問題描述：
使用nohup … > log.txt &命令訓(xùn)練深度學(xué)習(xí)模型時(shí)，輸出日志報(bào)錯(cuò)Connection to remote host was lost…

相關(guān)命令可見我的另一篇博客
如何使用遠(yuǎn)程linux服務(wù)器運(yùn)行深度學(xué)習(xí)項(xiàng)目

具體錯(cuò)誤：

[Errno 111] Connection refused Traceback (most recent call last):File "/usr/local/anaconda3/envs/p2p/lib/python3.6/site-packages/urllib3/connection.py", line 170, in _new_conn(self._dns_host, self.port), self.timeout, **extra_kwFile "/usr/local/anaconda3/envs/p2p/lib/python3.6/site-packages/urllib3/util/connection.py", line 96, in create_connectionraise errFile "/usr/local/anaconda3/envs/p2p/lib/python3.6/site-packages/urllib3/util/connection.py", line 86, in create_connectionsock.connect(sa) ConnectionRefusedError: [Errno 111] Connection refusedDuring handling of the above exception, another exception occurred:Traceback (most recent call last):File "/usr/local/anaconda3/envs/p2p/lib/python3.6/site-packages/urllib3/connectionpool.py", line 706, in urlopenchunked=chunked,File "/usr/local/anaconda3/envs/p2p/lib/python3.6/site-packages/urllib3/connectionpool.py", line 394, in _make_requestconn.request(method, url, **httplib_request_kw)File "/usr/local/anaconda3/envs/p2p/lib/python3.6/site-packages/urllib3/connection.py", line 234, in requestsuper(HTTPConnection, self).request(method, url, body=body, headers=headers)File "/usr/local/anaconda3/envs/p2p/lib/python3.6/http/client.py", line 1287, in requestself._send_request(method, url, body, headers, encode_chunked)File "/usr/local/anaconda3/envs/p2p/lib/python3.6/http/client.py", line 1333, in _send_requestself.endheaders(body, encode_chunked=encode_chunked)File "/usr/local/anaconda3/envs/p2p/lib/python3.6/http/client.py", line 1282, in endheadersself._send_output(message_body, encode_chunked=encode_chunked)File "/usr/local/anaconda3/envs/p2p/lib/python3.6/http/client.py", line 1042, in _send_outputself.send(msg)File "/usr/local/anaconda3/envs/p2p/lib/python3.6/http/client.py", line 980, in sendself.connect()File "/usr/local/anaconda3/envs/p2p/lib/python3.6/site-packages/urllib3/connection.py", line 200, in connectconn = self._new_conn()File "/usr/local/anaconda3/envs/p2p/lib/python3.6/site-packages/urllib3/connection.py", line 182, in _new_connself, "Failed to establish a new connection: %s" % e urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7f5bc655ce48>: Failed to establish a new connection: [Errno 111] Connection refusedDuring handling of the above exception, another exception occurred:Traceback (most recent call last):File "/usr/local/anaconda3/envs/p2p/lib/python3.6/site-packages/requests/adapters.py", line 449, in sendtimeout=timeoutFile "/usr/local/anaconda3/envs/p2p/lib/python3.6/site-packages/urllib3/connectionpool.py", line 756, in urlopenmethod, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]File "/usr/local/anaconda3/envs/p2p/lib/python3.6/site-packages/urllib3/util/retry.py", line 574, in incrementraise MaxRetryError(_pool, url, error or ResponseError(cause)) urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='localhost', port=2019): Max retries exceeded with url: /events (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f5bc655ce48>: Failed to establish a new connection: [Errno 111] Connection refused',)) ......(循環(huán)地報(bào)類似的錯(cuò)誤)

報(bào)錯(cuò)原因：
在訓(xùn)練中使用了visdom可視化工具對模型訓(xùn)練進(jìn)行可視化監(jiān)測，因?yàn)関isdom無法正常工作導(dǎo)致報(bào)錯(cuò)。
具體原因可能如下：
①在訓(xùn)練前沒使用python -m visdom.server命令開啟visdom服務(wù)
②在訓(xùn)練中因?yàn)閿嚅_了遠(yuǎn)程連接導(dǎo)致python -m visdom.server命令停止運(yùn)行，visdom無法正常工作
③設(shè)定的端口已被占用

解決方案：
1)在開始訓(xùn)練前使用lsof -i:端口號(hào)查看所需要使用的端口是否被占用（listened狀態(tài)),如果此時(shí)端口被占用，可以選擇結(jié)束此進(jìn)程kill -9 進(jìn)程id或者在程序中更改visdom需要使用的端口號(hào)（此處我就將端口號(hào)改成了2019）

2）在確認(rèn)端口無占用后，使用nohup pyhton -m visdom.server &開啟visdom服務(wù)，保證命令在后臺(tái)運(yùn)行不掛斷

如果更換端口號(hào)，請使用nohup python -m visdom.server -p 端口號(hào) &開啟visdom服務(wù) 對應(yīng)網(wǎng)址為http://localhost:端口號(hào)/

3）然后就可以開始愉快地訓(xùn)練啦~

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