TimeoutError：工人启动失败

Question

我在jupyter笔记本电脑上的conda环境中工作。尝试使用以下过程创建客户端时

from dask.distributed import Client, progress

client = Client(processes = True)

出现以下错误

 TimeoutError                              Traceback (most recent call last)
    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/gen.py in

回调（f）827尝试：--

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/concurrent.py

在结果（self，timeout）237中尝试：--

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/util.py in

提升exc信息（exc信息）

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/gen.py in

运行（自我）1068其他：-

    /home/vlad/anaconda3/lib/python3.6/site-packages/distributed/deploy/local.py

在启动工人（自我，死亡超时，**kwargs）228个自我工人。移除（w）--

    TimeoutError: Worker failed to start

    During handling of the above exception, another exception occurred:

    TimeoutError                              Traceback (most recent call last)
    <ipython-input-26-9ebe205475b6> in <module>()
          3 
          4 # Use all 8 cores
    ----> 5 cluster = LocalCluster(processes = True, n_workers = 4)
          6 ##client = Client(processes = True)
          7 ##client = Client('localhost:8789')

    /home/vlad/anaconda3/lib/python3.6/site-packages/distributed/deploy/local.py

在init（self、n_-worker、线程/worker、进程、循环、启动、ip、调度程序\u端口、静默\u日志、诊断\u端口、服务、worker\u服务、服务\u-kwargs、异步、安全、**worker\u-kwargs）140 self.worker\u-kwargs['security']=security 141中--

    /home/vlad/anaconda3/lib/python3.6/site-packages/distributed/deploy/local.py

在开始（自我，**kwargs）177自我。_started=自我。_start（**kwargs）178其他：-

    /home/vlad/anaconda3/lib/python3.6/site-packages/distributed/deploy/local.py

同步（self、func、*args、**kwargs）170返回未来171其他：--

    /home/vlad/anaconda3/lib/python3.6/site-packages/distributed/utils.py

在同步（循环，功能，*args，**kwargs）275e.wait（10）276如果错误[0]：-

    /home/vlad/anaconda3/lib/python3.6/site-packages/six.py in reraise(tp, value, tb)
        691             if value.__traceback__ is not tb:
        692                 raise value.with_traceback(tb)
    --> 693             raise value
        694         finally:
        695             value = None

    /home/vlad/anaconda3/lib/python3.6/site-packages/distributed/utils.py

在f（）260如果超时不是无：261未来=gen.with_timeout（时间增量（秒=超时），未来）-

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/gen.py in

运行（自我）1053 1054尝试：-

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/concurrent.py

如果self.\u exc\u info不是None，则在结果（self，timeout）236中：237尝试：--

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/util.py in

提升exc信息（exc信息）

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/gen.py in

运行（自我）1061如果exc_info不是无： 1062尝试：-

    /home/vlad/anaconda3/lib/python3.6/site-packages/distributed/deploy/local.py

in_start（self、ip、n_workers）197 self.scheduler.start（scheduler_地址）198--

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/gen.py in

运行（自我）1053 1054尝试：-

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/concurrent.py

如果self.\u exc\u info不是None，则在结果（self，timeout）236中：237尝试：--

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/util.py in

提升exc信息（exc信息）

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/gen.py in

回调（f）826为f在儿童： 827尝试：--

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/concurrent.py

如果self.\u exc\u info不是None，则在结果（self，timeout）236中：237尝试：--

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/util.py in

提升exc信息（exc信息）

    /home/vlad/anaconda3/lib/python3.6/site-packages/tornado/gen.py in

运行（自身）1067 exc_info=无1068其他：-

    /home/vlad/anaconda3/lib/python3.6/site-packages/distributed/deploy/local.py

在_start_worker（self，death_timeout，**kwargs）227中，如果w.status==“closed”和self.scheduler.status==“running”：228 self.workers.remove（w）--

    TimeoutError: Worker failed to start

我怎样才能解决这个问题？我有以下设置
python版本：3.6.9
dask版本1.1.4
分布式版本1.26.0
tornado版本4.5
conda 4.6.14

Answer 1

通过将dask、distributed和tornado软件包分别更新到2.4.0、2.4.0和6.0.3版本，问题得以解决