py2neo SocketError: Connection refused, but curl works - python

I'm trying to get a Flask/Neo4j app set up on a remote Ubuntu server, and I've run into a problem that I haven't been able to figure out. My app uses py2neo, but when it tries to connect to the graph, the app crashes and the Neo4j process seems to stop. I've tried connecting in a python shell like this...
test = Graph('http://localhost:7474/db/data/',username='neo4j',password='myPassword')
which fails, and also renders neo4j inoperative until I restart it. However, these return 200 responses (and the web interface also works):
curl -u neo4j http://localhost:7474/db/data/
requests.get('http://localhost:7474/db/data/', auth=('neo4j','myPassword'))
I've tried to provide more information than this similar question, because it seems like the connection works from everywhere but py2neo.
Here's the full traceback:
Traceback (most recent call last):
File "/home/deploy/toponimika/toponimikaenv/lib/python3.5/site-packages/py2neo/database/__init__.py", line 318, in __new__
inst = cls.__instances[key]
KeyError: (<class 'py2neo.database.Graph'>, <ServerAddress settings={'http_port': 7474, 'host': 'localhost'}>, 'data')
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/deploy/toponimika/toponimikaenv/lib/python3.5/site-packages/py2neo/packages/httpstream/http.py", line 322, in submit
response = send()
File "/home/deploy/toponimika/toponimikaenv/lib/python3.5/site-packages/py2neo/packages/httpstream/http.py", line 317, in send
http.request(xstr(method), xstr(uri.absolute_path_reference), body, headers)
File "/usr/lib/python3.5/http/client.py", line 1106, in request
self._send_request(method, url, body, headers)
File "/usr/lib/python3.5/http/client.py", line 1151, in _send_request
self.endheaders(body)
File "/usr/lib/python3.5/http/client.py", line 1102, in endheaders
self._send_output(message_body)
File "/usr/lib/python3.5/http/client.py", line 934, in _send_output
self.send(msg)
File "/usr/lib/python3.5/http/client.py", line 877, in send
self.connect()
File "/home/deploy/toponimika/toponimikaenv/lib/python3.5/site-packages/py2neo/packages/httpstream/http.py", line 80, in connect
self.source_address)
File "/usr/lib/python3.5/socket.py", line 711, in create_connection
raise err
File "/usr/lib/python3.5/socket.py", line 702, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/deploy/toponimika/toponimikaenv/lib/python3.5/site-packages/py2neo/database/__init__.py", line 327, in __new__
use_bolt = version_tuple(inst.__remote__.get().content["neo4j_version"]) >= (3,)
File "/home/deploy/toponimika/toponimikaenv/lib/python3.5/site-packages/py2neo/database/http.py", line 154, in get
response = self.__base.get(headers=headers, redirect_limit=redirect_limit, **kwargs)
File "/home/deploy/toponimika/toponimikaenv/lib/python3.5/site-packages/py2neo/packages/httpstream/http.py", line 966, in get
return self.__get_or_head("GET", if_modified_since, headers, redirect_limit, **kwargs)
File "/home/deploy/toponimika/toponimikaenv/lib/python3.5/site-packages/py2neo/packages/httpstream/http.py", line 943, in __get_or_head
return rq.submit(redirect_limit=redirect_limit, **kwargs)
File "/home/deploy/toponimika/toponimikaenv/lib/python3.5/site-packages/py2neo/packages/httpstream/http.py", line 433, in submit
http, rs = submit(self.method, uri, self.body, self.headers)
File "/home/deploy/toponimika/toponimikaenv/lib/python3.5/site-packages/py2neo/packages/httpstream/http.py", line 362, in submit
raise SocketError(code, description, host_port=uri.host_port)
py2neo.packages.httpstream.http.SocketError: Connection refused
Anything I might try to figure out what's going on would be appreciated.


Changed to http://username:password#localhost:7474/db/data/ and it works!
Example:
test = Graph('http://username:password#localhost:7474/db/data/')


I had the same issue, solved with a simple upgrade of pip version.
pip install --upgrade py2neo

Related

Connection timeout error while reading a file from HDFS using Python

I have created a single node HDFS in a VM (hadoop.master, IP: 192.168.12.52). The file etc/hadoop/core-site.xml has the following configuration for the namenode:
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://master.hadoop:9000/</value>
</property>
</configuration>
I want to read a file from the HDFS on my local, physical desktop. For that, this is my code, which I've saved in a file named hdfs_read.py:
from hdfs import InsecureClient
client = InsecureClient('http://192.168.12.52:9000')
with client.read('/opt/hadoop/LICENSE.txt') as reader:
features = reader.read()
print(features)
Now when I run it, I get the following timeout error:
$ python3 hdfs_read.py
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 137, in _new_conn
(self.host, self.port), self.timeout, **extra_kw)
File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 91, in create_connection
raise err
File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 81, 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/dist-packages/urllib3/connectionpool.py", line 560, in urlopen
body=body, headers=headers)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 354, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python3.6/http/client.py", line 1239, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1285, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1234, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1026, in _send_output
self.send(msg)
File "/usr/lib/python3.6/http/client.py", line 964, in send
self.connect()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 162, in connect
conn = self._new_conn()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 146, in _new_conn
self, "Failed to establish a new connection: %s" % e)
requests.packages.urllib3.exceptions.NewConnectionError: <requests.packages.urllib3.connection.HTTPConnection object at 0x7f2d88cef2b0>: Failed to establish a new connection: [Errno 113] No route to host
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 376, in send
timeout=timeout
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 610, in urlopen
_stacktrace=sys.exc_info()[2])
File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 273, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
requests.packages.urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='192.168.12.52', port=9000): Max retries exceeded with url: /webhdfs/v1/home/edhuser/testdata.txt?user.name=embs&offset=0&op=OPEN (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x7f2d88cef2b0>: Failed to establish a new connection: [Errno 113] No route to host',))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "hdfs_read_local.py", line 3, in <module>
with client.read('/home/edhuser/testdata.txt') as reader:
File "/usr/lib/python3.6/contextlib.py", line 81, in __enter__
return next(self.gen)
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 678, in read
buffersize=buffer_size,
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 118, in api_handler
raise err
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 107, in api_handler
**self.kwargs
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 207, in _request
**kwargs
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 468, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 576, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 437, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='192.168.12.52', port=9000): Max retries exceeded with url: /webhdfs/v1/home/edhuser/testdata.txt?user.name=embs&offset=0&op=OPEN (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x7f2d88cef2b0>: Failed to establish a new connection: [Errno 113] No route to host',))
Error in sys.excepthook:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 63, in apport_excepthook
from apport.fileutils import likely_packaged, get_recent_crashes
File "/usr/lib/python3/dist-packages/apport/__init__.py", line 5, in <module>
from apport.report import Report
File "/usr/lib/python3/dist-packages/apport/report.py", line 30, in <module>
import apport.fileutils
File "/usr/lib/python3/dist-packages/apport/fileutils.py", line 23, in <module>
from apport.packaging_impl import impl as packaging
File "/usr/lib/python3/dist-packages/apport/packaging_impl.py", line 23, in <module>
import apt
File "/usr/lib/python3/dist-packages/apt/__init__.py", line 23, in <module>
import apt_pkg
ModuleNotFoundError: No module named 'apt_pkg'
Original exception was:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 137, in _new_conn
(self.host, self.port), self.timeout, **extra_kw)
File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 91, in create_connection
raise err
File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 81, 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/dist-packages/urllib3/connectionpool.py", line 560, in urlopen
body=body, headers=headers)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 354, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python3.6/http/client.py", line 1239, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1285, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1234, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1026, in _send_output
self.send(msg)
File "/usr/lib/python3.6/http/client.py", line 964, in send
self.connect()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 162, in connect
conn = self._new_conn()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 146, in _new_conn
self, "Failed to establish a new connection: %s" % e)
requests.packages.urllib3.exceptions.NewConnectionError: <requests.packages.urllib3.connection.HTTPConnection object at 0x7f2d88cef2b0>: Failed to establish a new connection: [Errno 113] No route to host
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 376, in send
timeout=timeout
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 610, in urlopen
_stacktrace=sys.exc_info()[2])
File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 273, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
requests.packages.urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='192.168.12.52', port=9000): Max retries exceeded with url: /webhdfs/v1/home/edhuser/testdata.txt?user.name=embs&offset=0&op=OPEN (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x7f2d88cef2b0>: Failed to establish a new connection: [Errno 113] No route to host',))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "hdfs_read.py", line 3, in <module>
with client.read('/home/edhuser/testdata.txt') as reader:
File "/usr/lib/python3.6/contextlib.py", line 81, in __enter__
return next(self.gen)
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 678, in read
buffersize=buffer_size,
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 118, in api_handler
raise err
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 107, in api_handler
**self.kwargs
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 207, in _request
**kwargs
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 468, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 576, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 437, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='192.168.12.52', port=9000): Max retries exceeded with url: /webhdfs/v1/home/edhuser/testdata.txt?user.name=embs&offset=0&op=OPEN (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x7f2d88cef2b0>: Failed to establish a new connection: [Errno 113] No route to host',))
How can I fix this connection issue? Am I using a wrong port? I though the port that the namenode is using is specified in the core-site.xml, which I have shown above as stating 9000 for the port. In any case, I have tried all the default ports 50070, 8020, 8048 mentioned in the hadoop installation doc for various purposes, and I still get the same error. Instead of client = InsecureClient('http://192.168.12.52:9000'), should I be using client = InsecureClient('hdfs://192.168.12.52:9000'), or maybe client = InsecureClient('file:///192.168.12.52:9000'), or something like that? I have seen these elsewhere at various times.
I can access the HDFS in web by the way, as shown in the screenshot below:
Also, even if it connects successfully, I think I may not be giving the right file path (/opt/hadoop/README.txt). I gave this file path as this is what I see when I do search for the list of files and directories in the hadoop installation directory, which is /opt/hadoop:
$ ls /opt/hadoop/
bin lib read_from_hdfs.py write_to_hdfs_2.py
connect_to_hdfs.py libexec README.txt write_to_hdfs3.py
etc LICENSE.txt sbin write_to_hdfs.py
hdfs_read_write.py logs share
include NOTICE.txt test_storage
But I know that HDFS is separate, and maybe I copied the contents of my HDFS into the local machine by doing hdfs dfs -get /test_storage/ ./ before, which is why its showing these files. But when I search for the files in the path of the namenode, it returns some illegible files:
$ls /opt/volume/namenode/current/
edits_0000000000000000001-0000000000000000002
edits_0000000000000000003-0000000000000000010
edits_0000000000000000011-0000000000000000012
edits_0000000000000000013-0000000000000000015
edits_0000000000000000016-0000000000000000023
edits_0000000000000000024-0000000000000000025
edits_0000000000000000026-0000000000000000032
edits_0000000000000000033-0000000000000000033
edits_0000000000000000034-0000000000000000035
edits_0000000000000000036-0000000000000000037
edits_0000000000000000038-0000000000000000039
edits_0000000000000000040-0000000000000000041
edits_0000000000000000042-0000000000000000043
edits_0000000000000000044-0000000000000000045
edits_0000000000000000046-0000000000000000047
edits_0000000000000000048-0000000000000000049
edits_0000000000000000050-0000000000000000051
edits_0000000000000000052-0000000000000000053
edits_0000000000000000054-0000000000000000055
edits_0000000000000000056-0000000000000000057
edits_0000000000000000058-0000000000000000059
edits_0000000000000000060-0000000000000000061
edits_0000000000000000062-0000000000000000063
edits_0000000000000000064-0000000000000000065
edits_0000000000000000066-0000000000000000067
edits_0000000000000000068-0000000000000000070
edits_0000000000000000071-0000000000000000072
edits_0000000000000000073-0000000000000000074
edits_0000000000000000075-0000000000000000076
edits_0000000000000000077-0000000000000000078
edits_inprogress_0000000000000000079
fsimage_0000000000000000076
fsimage_0000000000000000076.md5
fsimage_0000000000000000078
fsimage_0000000000000000078.md5
seen_txid
VERSION
So, if I am specifying the file path to read wrongly, what is the correct file path to use?
EDIT: Upon changing the port to 50070 (i.e., client = InsecureClient('http://192.168.12.52:50070')), I get the following error:
$ python3 hdfs_read_local.py
Traceback (most recent call last):
File "hdfs_read.py", line 3, in <module>
with client.read('/opt/hadoop/LICENSE.txt') as reader:
File "/usr/lib/python3.6/contextlib.py", line 81, in __enter__
return next(self.gen)
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 678, in read
buffersize=buffer_size,
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 112, in api_handler
raise err
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 107, in api_handler
**self.kwargs
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 210, in _request
_on_error(response)
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 50, in _on_error
raise HdfsError(message, exception=exception)
hdfs.util.HdfsError: File /opt/hadoop/LICENSE.txt not found.
EDIT2: Upon modifying the file path from /opt/hadoop/LICENSE.txt
to /test_storage/LICENSE.txt, which seems to be the correct HDFS path, Iand running the python script, I get the following error:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 137, in _new_conn
(self.host, self.port), self.timeout, **extra_kw)
File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 91, in create_connection
raise err
File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 81, 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/dist-packages/urllib3/connectionpool.py", line 560, in urlopen
body=body, headers=headers)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 354, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python3.6/http/client.py", line 1239, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1285, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1234, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib/python3.6/http/client.py", line 1026, in _send_output
self.send(msg)
File "/usr/lib/python3.6/http/client.py", line 964, in send
self.connect()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 162, in connect
conn = self._new_conn()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 146, in _new_conn
self, "Failed to establish a new connection: %s" % e)
requests.packages.urllib3.exceptions.NewConnectionError: <requests.packages.urllib3.connection.HTTPConnection object at 0x7f2e87867400>: Failed to establish a new connection: [Errno 113] No route to host
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 376, in send
timeout=timeout
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 610, in urlopen
_stacktrace=sys.exc_info()[2])
File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 273, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
requests.packages.urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='pr2.embs', port=50075): Max retries exceeded with url: /webhdfs/v1/test_storage/LICENSE.txt?op=OPEN&user.name=embs&namenoderpcaddress=192.168.12.52:9000&offset=0 (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x7f2e87867400>: Failed to establish a new connection: [Errno 113] No route to host',))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "hdfs_read_local.py", line 3, in <module>
with client.read('/test_storage/LICENSE.txt') as reader:
File "/usr/lib/python3.6/contextlib.py", line 81, in __enter__
return next(self.gen)
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 678, in read
buffersize=buffer_size,
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 118, in api_handler
raise err
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 107, in api_handler
**self.kwargs
File "/home/embs/.local/lib/python3.6/site-packages/hdfs/client.py", line 207, in _request
**kwargs
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 468, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 597, in send
history = [resp for resp in gen] if allow_redirects else []
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 597, in <listcomp>
history = [resp for resp in gen] if allow_redirects else []
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 195, in resolve_redirects
**adapter_kwargs
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 576, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 437, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='pr2.embs', port=50075): Max retries exceeded with url: /webhdfs/v1/test_storage/LICENSE.txt?op=OPEN&user.name=embs&namenoderpcaddress=192.168.12.52:9000&offset=0 (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x7f2e87867400>: Failed to establish a new connection: [Errno 113] No route to host',))

As stated here link this python library is using webhdfs. If you want to test both the host and the file path are correct you can use the following command curl -i 'http://192.168.12.52:50070/webhdfs/v1/<PATH>?op=LISTSTATUS'. This will list a directory in hdfs. if you get that right you can use the same "config" in python.
from hdfs import InsecureClient
client = InsecureClient('http://192.168.12.52:50070')
with client.read('<hdfs_path>') as reader:
features = reader.read()
print(features)

http://192.168.12.52:9000
9000 is an RPC port. 50070 is the default HTTP WebHDFS port.
You might get No route to host if WebHDFS is disabled, or the datanode is not exposing port 50075 (the datanode http address) because it's down, or you changed that property
client.read('/opt/hadoop/LICENSE.txt')
You're running HDFS in pseudo distributed mode, but you're trying to read a local file. /opt does not exist in HDFS by default, and you've only ran a local ls... You should instead be using hadoop fs -ls /opt to see what files do exist at the path you're trying to open
But when I search for the files in the path of the namenode, it returns some illegible files:
Your files are not stored in the namenode... Their metadata is
Your files are stored in the datanode data directories, but as blocks, not as human-readable content
You can run this command to get a list of all the blocks and their locations
hdfs fsck /path/to/file.txt -files -blocks

There could be a problem with network configuration. Try this tweaked code for the time-being:
from hdfs import InsecureClient
client = InsecureClient('http://0.0.0.0:50070')
with client.read('/test-storage/LICENSE.txt') as reader:
features = reader.read()
print(features)
Read about IP Address 0.0.0.0

Hi I'm faced similar issue. It' looks like port is right. Im my case I was able to get list of dirs, but couldn't write any data. Issue was in my vpn which blocks some of the ports, and read and write uses different one.

How do I access files on a hadoop file system present on a different server from my local machine?

I have a local machine (local_user#local_machine). And a hadoop file system is present on a different server (some_user#another_server). One of the users in the hadoop server is named target_user. How do I access files present in target_user from local_user#local_machine? More precisely, say there's a file /user/target_user/test.txt present in the HDFS on some_user#another_server. What is the correct file path I should use when accessing /user/target_user/test.txt from local_user#local_machine?
I can access the file in the hdfs itself with hdfs dfs -cat /user/target_user/test.txt. But I can't access the file from my local machine using a python script I have written to read & write from the HDFS (that takes 3 arguments - local file path, remote file path, and read or write), most probably because I am not giving the correct path.
I have tried the following, but none of them work:
$ #local_user#local_machine
$ python3 rw_hdfs.py ./to_local_test.txt /user/target_user/test.txt read
$ python3 rw_hdfs.py ./to_local_test.txt some_user#another_server/user/target_user/test.txt read
The all give the exact same error:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 377, in _make_request
httplib_response = conn.getresponse(buffering=True)
TypeError: getresponse() got an unexpected keyword argument 'buffering'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 560, in urlopen
body=body, headers=headers)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 379, in _make_request
httplib_response = conn.getresponse()
File "/usr/lib/python3.5/http/client.py", line 1197, in getresponse
response.begin()
File "/usr/lib/python3.5/http/client.py", line 297, in begin
version, status, reason = self._read_status()
File "/usr/lib/python3.5/http/client.py", line 279, in _read_status
raise BadStatusLine(line)
http.client.BadStatusLine:
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 376, in send
timeout=timeout
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 610, in urlopen
_stacktrace=sys.exc_info()[2])
File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 247, in increment
raise six.reraise(type(error), error, _stacktrace)
File "/usr/lib/python3/dist-packages/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 560, in urlopen
body=body, headers=headers)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 379, in _make_request
httplib_response = conn.getresponse()
File "/usr/lib/python3.5/http/client.py", line 1197, in getresponse
response.begin()
File "/usr/lib/python3.5/http/client.py", line 297, in begin
version, status, reason = self._read_status()
File "/usr/lib/python3.5/http/client.py", line 279, in _read_status
raise BadStatusLine(line)
requests.packages.urllib3.exceptions.ProtocolError: ('Connection aborted.', BadStatusLine('\x15\x03\x03\x00\x02\x02\n',))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "python_hdfs.py", line 63, in <module>
status, name, nnaddress= check_node_status(node)
File "python_hdfs.py", line 18, in check_node_status
request = requests.get("%s/jmx?qry=Hadoop:service=NameNode,name=NameNodeStatus"%name,verify=False).json()
File "/usr/lib/python3/dist-packages/requests/api.py", line 67, in get
return request('get', url, params=params, **kwargs)
File "/usr/lib/python3/dist-packages/requests/api.py", line 53, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 468, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 576, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 426, in send
raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', BadStatusLine('\x15\x03\x03\x00\x02\x02\n',))

More precisely, say there's a file /user/target_user/test.txt present in the HDFS on some_user#another_server
First, HDFS isn't a single directory on one machine. Therefore trying to access it like that doesn't make sense.
Secondly, whatever Python library you're using is trying to communicate over WebHDFS, which you must specifically enable for the cluster.
https://hadoop.apache.org/docs/r2.7.3/hadoop-project-dist/hadoop-hdfs/WebHDFS.html
BadStatusLine in the error might indicate that you're dealing with a Kerberized, secure cluster, so you might need a different way to read files
For example, PySpark or the Ibis project

socket.error: [Errno 111] Connection refused linux

I just started with Nagios XI and i got this error and i cant find the right answer does anyone know what the problem is?
I already checked the proxy and i cant find where the problem is.
The code is to get notifications messages through whats app.
[root#localhost ~]# yowsup-cli registration --requestcode sms --phone 316******** --cc 31 --mcc 204 --mnc 10
yowsup-cli v2.0.15
yowsup v2.5.0
Copyright (c) 2012-2016 Tarek Galal
http://www.openwhatsapp.org
This software is provided free of charge. Copying and redistribution is
encouraged.
If you appreciate this software and you would like to support future
development please consider donating:
http://openwhatsapp.org/yowsup/donate
Traceback (most recent call last):
File "/usr/bin/yowsup-cli", line 368, in <module>
if not parser.process():
File "/usr/bin/yowsup-cli", line 189, in process
self.handleRequestCode(self.args["requestcode"], config)
File "/usr/bin/yowsup-cli", line 208, in handleRequestCode
result = codeReq.send()
File "/usr/lib/python2.6/site-packages/yowsup/registration/coderequest.py", line 62, in send
res = super(WACodeRequest, self).send(parser)
File "/usr/lib/python2.6/site-packages/yowsup/common/http/warequest.py", line 70, in send
return self.sendGetRequest(parser)
File "/usr/lib/python2.6/site-packages/yowsup/common/http/warequest.py", line 108, in sendGetRequest
self.response = WARequest.sendRequest(host, port, path, headers, params, "GET")
File "/usr/lib/python2.6/site-packages/yowsup/common/http/warequest.py", line 164, in sendRequest
conn.request(reqType, path, params, headers);
File "/usr/lib64/python2.6/httplib.py", line 973, in request
self._send_request(method, url, body, headers)
File "/usr/lib64/python2.6/httplib.py", line 1010, in _send_request
self.endheaders()
File "/usr/lib64/python2.6/httplib.py", line 967, in endheaders
self._send_output()
File "/usr/lib64/python2.6/httplib.py", line 831, in _send_output
self.send(msg)
File "/usr/lib64/python2.6/httplib.py", line 790, in send
self.connect()
File "/usr/lib64/python2.6/httplib.py", line 1171, in connect
sock = socket.create_connection((self.host, self.port), self.timeout)
File "/usr/lib64/python2.6/socket.py", line 567, in create_connection
raise error, msg
socket.error: [Errno 111] Connection refused
thanks in advance.

Posting Content to Friendica using Python

I'm working on a project that is written in Python and needs to post updates to a Friendica server and interact using various APIs available. However, I have had very limited API usage experience and so I'm unsure of how to code this functionality in Python. There is an example on the Friendica GitHub however the Python example would not work for me. There is a Python3 module https://bitbucket.org/tobiasd/python-friendica/overview, however when trying to connect using this in a test script as follows:
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import friendica
# make a new instance of friendica
f = friendica.friendica (server = '10.211.55.23/api/statuses/update', username = 'newtest', password = 'klaup8744')
# check that we are logged in
f.account_verify_credentials()
# get the current notifications
print (f.ping())
# post something with the default settings
f.statuses_update( status = "here is the message you are going to post" )
it would refuse the connection with the following message:
Traceback (most recent call last):
File "/usr/lib/python3.4/urllib/request.py", line 1182, in do_open
h.request(req.get_method(), req.selector, req.data, headers)
File "/usr/lib/python3.4/http/client.py", line 1088, in request
self._send_request(method, url, body, headers)
File "/usr/lib/python3.4/http/client.py", line 1126, in _send_request
self.endheaders(body)
File "/usr/lib/python3.4/http/client.py", line 1084, in endheaders
self._send_output(message_body)
File "/usr/lib/python3.4/http/client.py", line 922, in _send_output
self.send(msg)
File "/usr/lib/python3.4/http/client.py", line 857, in send
self.connect()
File "/usr/lib/python3.4/http/client.py", line 1223, in connect
super().connect()
File "/usr/lib/python3.4/http/client.py", line 834, in connect
self.timeout, self.source_address)
File "/usr/lib/python3.4/socket.py", line 512, in create_connection
raise err
File "/usr/lib/python3.4/socket.py", line 503, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "test_1.py", line 12, in <module>
print (f.ping())
File "/home/sambraidley/Desktop/friendica.py", line 851, in ping
res = urlopen(self.protocol()+self.apipath[:-4]+'/ping').read().decode('utf-8')
File "/usr/lib/python3.4/urllib/request.py", line 161, in urlopen
return opener.open(url, data, timeout)
File "/usr/lib/python3.4/urllib/request.py", line 463, in open
response = self._open(req, data)
File "/usr/lib/python3.4/urllib/request.py", line 481, in _open
'_open', req)
File "/usr/lib/python3.4/urllib/request.py", line 441, in _call_chain
result = func(*args)
File "/usr/lib/python3.4/urllib/request.py", line 1225, in https_open
context=self._context, check_hostname=self._check_hostname)
File "/usr/lib/python3.4/urllib/request.py", line 1184, in do_open
raise URLError(err)
urllib.error.URLError: <urlopen error [Errno 111] Connection refused>
The friendica Python3 module can be found at the following https://bitbucket.org/tobiasd/python-friendica/src/b0b75ae80a6e747e8724b1ae36972ebfd939beb5/friendica.py?fileviewer=file-view-default
My Friendica server is setup within a VM with the address 10.211.55.23, with test credentials of username = 'newtest' and password 'klaup8744' and it is fully working as using the curl example code to post an update worked perfectly, as follows:
/usr/bin/curl -u newtest:klaup8744 10.211.55.23/api/statuses/update.xml -d source="Testing" -d status="This is a test status"

According to the source link you posted, friendica uses https by default. Your successful curl request is using http.
Try instantiating friendica it using http:
f = friendica.friendica (server = '10.211.55.23/api/statuses/update',
username = 'newtest', password = 'klaup8744', useHTTPS=False)

Troubleshooting Python API Error Message (Highrise API)

I ran this script (https://github.com/mikehking/highrise-analysis/blob/master/highrise-analysis.py) to calculate usage by user for the Highrise CRM system (www.highrisehq.com). Recently, the script has been returning this error; but I'm not sure what it is telling me -- can anyone help with where I should be looking to fix this?
Thanks
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 557, in urlopen
body=body, headers=headers)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 382, in _make_request
conn.request(method, url, **httplib_request_kw)
File "/usr/lib/python3.4/http/client.py", line 1065, in request
self._send_request(method, url, body, headers)
File "/usr/lib/python3.4/http/client.py", line 1103, in _send_request
self.endheaders(body)
File "/usr/lib/python3.4/http/client.py", line 1061, in endheaders
self._send_output(message_body)
File "/usr/lib/python3.4/http/client.py", line 906, in _send_output
self.send(msg)
File "/usr/lib/python3.4/http/client.py", line 841, in send
self.connect()
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 133, in connect
ssl_version=resolved_ssl_version)
File "/usr/lib/python3/dist-packages/urllib3/util.py", line 619, in ssl_wrap_socket
return context.wrap_socket(sock, server_hostname=server_hostname)
File "/usr/lib/python3.4/ssl.py", line 364, in wrap_socket
_context=self)
File "/usr/lib/python3.4/ssl.py", line 578, in __init__
self.do_handshake()
File "/usr/lib/python3.4/ssl.py", line 805, in do_handshake
self._sslobj.do_handshake()
ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:598)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 330, in send
timeout=timeout
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 590, in urlopen
raise SSLError(e)
urllib3.exceptions.SSLError: EOF occurred in violation of protocol (_ssl.c:598)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/mikehking/workspace/highrise-analysis/highrise-analysis.py", line 188, in <module>
Create_Notes_Backup(PROD_API_KEY, PROD_API_USR, 'highrise-production-notes.bak', 'highrise-production-users.bak', 'highrise-production-people.bak', 'highrise-production-cases.bak', trailing_days = 365) # Production Environment
File "/home/mikehking/workspace/highrise-analysis/highrise-analysis.py", line 71, in Create_Notes_Backup
tmp_notes = high.get_person_notes(person.highrise_id)
File "/usr/local/lib/python3.4/dist-packages/highton/highton.py", line 436, in get_person_notes
return self._get_notes(subject_id, 'people')
File "/usr/local/lib/python3.4/dist-packages/highton/highton.py", line 433, in _get_notes
highrise_type, subject_id)), Note)
File "/usr/local/lib/python3.4/dist-packages/highton/highton.py", line 115, in _get_data
content = self._get_request(endpoint, params).content
File "/usr/local/lib/python3.4/dist-packages/highton/highton.py", line 44, in _get_request
params=params,
File "/usr/lib/python3/dist-packages/requests/api.py", line 55, in get
return request('get', url, **kwargs)
File "/usr/lib/python3/dist-packages/requests/api.py", line 44, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 455, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 558, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 385, in send
raise SSLError(e)
requests.exceptions.SSLError: EOF occurred in violation of protocol (_ssl.c:598)

The last traceback suggests that the script is trying to Create_Notes_Backup, but encounters an error when communicating with the Highrise API.
The error message:
ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:598)
is consistent with a server that accepts your connection but then closes it immediately or prematurely. This might be a firewall issue.
If you have OpenSSL installed on this machine, you can try something like this to check the connection:
openssl s_client -crlf -connect USER.highrisehq.com:443
where USER is your Highrise user. You should normally get a long TLS handshake trace full of technical details, ending with --- and then it waits for your input.

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