class_docstr: A rendezvous class for different actor/task processes to meet.
  
  To initialize an NCCL collective communication group, different
  actors/tasks spawned in Ray in a collective group needs to meet
  each other to synchronize the NCCLUniqueID. This class guarantees
  they meet via the NCCLUniqueIDStore, initialized on the rank=0
  process.
  
  Args:
      store_key: the unique store key, usually as a concatanation
          of group_name and communicator key. See `get_nccl_communicator`
          for more details.
docstr: Meet at the named actor store.
  
  Args:
      timeout_s: timeout in seconds.
  
  Return:
      None
docstr_tok: ["Meet","at","the","named","actor","store",".","Args",":","timeout_s",":","timeout","in","seconds",".","Return",":","None"]
code: def meet(self, timeout_s=180):
      """Meet at the named actor store.
  
      Args:
          timeout_s: timeout in seconds.
  
      Return:
          None
      """
      if timeout_s <= 0:
          raise ValueError(
              "The 'timeout' argument must be positive. "
              "Got '{}'.".format(timeout_s)
          )
      self._store_name = get_store_name(self._store_key)
      timeout_delta = datetime.timedelta(seconds=timeout_s)
      elapsed = datetime.timedelta(seconds=0)
      start_time = datetime.datetime.now()
      while elapsed < timeout_delta:
          try:
              logger.debug(
                  "Trying to meet at the store '{}'".format(
                      self._store_name
                  )
              )
              self._store = ray.get_actor(self._store_name)
          except ValueError:
              logger.debug(
                  "Failed to meet at the store '{}'."
                  "Trying again...".format(self._store_name)
              )
              time.sleep(1)
              elapsed = datetime.datetime.now() - start_time
              continue
          logger.debug("Successful rendezvous!")
          break
      if not self._store:
          raise RuntimeError(
              "Unable to meet other processes "
              "at the rendezvous store. If you are using "
              "P2P communication, please check if tensors "
              "are put in the correct GPU. "
          )
  
imports: import logging
  import datetime
  import time
  import ray
  import cupy
  from ray.util.collective.const import ENV
  from ray.util.collective.collective_group import nccl_util
  from ray.util.collective.collective_group.base_collective_group import BaseGroup
  from ray.util.collective.const import get_store_name
  from ray.util.collective.types import AllReduceOptions, BarrierOptions, Backend, ReduceOptions, BroadcastOptions, AllGatherOptions, ReduceScatterOptions, SendOptions, RecvOptions
  from ray.util.collective.collective_group.cuda_stream import get_stream_pool
label_desc: Use image node_id 2 for calling the Rendezvous obj's underlying member method code with example usage: obj.meet(timeout_s) without return types