Hi @Sen Ke, Hope you are trying to do some WEBHDFS operations. This is common for WEBHDFS. Ex; If you want to upload a file using WEBHDFS , you have to make 2 curl calls. The response code of 1st curl call will be 307 redirect. The second call should be made to the Location Header obtained from the 1st curl call. Sample Curl Call to Create and Write to a File Step 1: Submit a HTTP PUT request without automatically following redirects and without sending the file data. curl -i -X PUT "http://<HOST>:<PORT>/webhdfs/v1/<PATH>?op=CREATE
[&overwrite=<true|false>][&blocksize=<LONG>][&replication=<SHORT>]
[&permission=<OCTAL>][&buffersize=<INT>]"
The request is redirected to a datanode where the file data is to be written: HTTP/1.1 307 TEMPORARY_REDIRECT
Location: http://<DATANODE>:<PORT>/webhdfs/v1/<PATH>?op=CREATE.
Content-Length: 0
Step 2: Submit another HTTP PUT request using the URL in the Location header with the file data to be written. curl -i -X PUT -T <LOCAL_FILE> "http://<DATANODE>:<PORT>/webhdfs/v1/<PATH>?op=CREATE..."
The client receives a 201 Created response with zero content length and the WebHDFS URI of the file in the Location header: HTTP/1.1 201 Created
Location: webhdfs://<HOST>:<PORT>/<PATH>
Content-Length: 0
The above URL is for normal WEBHDFS. To access it through Knox, you can use the knox url instead of HDFS. You can read more about WEBHDFS here and Knox WEBHDFS here Thanks, Aditya
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