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From Oleg Kalnichevski <ol...@apache.org>
Subject Re: HTTPClient 4 : Request hangs for 4-5 seconds when using IP's is used without reverse DNS only on Windows
Date Tue, 05 Feb 2013 09:50:32 GMT
On Mon, 2013-02-04 at 22:25 +0100, Philippe Mouawad wrote:
> Hello,
> 
> We had an issue reported in JMerer related to HttpClient version 4.X.X
> which does not happen in version 3.1.
> 
> Thread dump shows thread hangs within InetAddress$1.getHostByAddr:
> 
> "Thread Group 1-1" prio=6 tid=0x038f3c00 nid=0xd80 runnable [0x03b7f000]
>    java.lang.Thread.State: RUNNABLE
>         at java.net.Inet4AddressImpl.getHostByAddr(Native Method)
>         at java.net.InetAddress$1.getHostByAddr(Unknown Source)
>         at java.net.InetAddress.getHostFromNameService(Unknown Source)
>         at java.net.InetAddress.getHostName(Unknown Source)
>         at java.net.InetAddress.getHostName(Unknown Source)
>         at sun.security.ssl.SSLSocketImpl.getHost(Unknown Source)
>         - locked <0x1349be48> (a sun.security.ssl.SSLSocketImpl)
>         at sun.security.ssl.Handshaker.getHostSE(Unknown Source)
>         at sun.security.ssl.ClientHandshaker.getKickstartMessage(Unknown Source)
>         at sun.security.ssl.Handshaker.kickstart(Unknown Source)
>         at sun.security.ssl.SSLSocketImpl.kickstartHandshake(Unknown Source)
>         - locked <0x1349be48> (a sun.security.ssl.SSLSocketImpl)
>         at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown
> Source)
>         - locked <0x1349c038> (a java.lang.Object)
>         at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
>         at sun.security.ssl.SSLSocketImpl.getSession(Unknown Source)
>         at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:91)
>         at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:572)
>         at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180)
>         at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:294)
>         at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:640)
>         at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)
>         at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
>         at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
>         at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:284)
>         at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:62)
>         at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1075)
>         at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1064)
>         at org.apache.jmeter.threads.JMeterThread.process_sampler(JMeterThread.java:426)
>         at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:255)
>         at java.lang.Thread.run(Unknown Source)
> 
> 
> 
> Do you remember fixing this kind of issue within version 3.X ?, something
> like this:
> - http://www.velocityreviews.com/forums/showpost.php?p=2959030&postcount=8
> 

Caching of resolved addresses also has downsides. For instance, it
breaks simple load distribution schemes based on DNS round-robin.   

I am pretty certain HC 3.x does not use InetAddress caching. However, HC
4.x socket initialization logic is significantly different from that of
3.x. 

Oleg



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