BreakTest 2026.07.08

BreakTest 2026.07.08 is a focused stability and GUI-assistance release built
from the changes since BreakTest 2026.07.07. It keeps the same Java 21+
baseline while improving fork/parallel execution, AI-assisted GUI repair
actions, and day-to-day desktop ergonomics.

Highlights

• Fixed Fork Controller lifecycle cleanup so completed forks are removed while
  the parent virtual user keeps running.
• Added ctx.getThread().stopForks() and ctx.getThread().stopForksNow() for
  Groovy/JSR223 scripts that need to end active fork branches from the main
  thread.
• Improved fork shutdown so timers, pacing waits, active fork samplers, and
  virtual-thread fork workers are woken promptly.
• Fixed fork branch behavior for "Start Next Thread Loop on error" so failed
  fork samples stop the fork branch locally instead of continuing to later
  requests.
• Hardened Parallel Controller execution so nested loop branches keep their own
  loop indexes and sampler package configuration is synchronized safely across
  concurrent branches.
• Added a GUI-backed clone_node_open_plan MCP tool so AI-assisted repair can
  copy full controller/sampler subtrees, including Transaction Controller
  pacing settings, without falling back to raw JMX reconstruction.
• Improved AI Helper and log-panel usability with Shift+Enter newlines in the
  JSR223 AI Helper prompt and a visible bottom-log resize boundary.
• Reduced noisy delay-interruption warnings during intentional fork/test stops.

Fork And Parallel Controller Stability

• Completed fork tasks, executors, and active-controller mappings are now
  cleaned up promptly instead of waiting for thread teardown.
• Fork workers now track current timers, samplers, and worker threads so
  graceful and forced fork stops can wake the correct in-flight operation.
• stopForks() requests graceful fork completion and wakes fork timers without
  stopping the main virtual user.
• stopForksNow() cancels active fork tasks, shuts down fork executors, and
  stops fork samplers that implement StoppableSampler.
• Intentional fork-stop interruptions no longer emit WARN-level "Loss of delay"
  timer messages.
• Fork timer/sampler bookkeeping now removes active entries by identity so
  equally configured sibling branches cannot remove the wrong entry.
• Fork branches now consume local logical error actions and reset
  LAST_SAMPLE_OK so fork control-flow decisions do not leak into the main
  virtual-user path.
• Parallel branch sampler configuration is protected from concurrent compiler
  state corruption.

AI-Assisted GUI Repair

• Added clone_node_open_plan to the BreakTest MCP bridge for cloning a node
  and its complete child subtree in the live GUI plan.
• The clone tool supports stable nodeId selectors from find_open_plan_nodes
  and path/index fallbacks, matching the existing move/delete structural tools.
• The clone operation uses the same full subtree copy path as the GUI Duplicate
  action, preserving element properties and children rather than rebuilding
  controllers from partial fields.

Desktop Polish

• The docked Logs / AI Auto Scripting panel now has a visible top divider and a
  wider split-pane drag target, making the resize area discoverable without
  hovering.
• The JSR223 AI Helper request text area now treats Shift+Enter as an explicit
  newline.
• Extractor and post-processor icons in the test-plan tree were aligned more
  closely with the Add menu iconography.

Benchmarks And Tests

• Added a JMH benchmark for Fork Controller capacity, including lightweight and
  more representative fork branch scenarios.
• Added regression tests for fork cleanup, fork stopping, fork error handling,
  nested parallel loop indexes, and tree icon rendering.

Compatibility Notes

• Java 21 or later is still required.
• Existing JMeter-compatible JMX files remain supported where practical.
• stopForks() and stopForksNow() are BreakTest extensions intended for
  scripts that explicitly need to manage asynchronous fork branches.