java – org. testng. Testngexception encountered while trying to access poolinghttpclientconnectionmanager

So I recently faced testngexception when trying to run an existing test suite using the IDE Recently I mean updating IntelliJ and dependencies to try to handle the latest version The failed code and stack trace are as follows –

Code use

ITests. java –

public class ITests extends BaseTest {
    private final Action action = new Action();
}

Basetest (just to share syntax) –

public class BaseTest {
    // where in this class does not use any instance of Http
}

Action. java –

public class Action {
    private final Http http = Http.getInstance();
}

Http. java –

public class Http {

    private static final Http INSTANCE = new Http(); //line 36

    public static Http getInstance() {
        return INSTANCE;
    }

    private Http() {
        PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(); //line 43
        connectionManager.setMaxTotal(100);
        connectionManager.setDefaultMaxPerRoute(100);
        RequestConfig defaultRequestConfig = RequestConfig.custom()
                .setSocketTimeout(60000)
                .setConnectTimeout(60000)
                .setConnectionRequestTimeout(60000)
                .build();
        this.client = HttpClients.custom().setDefaultRequestConfig(defaultRequestConfig)
                .setConnectionManager(connectionManager).build();
    }
}

Maven dependency –

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.2</version>
</dependency>

Stack trace –

Note - our project is based on maven, so when I use Maven exec to execute the test: Java executes normally

Please ask for any additional information you need

Edit 1 –

As @ Hunter requires, debug to get the exact path of cpool from the loaded location Assessment –

Class.forName("org.apache.http.impl.conn.CPool").getResource‌​("CPool.class")

Results –

Edit 2 –

MVN dependency: tree [most relevant to httpcomponents] –

- Maven dependency plugin: 2.8: tree

Solution

In the idea, Maven project tab, click the show dependencies button (which will display a chart), then press Ctrl f in the chart and type HttpCore and check the version If it displays a version lower than 4.4, you can analyze how dependencies are resolved Based on this, you can adjust POM to correct dependencies Because it uses MVN on the command line, it may be the wrong behavior of the idea to resolve Maven dependencies through its Maven plug-in