Ray-2.31.0

Ray Libraries

Ray Data

🔨 Fixes:

• Fixed bug where preserve_order doesn’t work with file reads (#46135)

📖 Documentation:

• Added documentation for dataset.Schema (#46170)

Ray Train

💫 Enhancements:

• Add API for Ray Train run stats (#45711)

Ray Tune

💫 Enhancements:

• Missing stopping criterion should not error (just warn). (#45613)

📖 Documentation:

• Fix broken references in Ray Tune documentation (#45233)

Ray Serve

WARNING: the following default values will change in Ray 2.32:

• Default for max_ongoing_requests will change from 100 to 5.
• Default for target_ongoing_requests will change from 1 to 2.

💫 Enhancements:

• Optimize DeploymentStateManager.get_deployment_statuses (#45872)

🔨 Fixes:

• Fix logging error on passing traceback object into exc_info (#46105)
• Run del even if constructor is still in-progress (#45882)
• Spread replicas with custom resources in torch tune serve release test (#46093)
• [1k release test] don't run replicas on head node (#46130)

📖 Documentation:

• Remove todo since issue is fixed (#45941)

RLlib

🎉 New Features:

• IMPALA runs on the new API stack (with EnvRunners and ConnectorV2s). (#42085)
• SAC/DQN: Prioritized multi-agent episode replay buffer. (#45576)

💫 Enhancements:

• New API stack stability: Add systematic CI learning tests for all possible combinations of: [PPO|IMPALA] + [1CPU|2CPU|1GPU|2GPU] + [single-agent|multi-agent]. (#46162, #46161)

📖 Documentation:

• New API stack: Example script for action masking (#46146)
• New API stack: PyFlight example script cleanup (#45956)
• Old API stack: Enhanced ONNX example (+LSTM). (#43592)

Ray Core and Ray Clusters

Ray Core

💫 Enhancements:

• [runtime-env] automatically infer worker path when starting worker in container (#42304)

🔨 Fixes:

• On GCS restart, destroy not forget the unused workers. Fixing PG leaks. (#45854)
• Cancel lease requests before returning a PG bundle (#45919)
• Fix boost fiber stack overflow (#46133)

Thanks

Many thanks to all those who contributed to this release!

@jjyao, @kevin85421, @vincent-pli, @khluu, @simonsays1980, @sven1977, @rynewang, @can-anyscale, @richardsliu, @jackhumphries, @alexeykudinkin, @bveeramani, @ruisearch42, @shrekris-anyscale, @stephanie-wang, @matthewdeng, @zcin, @hongchaodeng, @ryanaoleary, @liuxsh9, @GeneDer, @aslonnie, @peytondmurray, @Bye-legumes, @woshiyyya, @scottjlee, @JoshKarpel