In a Windows environment, I'm trying to load a .csv file with statement:
LOAD CSV WITH HEADERS FROM "file:///E:/Neo4j/customers.csv" AS row
It seems not to work properly and returns:
Couldn't load the external resource at:
file:/E:/Neo4j/Customers.csv
Neo.TransientError.Statement.ExternalResourceFailure
What am I doing wrong? thanks in advance
I was getting this error on Community Edition 3.0.1 on Mac OS X 10.10
It appears that the LOAD CSV file:/// looks for files in a predefined directory. One would think that in the argument that one would give the Cypher statement the full path but that is not the case.
The file:/// - for my situation" meant that neo4j would append the given argument you gave to one that was already predefined and then go look for that combined path
The file:/// pre-defined directory directory did not exist entirely
/Users/User/Documents/Neo4j/default.graphdb/import, in my computers directory structure I was missing the "/import" folder, which was not created at install
To fix on my system, I created an "import" directory, put the file to be read in that directory. I executed the Cypher load statement I ONLY put the name of the file to be read in the file argument i.e.
LOAD CSV file:///data.csv
this worked for me.
It appears to be a security configuration. Here's the original answer I found: https://stackoverflow.com/a/37444571/327004
You can add the following setting in conf/neo4j.conf in order to bypass this :
dbms.security.allow_csv_import_from_file_urls=true
Or change the import directory dbms.directories.import=import
You can find the answer in the file
"C:\Users\Jack\AppData\Roaming\Neo4j Community Edition\neo4j.conf"
(above "dbms.directories.import=import")
For version neo4j-community_windows-x64_3_1_1 you have to comment out this line or you have to create the folder \import (which isn´t created through the installation) and add your file into the folder.
There it´s written that due to security reasons they only allow file load from the \Documents\Neo4j\default.graphdb\import folder
After commenting out on # dbms.directories.import=import , you can execute e.g. from
LOAD CSV FROM "file:///C:/Users/Jack/Documents/products.csv" AS row
In neo4j.conf I didn´t have to add/set
dbms.security.allow_csv_import_from_file_urls=true
On (Arch) Linux + neo4j-community-3.4.0-alpha09, edit $NEO4J_HOME/conf
/neo4j.conf:
uncomment or add: dbms.security.allow_csv_import_from_file_urls=true
comment: #dbms.directories.import=import
Restart neo4j (in terminal: neo4j restart), and reload the Neo4j Browser (http://localhost:7474/browser/) if you are using a web browser as your Neo4j interface/GUI.
Then, you should be able to load a csv from outside your $NEO4J_HOME/... directory
E.g.,
LOAD CSV WITH HEADERS FROM "file:///mnt/Vancouver/Programming/data/metabolism/practice/a.csv" AS ...
where my $NEO4J_HOME/ is /mnt/Vancouver/apps/neo4j/neo4j-community-3.4.0-alpha09/
LOAD CSV WITH HEADERS FROM "file:/mnt/Vancouver/Programming/data/metabolism/practice/a.csv" AS ...
also works, but not
LOAD CSV WITH HEADERS FROM "file://mnt/Vancouver/Programming/data/metabolism/practice/a.csv" AS...
or
LOAD CSV WITH HEADERS FROM "/mnt/Vancouver/Programming/data/metabolism/practice/a.csv" AS...
i.e. use ...file:/... or ...file:///...
It's probably an URL issue, try file:c:/path/to/data.csv
See my blog posts:
http://jexp.de/blog/2014/10/load-cvs-with-success/
http://jexp.de/blog/2014/06/load-csv-into-neo4j-quickly-and-successfully/
For the ubuntu system, I placed the file in /usr/lib/neo4j which helped me solved the issue. On every other location, i tried giving full permissions(777) but the problem remains the same. After going through another stackoverflow post, i realized that the file should be kept in neo4j directory.
In the Neo4j desktop select the database you are using, go to the setting and there you will find the solution... just comment the "dbms.directories.import=import" line
# This setting constrains all LOAD CSV import files to be under the import directory. Remove or comment it out to
# allow files to be loaded from anywhere in the filesystem; this introduces possible security problems. See the
# LOAD CSV section of the manual for details.
dbms.directories.import=import ### COMMENT THIS LINE
For macOS Mojave v 10.14.5
Actually, I had to uncomment dbms.directories.import=import from ~/Library/Application Support/Neo4j Desktop/Application/neo4jDatabases/database-e2dd2a9c-d450-4639-861b-1e7e42b56b31/installation-3.5.5/conf/neo4j.conf and restart the service. Then it worked. All files has to be placed in import directory.
Run command LOAD CSV WITH HEADERS FROM 'FILE:/<yourCSV>.csv' as l return l
I am using the Neo4j Desktop and as others have said, the default graph database has a predefined import location. You can find the location by using the UI. If you put the CSV into the import directory, then you can use the relative path directly from you load csv command
Neo4j version is 3.1.1, OS is win10.
For me, LOAD CSV would read from Neo4j_Database_Location/testDB/import/artists.csv.
At first, I put csv file on the path F:\code\java\helloworld\artists.csv, and my cypher sentence is
LOAD CSV FROM 'file:///F:\\code\\java\\helloworld\\artists.csv' AS line
CREATE(:Artist {name:line[1],year:toInt(line[2])})
Then I get the error message returned as follows:
Couldn't load the external resource at: file:/D:/Neo4j/db/testDB/import/code/java/helloworld/artists.csv
It means neo4j itself concat the file path.
"D:/Neo4j/db/testDB/import/" is the Neo4j database location, and the "code/java/helloworld/artists.csv" is the csv file location.
For example, I install Neo4j on the path D:\Neo4j\Neo4j CE 3.1.1, and database loaction is D:\Neo4j\db. I put the CSV file on the path D:\Neo4j\db\testDB\import\artist.csv. If you don't have the file folder "import" on the path, you should creat it by yourself and put your file in the folder "import".
Then, put your csv file in the path, and input cyper sentence:
LOAD CSV from 'file:///artist.csv' as LINE
CREATE(:Artist {name:line[1],year:toInt(line[2])})
In a word, once you put the CSV file in the right path, the problem can be solved.
Related explaination in the LOAD CSV developer-manal
If dbms.directories.import is set to the default value import, using the above URLs in LOAD CSV would read from /import/myfile.csv and import/myproject/myfile.csv respectively.
If it is set to /data/csv, using the above URLs in LOAD CSV would read from /data/csv/myfile.csv and /data/csv/myproject/myfile.csv respectively.
Set the Property "dbms.directories.import=import"
Create folder 'import' explicitly at "/Users/User/Documents/Neo4j/default.graphdb/" because pre-defined directory did not exist entirely
place the csv data set here in the import folder
then run the code like - LOAD CSV FROM "file:///C:/customers.csv" AS row
In addition after you run the line, you can analyze what is going wrong in the code section to get a better understanding
you put your dataset into the import directory in neo4j-community path.
Then re-run your command.
Add your csv file in the import folder of neo4j installation guide to do this.
open neo4j and start graph of ur project
then in open folders tab open import folders
Copy ur csv file in this folder
Copy that part in ur load syntax as file:///C:/neo4j_module_datasets/test.csv since ur neo4j in running
in C drive
Snapshot for your reference
Use the following syntax:
LOAD CSV WITH HEADERS FROM "file:///my_collection.csv" AS row CREATE (n:myCollection) SET n = row
If you are running a docker then, follow these commands before running above query:
docker run \
-p=7474:7474 \
-p=7687:7687 \
-v=$HOME/neo4j/data:/data \
-v=$HOME/neo4j/logs:/logs \
-v=$HOME/local_import_dir:/var/lib/neo4j/import \
neo4j:3.0
Then,
sudo cp my_collection.csv /home/bajju/local_import_dir/
One of the following should solve the LOAD CSV errors (assuming you have dbms.security.allow_csv_import_from_file_urls=true)
If using Linux check for the permissions for the file. Change it using chmod 777 file_name.csv
Check if the file format/format for the contents within the file is correct.
The easiest way (be ware of security) is to serve you directory over http and use the http import
in the command line go the folder where csv files are lcoated
run the following depending on your python env.
Python 2
$ python -m SimpleHTTPServer 8000
Python 3
$ python3 -m http.server 8000
- Now you can load your files from your local host
LOAD CSV FROM 'http://localhost:8000/mycsvfile.csv' AS row
return row
- you can actually expose files on one host and load them where your DB is running by exposing the folder and replacing localhost with your IP
Related
I searched many threads in different forums but unfortunately did not find a solution to my problem.
I would like to save my Databricks Notebook after executing it as an HTML file with the output of cells.
I know there is an option to save the file manually using File >> Export >> HTML, but is there an option to use some method in the last cell that will do this without manually clicking?
I mean something similar to:
!jupyter nbconvert your_notebook_name.ipynb --to html
Thanks for any tips!
If you run similar code in the notebook, will be then exported to the local disk of the driver node not to your computer, as code is executed in the cloud.
One approach to get it as HTML to your local disk, is to use Export command of Workspace REST API or corresponding command of Databricks CLI
I use Beaker on Windows and start it up with gitbash with the following command:
./beaker.command.bat
If I want to read a .csv or excel file I have to place it in the same directory as the beaker.command.bat.
How can I just the .csv files directly from their original location where the .bkr notebook script and the files are located?
I figured it out, just use the full directory path instead pointing to the file.
I have graph.db folder from neo4j. It contains lot of neostore*.* files. How do i export a csv file from this ?
Note: I have this graph.db sent from my friend.
Download and install Neo4j if you haven't already
Move the graph.db directory that you have now into the data/ directory of the fresh Neo4j installation, replacing the existing graph.db directory in the fresh Neo4j instance. (Note: If you are using the desktop Neo4j application you can simply choose the location of your existing graph.db directory when starting Neo4j).
Start Neo4j server
To generate CSVs you have a few options:
Export from Neo4j Browser With Neo4j running, open your web browser and navigate to http://localhost:7474. Execute a Cypher query. Click on the "Download" icon and choose "Export CSV" to download a CSV representation of the data returned. See screenshot below.
neo4j-shell-tools Use neo4j-shell-tools to export results of a Cypher query. Use -o file.csv to specify output should be written to CSV file.
See this blog post for more info.
I'm just starting out with Apache Cassandra. I have some csql files that define my data. I have got Cassandra installed on my machine and I did start it as per Apache Cassandra Wiki. Nothing suspicious!
I'm using the CLI to create the namespaces and the tables for which I have some cql files in a specific directory like:
create_tables.cql
load_tables.cql
I was able to successfully do the create_tables.cql, but when I tried to urn the load_tables.cql, I always end up seeing:
/Users/myUser/data/load-test-data.cql:7:Can't open 'test_data.csv' for reading: [Errno 2] No such file or directory: 'test_data.csv'
The load_tables.cql refers to another csv file that contains the test data that I want to populate my database with!
COPY test_table (id, name) FROM 'test_data.csv';
I tried doing al sort of permissions to the data folder where the cql files are, but still I keep getting this message. Any hints as to what I could do to get this solved?
Ok I got this one sorted! It has got to do with the absolute and relative paths. I ended up using an absolute path to where my CSV is located! This solved the issue!
I recently installed hadoop on my local ubuntu. I have started data-node by invoking bin/start-all.sh script. However when I try to run the word count program
bin/hadoop jar hadoop-examples-1.2.1.jar wordcount /home/USER/Desktop/books /home/USER/Desktop/books-output
I always get a connect exception. The folder 'books' is on my deskop(local filesystem). Any suggestions on how to overcome this?
I have followed every steps in this tutorial. I am not sure how to get rid of that error. All help will be appreciated.
copy your books file into your hdfs
and for the input path argument use hdfs path of your copied book file.
for more detail go through below link.
http://cs.smith.edu/dftwiki/index.php/Hadoop_Tutorial_1_--_Running_WordCount#Basic_Hadoop_Admin_Commands
There is a bit of confusion here, when you run the hadoop ... command then the default filesystem which it uses is the hadoop distributed filesystem hence the files must be located on the hdfs for hadoop to access it.
To copy files from the local filesystem to the hadoop filesystem you have to use the following command
hdfs dfs -copyFromLocal /path/in/local/file/system /destination/on/hdfs
One more thing if you want to run the program from your IDE directly then sometimes you get this issue which can be solved by adding the
core-site.xml and hdfs-site.xml files in the conf variable something like
conf.addResource(new Path("/usr/local/hadoop/etc/hadoop/core-site.xml"));
conf.addResource(new Path("/usr/local/hadoop/etc/hadoop/hdfs-site.xml"));
change the path above to the hdfs-site.xml and core-site.xml to your local path.
So the above arguments can also be provided from the command line by adding them to the classPath with -cp tag.