v0.9.0rc2

This is the release notes of v0.9.0rc2. See here for the complete list of solved issues and merged PRs.

New Features

• Web
  • Add stack display page on Mars Web (#2876)

Enhancements

• Avoid printing too many messages in Oscar (#2871)
• Expand slot scheduler to resource scheduler (#2846, thanks @zhongchun!)
• Optimized iterative tiling by pruning unrelated chunks (#2874)
• Optimize DataFrameIsin's tile (#2864)
• Add benchmark for serialization (#2901)
• [Ray] Ray client channel get recv when first complied (#2740, thanks @Catch-Bull!)
• Use bloom filter to optimize df.merge execution (#2895)
• Stop recording all mapper meta (#2900)
• [Ray] Use main pool as owner when autoscale disabled (#2878)

Bug fixes

• Fix XGBoost when some workers do not have evals data (#2861)
• Fix duplicate node iteration in GraphAssigner (#2857)
• Raise ActorNotExist when no supervisors available (#2859)
• Fix dtype infer in DataFrame arithmetic on datetime consts (#2879)
• Fix timeout for wait_task (#2883)
• Make sure error can be raised in Actor.__pre_destroy__ (#2887)

Tests

• Upgrade azure-pipelines to Python 3.9 (#2862)
• Adapt to official cancel of Github Actions (#2902)