--- title: "JMeter 6.0.0 Release Notes" description: "Apache JMeter 6.0.0 release notes with 23 improvements and 6 bug fixes, plus upgrade notes from the official changelog." url: https://docs.jmeter.ai/releases/6-0-0/ lastUpdated: 2026-10-01 source: docs.jmeter.ai --- # JMeter 6.0.0 Release Notes > **About these release notes** > This page lists every documented change shipped in Apache JMeter 6.0.0, generated from the official changelog. For download and upgrade guidance, see [Download JMeter](/reference/download-jmeter/). > **Highlights** > - **Java 17 or later is now required** to run JMeter; Java 21 is recommended. Kotlin 1.9+ is required for Kotlin-based scripts. > - **HiDPI mode is applied automatically** in the GUI, so the interface renders sharply on high-resolution displays. > - HTTP sampler changes: the original HTTP method is preserved when following 307/308 redirects, and `; charset=` is no longer appended automatically to `multipart/form-data` requests. > - JSON Extractor now supports trailing empty default values, so expressions like `${VAR:-}` are handled correctly. > - Dependency refresh: Apache Tika 3.x, Groovy 5.x, Saxon-HE 12.x, Bouncy Castle 1.82, json-path 2.10.0, and the Rhino JavaScript engine 1.8.0. > - New branding: the feather icon was replaced by an oak leaf in the JMeter logo. ## Change summary | Section | Changes | | --- | --- | | Changes | 23 | | Bug fixes | 6 | ## Changes #### General - [PR#6220](https://github.com/apache/jmeter/pull/6220) Require Java 17 or later for running JMeter - [PR#6550](https://github.com/apache/jmeter/pull/6550) Require Kotlin 1.9 or later for running JMeter - [PR#6274](https://github.com/apache/jmeter/pull/6274) Change references to old MySQL driver to new class `com.mysql.cj.jdbc.Driver` - [Issue#6352](https://github.com/apache/jmeter/issues/6352) Calculate delays in Open Model Thread Group and Precise Throughput Timer relative to start of Thread Group instead of the start of the test. - [Issue#6357](https://github.com/apache/jmeter/issues/6357)[PR#6358](https://github.com/apache/jmeter/pull/6358) Ensure writable directories when copying template files while report generation. - [PR#6509](https://github.com/apache/jmeter/pull/6509)[PR#6675](https://github.com/apache/jmeter/pull/6675) Synchronize recent file menu across multiple JVMs. Contributed by Corneliu C ([https://github.com/KingRabbid](https://github.com/KingRabbid)) - [PR#6596](https://github.com/apache/jmeter/pull/6596)Fallback to English locale when loading test plans that use string values for enum properties, so old sample plans load correctly even with non-English locales. #### HTTP Samplers and Test Script Recorder - [PR#5891](https://github.com/apache/jmeter/pull/5891)Skip Internet Explorer 6-9 conditional comment processing when fetching resource links - [Issue#5466](https://github.com/apache/jmeter/issues/5466)Allow enabling or disabling individual HTTP request arguments in the HTTP Sampler UI. Contributed by Pasquale Pochop (github.com/pochopsp) - [Issue#6250](https://github.com/apache/jmeter/issues/6250)Avoid adding ”; charset=” automatically to `multipart/form-data` requests to align behavior with modern HTTP clients. - [Issue#6080](https://github.com/apache/jmeter/issues/6080)Preserve the original HTTP method when following 307 and 308 redirects according to the HTTP specification. Contributed by LeeJiWon (github.com/dlwldnjs1009) - [Issue#6267](https://github.com/apache/jmeter/issues/6267)[PR#6268](https://github.com/apache/jmeter/pull/6268)Add a space between key and value after `:` in View Results Tree > Sampler result tab for better readability. #### Timers, Assertions, Config, Pre- & Post-Processors - [Issue#6448](https://github.com/apache/jmeter/issues/6448)Support trailing empty default values in JSON Extractor so expressions like `\${VAR:-}` are handled correctly. Contributed by Raul Almeida (github.com/ratacolita) - [PR#6596](https://github.com/apache/jmeter/pull/6596)Add a schema for ConstantThroughputTimer and use it to ensure required properties are initialized properly. #### Non-functional changes - Update Apache Tika to 3.x from 1.x to use the latest parser engine. - Update Saxon-HE to 12.x from 11.x for XSLT and XQuery processing. - Update Groovy to 5.x for the Groovy-based scripting environment. - Update Bouncy Castle to 1.82 for cryptographic operations. - Update json-path to 2.10.0 for JSON query expressions. - Update Neo4j Java driver to 6.x for Bolt-based database tests. - Update Rhino JavaScript engine to 1.8.0 for JSR-223 JavaScript execution. #### UI - [PR#6333](https://github.com/apache/jmeter/pull/6333)Apply HiDPI mode automatically when setting up the GUI so JMeter looks sharp on high-resolution displays. Contributed by Gabriele Coletta (github.com/gdmg92) - [PR#6656](https://github.com/apache/jmeter/pull/6656)Replace the previous feather icon with the new oak leaf in the JMeter logo. ## Bug fixes #### General - [PR#6654](https://github.com/apache/jmeter/pull/6654)[Issue#6611](https://github.com/apache/jmeter/issues/6611)Support JDK 25 and above for result collectors with empty file names - Trim whitespace when parsing numeric JMeter properties so accidental spaces do not silently change configuration values. - [PR#6372](https://github.com/apache/jmeter/pull/6372)Fix KeyManager logging when using CLI mode so keystore passwords are not incorrectly reported as missing. Contributed by Patrick Uiterwijk (patrick at puiterwijk.org) - [Issue#5937](https://github.com/apache/jmeter/issues/5937)Remove deprecated Log4j package scanning and configure plugin metadata processing to improve startup time and avoid deprecation warnings. Contributed by Piotr P. Karwasz (github.com/piotrgithub) - [PR#6620](https://github.com/apache/jmeter/pull/6620)Fix report generation paths so dashboard output files are created in the correct location after internal refactoring. - [Bug 6456](https://bz.apache.org/bugzilla/show_bug.cgi?id=6456)Handle malformed percent-encoded URLs gracefully when recording HTTP traffic, logging a warning instead of failing the recording. ## Thanks We thank all contributors mentioned in bug and improvement sections above: - Raul Almeida (github.com/ratacolita) - Pasquale Pochop (github.com/pochopsp) - Gabriele Coletta (github.com/gdmg92) - Patrick Uiterwijk (patrick at puiterwijk.org) - Piotr P. Karwasz (github.com/piotrgithub) We also thank bug reporters who helped us improve JMeter. Apologies if we have omitted anyone else. ## Useful links - [Download JMeter](/reference/download-jmeter/) - [Getting started guide](/getting-started/get-started/) - [All release notes](/releases/) - [Current changes page](/user-manual/changes/) - [History of previous changes](/user-manual/changes-history/)