Elasticsearch-py: urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7f9e5db5d208>: Failed to establish a new connection: [Errno 113] No route to host

[laurentvv]

I often have this error, but script works :

GET http://x.x.x.x:9200/_nodes/_all/http [status:N/A request:2.992s]
Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/urllib3/connection.py", line 171, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw)
File "/usr/lib/python3.6/site-packages/urllib3/util/connection.py", line 79, in create_connection
raise err
File "/usr/lib/python3.6/site-packages/urllib3/util/connection.py", line 69, in create_connection
sock.connect(sa)
OSError: [Errno 113] No route to host

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/elasticsearch/connection/http_urllib3.py", line 172, in perform_request
response = self.pool.urlopen(method, url, body, retries=Retry(False), headers=request_headers, *kw)
File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 638, in urlopen
_stacktrace=sys.exc_info()[2])
File "/usr/lib/python3.6/site-packages/urllib3/util/retry.py", line 343, in increment
raise six.reraise(type(error), error, _stacktrace)
File "/usr/lib/python3.6/site-packages/urllib3/packages/six.py", line 686, in reraise
raise value
File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 600, in urlopen
chunked=chunked)
File "/usr/lib/python3.6/site-packages/urllib3/connectionpool.py", line 354, in _make_request
conn.request(method, url, *httplib_request_kw)
File "/usr/lib64/python3.6/http/client.py", line 1239, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/lib64/python3.6/http/client.py", line 1285, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/lib64/python3.6/http/client.py", line 1234, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib64/python3.6/http/client.py", line 1026, in _send_output
self.send(msg)
File "/usr/lib64/python3.6/http/client.py", line 964, in send
self.connect()
File "/usr/lib/python3.6/site-packages/urllib3/connection.py", line 196, in connect
conn = self._new_conn()
File "/usr/lib/python3.6/site-packages/urllib3/connection.py", line 180, in _new_conn
self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError: : Failed to establish a new connection: [Errno 113] No route to host

[fxdgear]

It sounds like there might be some problem in the connection between your python program and your Elasticsearch cluster.

Unfortunately I can't offer any advice here because there's not enough information.

How many nodes are in your cluster. Do you have them sitting behind a proxy or not? are you using x-pack or not? are you using a hosted service or hosting it your self.

There's a lot of factors here going on that can cause HTTP connection errors.

Any more info would be helpful.

thanks

[laurentvv]

More info :
3 nodes : 3 VM 8cpu 20go config script with these 3 nodes
No proxy
Not xpack
Hosting myself
No problem when i use rest with EL.

Laurent

Le ven. 10 août 2018 à 17:59, Nick Lang [e-mail] a écrit :

It sounds like there might be some problem in the connection between your
python program and your Elasticsearch cluster.

Unfortunately I can't offer any advice here because there's not enough
information.

How many nodes are in your cluster. Do you have them sitting behind a
proxy or not? are you using x-pack or not? are you using a hosted service
or hosting it your self.

There's a lot of factors here going on that can cause HTTP connection
errors.

Any more info would be helpful.

thanks

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[fxdgear]

@laurentvv thanks for that. This is helpful.

My next question is you say you have 3 nodes, 3 VM's. Where are those VM's running? Are they all on one computer? On 3 computers? In a data center? On your desk?

[fxdgear]

On a related note:

If you use curl instead of the python client. Do you experience similar errors?

[laurentvv]

Datacenter
No error with curl
These error don't block my script.
I have a result i don't understand why i have these error

Le ven. 10 août 2018 à 18:54, Nick Lang [e-mail] a écrit :

On a related note:

If you use curl instead of the python client. Do you experience similar
errors?

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[fxdgear]

the error you're getting is a result of a network connection or firewall rule or something.
It is actually not an error related to

1. Elasticsearch
2. Elasticsearch-py (this library)

This error is coming from urllib3. And the reason you're getting this error is because python can not make a connection to the HTTP host it's trying to connect to.

If we take out Elasticsearch and Elasticsearch-py. This error happens because a python process using URLlib3 can not connect to a networked host.

This is why I asked all the questions, because somewhere you have a network configuration that's causing the python process to not be able to connect to a host in your cluster. It could be related to anything from the VM firewall rules, the host firewall rules, the data center firewall rules, routers, etc..

[HonzaKral]

closing this issue since there is no new information. Please feel free to reopen with additional data. Thank you!

[roshanpati]

@laurentvv did you solve this issue?

[laurentvv]

Yes firewall problem, its ok now. thks

[johnprakashgithub]

How did you solve this issue? Is this really a firewall issue. I too face the same issue. Getting success in curl and failed in urllib3 HTTP connection.

[laurentvv]

Firewall block because too many connection, change rule of block

[manasatmicro]

How you blocked that can you explain?

[MLaure19]

Hello, I am also experimenting the same issue. Would be great to get some help.
Many thanks
Marie-Laure

[pointtester]

Hello, I am also experimenting with the same issue. Would be great to get some help.
Many thanks

[filiperivelli]

Same issue here. I'm using Lubuntu 18. How can I change the firewall rules? @laurentvv

[clarabez]

This happens when you have parallel competition for the connection. Try to finish opened connections from appium and run it again.

[ibanua]

Hi everyone. i am trying to solve the same problem. i closed the firewall but it didnt work..i am using windows