Java.net.SocketException: Connection Reset
Java.net.ConnectException: Connection Refused ; no further information.

Our organisation is behind a proxy and I tried to update the system.properties file, but it still fails.
I then tried to export the CERT and import to to the Java cacerrs using :
keytool -importcert -trustcacerts -file "C:\Tools\jmeter-plugins.org.crt" -alias proxy_ca_cert -keystore "C:\Program Files\Java\jre8\lib\security\cacerts" -storepass changeit

Still the same issue.

Please advice on further steps.

Vincent Daburon

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Dec 18, 2025, 9:15:05 AM12/18/25
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Hi,
I think you need add the certificat of your enterprise proxy ( CERT1) not the jmeter-plugins.org certificat in the JDK cacerts.
The enterprise proxy is like  Man In The Middle 
Your JMeter == https ==> Enterprise Certificat From The proxy CERT1 == https ==> jmeter-plugins.org Certificat CERT2.

Regards.
Vincent DAB.
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