Created 04-18-2021 11:50 PM
I authenticated with hadoop-admin user.
hdfs dfsadmin -fetchImage ./output
command works well.
However, when I try to do this with curl command,
curl https://{namenode_address}:9470/imagetransfer?getimage=1&txid=latest
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
<title>Error 401 Authentication required</title>
</head>
<body><h2>HTTP ERROR 401</h2>
<p>Problem accessing /imagetransfer. Reason:
<pre> Authentication required</pre></p>
</body>
</html>
Which authentication is needed additionally?
Created 04-20-2021 10:11 PM
Hi @sipocootap2 ,
AFAIK "/getimage" is deprecated in CDH and we suggest this not to be used. Instead you can use the command "hdfs dfsadmin -fetchImage <dir>" to download & save the latest fsimage.
Based on research, in earlier versions of CDH, the getImage method was available after which a need was realized to provide a proper command/utility to download the FSimage and as a result of which "hdfs dfsadmin -fetchImage" was born. Once that was put in place, the getImage was removed.
Does that answers your questions ? If yes, feel free to mark this post as "accept as solution"
Regards,
Created 06-03-2021 01:10 AM
Hi @kingpin.
Thanks for the reply.
Is there an official document that "/getimage" is deprecated? Cause I couldn't find it.
When I run "hdfs dfsadmin -fetchImage" command, it also calls the same curl command.
I could get fsimage with hdfs command, but I want to figure out the reason why curl fails.