Hello, We have an issue in current 3.0 rc4 as seen by Rainer : - https://issues.apache.org/jira/browse/HTTPCLIENT-1742
The issue is due to a behavioral change in HttpClient 4.5.2 vs httpclient-4.2.6: - ResponseContentEncoding removes 3 headers from Response : Content-Encoding, Content-Length, Content-MD5 - JMeter uses DefaultRequestDirector which is replaced by MainClientExec Now here is what happens: At this line, PostProcessor run , leading to removal of 3 headers - https://github.com/apache/httpclient/blob/4.5.x/httpclient/src/main/java-deprecated/org/apache/http/impl/client/DefaultRequestDirector.java#L496 At the next line, keepAlive management is run, but it's too late as headers have been removed: - https://github.com/apache/httpclient/blob/4.5.x/httpclient/src/main/java-deprecated/org/apache/http/impl/client/DefaultRequestDirector.java#L500 While in new HC Class ProtocolExec: The keepAlive is managed in this https://github.com/apache/httpclient/blob/4.5.x/httpclient/src/main/java/org/apache/http/impl/execchain/ProtocolExec.java#L184 Which calls this: https://github.com/apache/httpclient/blob/4.5.x/httpclient/src/main/java/org/apache/http/impl/execchain/MainClientExec.java#L274 And Compression is managed afterwards in : https://github.com/apache/httpclient/blob/4.5.x/httpclient/src/main/java/org/apache/http/impl/execchain/ProtocolExec.java#L189 So no issue in HC4.5.2, but in JMeter. I think it's unfortunately a stopper for the release. Breaking KeepAlive is a big issue -- Regards. Philippe
