[ 
https://issues.apache.org/jira/browse/HTTPCLIENT-1203?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Oleg Kalnichevski resolved HTTPCLIENT-1203.
-------------------------------------------

    Resolution: Invalid

It is a class loader (project setup) problem, not a bug in HttpClient 4.2. 
Apparently there is an older version of HttpClient on the classpath whose 
classes get picked by the class loader over newer classes.

Oleg
                
> java.lang.NoSuchMethodError: 
> org.apache.http.impl.conn.DefaultClientConnectionOperator
> --------------------------------------------------------------------------------------
>
>                 Key: HTTPCLIENT-1203
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1203
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: HttpClient
>    Affects Versions: 4.2 Final
>         Environment: windows xp        jdk6
>            Reporter: yule
>              Labels: patch
>   Original Estimate: 168h
>  Remaining Estimate: 168h
>
> SchemeRegistry schemeRegistry = new SchemeRegistry();
>             schemeRegistry.register(new Scheme("http", 80, 
> PlainSocketFactory.getSocketFactory()));
>             HttpParams params = null;
>             PoolingClientConnectionManager pm = new 
> PoolingClientConnectionManager(schemeRegistry);
> java.lang.NoSuchMethodError: 
> org.apache.http.impl.conn.DefaultClientConnectionOperator.<init>(Lorg/apache/http/conn/scheme/SchemeRegistry;Lorg/apache/http/conn/DnsResolver;)V
>       at 
> org.apache.http.impl.conn.PoolingClientConnectionManager.createConnectionOperator(PoolingClientConnectionManager.java:140)
>       at 
> org.apache.http.impl.conn.PoolingClientConnectionManager.<init>(PoolingClientConnectionManager.java:114)
>       at 
> org.apache.http.impl.conn.PoolingClientConnectionManager.<init>(PoolingClientConnectionManager.java:99)
>       at 
> org.apache.http.impl.conn.PoolingClientConnectionManager.<init>(PoolingClientConnectionManager.java:85)
>       at 
> org.apache.http.impl.conn.PoolingClientConnectionManager.<init>(PoolingClientConnectionManager.java:93)
>       at 
> com.mbaobao.api.stock.util.NewHttpClientUtil.<clinit>(NewHttpClientUtil.java:46)

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