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<p><strong>About</strong></p>
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<strong>Changes</strong></font>
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This page details the changes made in the current version only.
Earlier changes are detailed in the 
<a href="changes_history.html">
History of Previous Changes
Version 2.4
Summary of main changes
JMeter now requires at least Java 1.5.
HTTP Proxy can now record HTTPS sessions.
JUnit sampler now supports JUnit4 annotations.
Added JSR223 (javax.script) test elements.
MailReader Sampler can now use any protocol supported by the underlying implementation.
An SMTP Sampler has been added.
JMeter now allows users to provide their own Thread Group implementations.
View Results Tree now supports more display options, including search and Regex Testing.
StatCalculator performance is much improved; Aggregate Report etc. need far less memory.
JMS samplers have been extensively reworked, and should no longer lose messages.
Correlation processing is improved.
JMS Publisher and Subscriber now support both Topics and Queues.
Many other improvements have been made, please see below and in the manual.
The Include Controller has some problems in non-GUI mode. 
In particular, it can cause a NullPointerException if there are two include controllers with the same name.
Once Only controller behaves correctly under a Thread Group or Loop Controller,
but otherwise its behaviour is not consistent (or clearly specified).
The menu item Options / Choose Language does not change all the displayed text to the new language.
[The behaviour has improved, but language change is still not fully working]
To override the default local language fully, set the JMeter property "language" before starting JMeter. 
Incompatible changes
HTTP Redirect now defaults to "Follow Redirects" rather than "Redirect Automatically".
This is to enable JMeter to track cookies that may be sent during redirects.
This does not affect existing test plans; it only affects the default for new HTTP Samplers.
The Avalon file format for JMX and JTL files is no longer supported.
Any such files will need to be converted by reading them in JMeter 2.3.4 and resaving them.
The XPath Assertion and XPath Extractor elements no longer fetch external DTDs by default; this can be changed in the GUI.
JMSConfigGui has been renamed as JMSSamplerGui.
This does not affect existing test plans.
The constructor public SampleResult(SampleResult res) has been changed to become a true "copy constructor".
It no longer calls addSubResult(). This may possibly affect some 3rd party add-ons.
HTTP Samplers and Proxy
Bug 47445 - Using Proxy with https-spoofing secure cookies need to be unsecured
Bug 47442 - Missing replacement of https by http for certain conditions using https-spoofing
Bug 48451 - Error in: SoapSampler.setPostHeaders(PostMethod post) in the else branch
Bug 48542 - SoapSampler uses wrong response header field to decide if response is gzip encoded
Bug 48568 - CookieManager broken for AjpSampler
Bug 48570 - AjpSampler doesn't support query parameters (GET/POST)
Bug 46901 - HTTP Sampler does not process var/func refs correctly in first file parameter
Bug 43678 - Handle META tag http-equiv charset?
Bug 49294 - Images not downloaded from redirected-to pages
Bug 49560 - wrong "size in bytes" when following redirections
Other Samplers
Bug 47420 - LDAP extended request not closing connections during add request
Bug 48573 - LDAPExtSampler directory context handling
Bug 47870 - JMSSubscriber fails due to NPE
Bug 47899 - NullPointerExceptions in JMS ReceiveSubscriber constructor
Bug 48144 - NPE in JMS OnMessageSubscriber
Bug 47992 - JMS Point-to-Point Request - Response option doesn't work
Bug 48579 - Single Bind does not show config information when LdapExt Sampler is accessed
Bug 49111 - "Message With ID Not Found" Error on JMS P2P sampler.
Bug 47949 - JMS Subscriber never receives all the messages
Bug 46142 - JMS Point-to-Point correlation problems
Bug 48747 - TCP Sampler swallows exceptions
Bug 48709 - TCP Sampler Config setting "classname" has no effect
Controllers
Bug 47385 - TransactionController should set AllThreads and GroupThreads
Bug 47940 - Module controller incorrectly creates the replacement Sub Tree
Bug 47592 - Run Thread groups consecutively with "Stop test" on error, JMeter will not mark to finished
Bug 48786 - Run Thread groups consecutively: with "Stop test now" on error or manual stop, JMeter leaves the green box active
Bug 48727 - Cannot stop test if all thread groups are disabled
Bug 48603 - Mailer Visualiser sends two emails for a single failed response
Correct calculation of min/max/std.dev for aggregated samples (Summary Report)
Bug 48889 - Wrong response time with mode=Statistical and num_sample_threshold > 1
Bug 47398 - SampleEvents are sent twice over RMI in distributed testing and non gui mode
Bug 47646 -  NullPointerException in the "Random Variable" element
Disallow adding any child elements to JDBC Configuration
BeanInfoSupport now caches getBeanDescriptor() - should avoid an NPE on non-Sun JVMs when using CSVDataSet (and some other TestBeans)
Bug 48350 - Deadlock on distributed testing with 2 clients
Bug 48901 - Endless wait by adding Synchronizing Timer
Bug 49149 - usermanual/index.html has typo in link to "Regular Expressions" page
Bug 49394 - Classcast Exception in ActionRouter.postActionPerformed
Bug 48136 - Essential files missing from source tarball.
Source archives now contain all source files, including source files previously only provided in the binary archives.
Bug 48331 - XpathExtractor does not return XML string representations for a Nodeset
Improvements
HTTP Samplers
Bug 47622 - enable recording of HTTPS sessions
Allow Proxy Server to be specified on HTTP Sampler GUI and HTTP Config GUI
Bug 47461 - Update Cache Manager to handle Expires HTTP header
Bug 48153 - Support for Cache-Control and Expires headers
Bug 47946 - Proxy should enable Grouping inside a Transaction Controller
Bug 48300 - Allow override of IP source address for HTTP HttpClient requests
Bug 49083 - collapse '/pathsegment/..' in redirect URLs
Other samplers
JUnit sampler now supports JUnit4 tests (using annotations)
Bug 47900 - Allow JMS SubscriberSampler to be interrupted
Added JSR223 Sampler
Bug 47556 - JMS-PointToPoint-Sampler Timeout field should use Strings
Bug 47947 - Mail Reader Sampler should allow port to be overridden
Bug 48155 - Multiple problems / enhancements with JMS protocol classes
Allow MailReader sampler to use arbitrary protocols
Bug 45053 - SMTP-Sampler for JMeter
Bug 49552 - Add Message Headers on SMTPSampler
JMS Publisher and Subscriber now support both Topics and Queues.
Added read Timeout to JMS Subscriber.
General clean-up of JMS code.
Controllers
Bug 47909 - TransactionController should sum the latency
Bug 41418 - Exclude timer duration from Transaction Controller runtime in report
Bug 48749 - Allowing custom Thread Groups
Bug 43389 - Allow Include files to be found relative to the current JMX file
Added DataStrippingSample sender - supports "Stripped" and "StrippedBatch" modes.
Added Comparison Assertion Visualizer
Bug 47907 - Improvements (enhancements and I18N) Comparison Assertion and Comparison Visualizer
Bug 36726 - add search function to Tree View Listener
Bug 47869 - Ability to cleanup fields of SampleResult
Bug 47952 - Added JSR223 Listener
Bug 47474 - View Results Tree support for plugin renderers
Allow Idle Time to be saved to sample log files
Bug 48259 - Improve StatCalculator performance by using TreeMap
Listeners using SamplingStatCalculator have much reduced memory needs 
as the Sample cache has been moved to the new CachingStatCalculator class.
In particular, Aggregate Report can now handle large numbers of samples.
Aggregate Report and Summary Report now allow column headers to be optionally excluded
Bug 49506 - Add .csv File Extension in open dialog box from "read from file" functionality of listeners
Bug 49545 - Formatted (parsed) view of Sample Result in Results Tree
Timers, Assertions, Config, Pre- & Post-Processors
Bug 47338 - XPath Extractor forces retrieval of document DTD
Added Comparison Assertion
Bug 47952 - Added JSR223 PreProcessor and PostProcessor
Added JSR223 Assertion
Added BSF Timer and JSR223 Timer
Bug 48511 - add parent,child,all selection to regex extractor
Add Sampler scope selection to XPathExtractor
Regular Expression Extractor, Response Assertion and Size Assertion can now be applied to a JMeter variable
Bug 46790 - CSV Data Set Config should be able to parse CSV headers
Bug 47565 - [Function] FileToString
Bug 47938 -  Adding some French translations for new elements
Bug 48714 -  add new French messages
Bug 47223 - Slow Aggregate Report Performance (StatCalculator)
Bug 47980 - hostname resolves to 127.0.0.1 - specifiying IP not possible
Bug 47943 - DisabledComponentRemover is not used in Start class
HeapDumper class for runtime generation of dumps
Basic read-only JavaMail provider implementation for reading raw mail files
Bug 49540 - Sort "Add" menus alphabetically
Non-functional changes
Beanshell, JavaMail and JMS API (Apache Geronimo) jars are now included in the binary archive.
Add TestBean Table Editor support
Removed all external libraries from SVN; added download_jars Ant target
Updated various jar files:
BeanShell - 2.0b4 => 2.0b5
Commons Codec - 1.3 => 1.4
Commons-Collections - 3.2 => 3.2.1
JTidy => r938
JUnit - 3.8.2 => 4.8.1
Logkit - 1.2 => 2.0
Xalan Serializer = 2.7.1 (previously erroneously shown as 2.9.1)
Xerces xml-apis = 1.3.04 (previously erroneously shown as 2.9.1)
Some jar files were renamed.
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