Issues

• EMA load_state_dict builds a ValueError but never raises it

  mosaicml/composer#3946 · Filter by author alleyxd opened on Oct 21, 2026

• Security: request to open a private disclosure channel

  mosaicml/composer#3942 · Filter by author mohammedix88 opened on Aug 13, 2026

• OptimizerMonitor Error with FSDP2

  bug
  mosaicml/composer#3920 · Filter by author aadyotb opened on Aug 29, 2025

• FSDP2 Not Compatible w/ HSDP (DeviceMesh Ignored By State)

  bug
  mosaicml/composer#3916 · Filter by author schopra8 opened on Jul 28, 2025
  1

• MLFlow logger: log system metrics for all nodes when rank_zero_only is True

  enhancement
  mosaicml/composer#3905 · Filter by author WeichenXu123 opened on Jul 16, 2025

• Incorrect autoresumption behavior with non-default CheckpointSaver

  bug
  mosaicml/composer#3902 · Filter by author aadyotb opened on Jul 16, 2025
  1

• Can't log to S3 during training

  bug
  mosaicml/composer#3892 · Filter by author hengoren opened on Jul 7, 2025

• Stuck when continuing training with auto_resume: true

  bug
  mosaicml/composer#3860 · Filter by author timpal0l opened on May 20, 2025
  10

• Support for FSDP2

  enhancement
  mosaicml/composer#3801 · Filter by author sjain-profluent opened on Apr 3, 2025

• Diverging runs when multiple resume

  bug
  mosaicml/composer#3725 · Filter by author maxrousseau opened on Nov 26, 2024
  4

• self.labels not set in eval_forward() for huggingfacemodel if self.use_logits=False

  bug
  mosaicml/composer#3622 · Filter by author andydelworth opened on Sep 20, 2024
  1

• Finetune Composer model with Streaming dataset example

  enhancement
  mosaicml/composer#3621 · Filter by author zhouhao001832050 opened on Sep 20, 2024
  1

• Documentation: Dead links to images stored in GCS buckets in "Analyzing Traces" Tutorial

  bug
  mosaicml/composer#3602 · Filter by author GMNGeoffrey opened on Sep 5, 2024

• Unable to script model

  bug
  mosaicml/composer#3584 · Filter by author callmekris opened on Aug 28, 2024
  5

• ONNX export with dynamic_axes does not work when applying BlurPool

  bug
  mosaicml/composer#3466 · Filter by author dneup opened on Jul 10, 2024
  1

  

• EVAL_STANDALONE_END documentation missing

  bug
  mosaicml/composer#3443 · Filter by author ewirbel opened on Jul 1, 2024
  1

• Computing train metrics at a given frequency

  enhancement
  mosaicml/composer#3411 · Filter by author Ghelfi opened on Jun 18, 2024
  1

• Autoresume and duration mismatch on reload

  bug
  mosaicml/composer#3357 · Filter by author antoinebrl opened on Jun 4, 2024
  12

• TypeError: Subscripted generics cannot be used with class and instance checks

  mosaicml/composer#3348 · Filter by author kbaltakys opened on May 31, 2024
  2

• Enable control over MLFlowLogger run_name str to match a pre-existing tag run_name in MLFlow and resume model training

  enhancement
  mosaicml/composer#3263 · Filter by author wolliq opened on May 7, 2024
  1

• Error when using Trainer.compile_config={} in DDP mode

  bug
  mosaicml/composer#3227 · Filter by author Ghelfi opened on Apr 30, 2024
  4

• Safer Checkpoint File Format

  enhancement
  mosaicml/composer#3181 · Filter by author mbway opened on Apr 5, 2024
  1

• Augment training batches with "on-the-fly" features

  mosaicml/composer#3171 · Filter by author Riccorl opened on Apr 3, 2024

• Allow smaller t_max in schedulers

  bug
  mosaicml/composer#3141 · Filter by author priba opened on Mar 22, 2024
  8

• Saving checkpoints on network drive fails due to symlinks

  bug
  mosaicml/composer#2942 · Filter by author eldarkurtic opened on Jan 31, 2024
  1