class_docstr: Shuffle plugin for the scheduler
  This coordinates the individual worker plugins to ensure correctness
  and collects heartbeat messages for the dashboard.
  See Also
  --------
  ShuffleWorkerPlugin
class_docstr_tok: ["Shuffle","plugin","for","the","scheduler","This","coordinates","the","individual","worker","plugins","to","ensure","correctness","and","collects","heartbeat","messages","for","the","dashboard",".","See","Also","--","--","--","--","ShuffleWorkerPlugin"]
code: def _fail_on_workers(
      self, shuffle: SchedulerShuffleState, message: str
  ) -> None:
      worker_msgs = {
          worker: [
              {
                  "op": "shuffle-fail",
                  "shuffle_id": shuffle.id,
                  "run_id": shuffle.run_id,
                  "message": message,
              }
          ]
          for worker in shuffle.participating_workers
      }
      self.scheduler.send_all({}, worker_msgs)
  
imports: from __future__ import annotations
  import contextlib
  import itertools
  import logging
  from collections import defaultdict
  from typing import TYPE_CHECKING, Any
  from dask.typing import Key
  from distributed.diagnostics.plugin import SchedulerPlugin
  from distributed.metrics import time
  from distributed.protocol.pickle import dumps
  from distributed.protocol.serialize import ToPickle
  from distributed.shuffle._core import SchedulerShuffleState, ShuffleId, ShuffleRunSpec, ShuffleSpec, barrier_key, id_from_key
  from distributed.shuffle._worker_plugin import ShuffleWorkerPlugin
  from distributed.utils import log_errors
label_desc: Use image node_id 17 for calling the ShuffleSchedulerPlugin obj's underlying member method code with example usage: obj._fail_on_workers(shuffle, message) without return types