Skip to main content
NetApp Knowledge Base

Intermittent unable to communicate with node alert on single node

Last Updated:

Applies to



  • Intermittent 'Unable to communicate with node' alert on single node that self-resolves within minutes.


  • Dynip.log from problematic node indicates:

[2023-08-22T14:24:52.795]DummyThread-1125493 -   ERROR --Exception in send_node_update Traceback(most recent call last):

  File"/usr/lib/python2.7/dist-packages/dynip/threads/", line155, in send_node_update

    response = send_request(msg_id, ipaddr,path, 'PUT', body)

  File"/usr/lib/python2.7/dist-packages/dynip/threads/", line116, in send_request

    response = urlopen(request, timeout=10,context=_ssl_context)

  File"/usr/lib/python2.7/", line 154, in urlopen

    return, data, timeout)

  File"/usr/lib/python2.7/", line 429, in open

    response = self._open(req, data)

  File"/usr/lib/python2.7/", line 447, in _open

    '_open', req)

  File"/usr/lib/python2.7/", line 407, in _call_chain

    result = func(*args)

  File"/usr/lib/python2.7/", line 1241, in https_open


  File"/usr/lib/python2.7/", line 1201, in do_open

    r = h.getresponse(buffering=True)

  File"/usr/lib/python2.7/", line 1137, in getresponse


  File"/usr/lib/python2.7/", line 448, in begin

    version, status, reason =self._read_status()

  File"/usr/lib/python2.7/", line 412, in _read_status

    raise BadStatusLine("No status linereceived - the server has closed the connection")

BadStatusLine:No status line received - the server has closed the connection


  • Dynip.log from other storage nodes indicates:

[2023-08-22T14:15:12.091]DummyThread-1123635 - WARNING -- Update to (NODE_NAME) (IP_ADDRESS) failed:('The read operation timed out',)

[2023-08-22T14:18:36.155]DummyThread-1123873 - INFO -- Received heartbeat from node (NODE_NAME) (IP_ADDRESS)

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.