Hi Mingliang Liu,

Thank you for your reply.

As I am completely new to setting up the Hadoop cluster I am not sure about the 
value of  fs.defaultFS. I have set the below one as the value, Could you please 
help me with the correct value.

<property>
        <name>fs.defaultFS</name>
        <value>hdfs://hdfs</value>
    </property>


As a additional information, we have two name nodes in our cluster.

Regards,
Kamaraj
InfoSight - SRE

From: Mingliang Liu<mailto:[email protected]>
Sent: Friday, August 21, 2020 11:14 PM
To: Muthupandiyan, Kamaraj<mailto:[email protected]>
Cc: [email protected]<mailto:[email protected]>
Subject: Re: Error while running "hdfs fs" commands

Seems that you have a wrong fs.defaultFS configuration in your core-site.xml

For the second command you should follow the user manual. The input is simply 
not valid. Try something like:

hadoop fs -ls 
hdfs://sym-hdfsnn1.lvs.nimblestorage.com/user<http://sym-hdfsnn1.lvs.nimblestorage.com/user>
or
hadoop fs -ls file:///tmp

On Fri, Aug 21, 2020 at 9:07 AM Muthupandiyan, Kamaraj 
<[email protected]<mailto:[email protected]>> wrote:
Hi Team,

Whenever I am executing the hdfs fs command and I am getting below error, 
please help me with this.

[hdfs@hdfsnn1 ~]$ hdfs dfs -ls /user
-ls: java.net.UnknownHostException: hdfs


[hdfs@sym-hdfsnn1 ~]$ hadoop fs -ls / file:///|hdfs:hdfsnn1:8020/
-bash: 
hdfs:sym-hdfsnn1.lvs.nimblestorage.com:8020/<http://sym-hdfsnn1.lvs.nimblestorage.com:8020/>:
 No such file or directory
-ls: java.net.UnknownHostException: hdfs
Usage: hadoop fs [generic options]
        [-appendToFile <localsrc> ... <dst>]
        [-cat [-ignoreCrc] <src> ...]
        [-checksum <src> ...]
        [-chgrp [-R] GROUP PATH...]
        [-chmod [-R] <MODE[,MODE]... | OCTALMODE> PATH...]
        [-chown [-R] [OWNER][:[GROUP]] PATH...]
        [-copyFromLocal [-f] [-p] [-l] [-d] <localsrc> ... <dst>]
        [-copyToLocal [-f] [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
        [-count [-q] [-h] [-v] [-t [<storage type>]] [-u] [-x] <path> ...]
        [-cp [-f] [-p | -p[topax]] [-d] <src> ... <dst>]
        [-createSnapshot <snapshotDir> [<snapshotName>]]
        [-deleteSnapshot <snapshotDir> <snapshotName>]
        [-df [-h] [<path> ...]]
        [-du [-s] [-h] [-x] <path> ...]
        [-expunge]
        [-find <path> ... <expression> ...]
        [-get [-f] [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
        [-getfacl [-R] <path>]
        [-getfattr [-R] {-n name | -d} [-e en] <path>]
        [-getmerge [-nl] [-skip-empty-file] <src> <localdst>]
        [-help [cmd ...]]
        [-ls [-C] [-d] [-h] [-q] [-R] [-t] [-S] [-r] [-u] [<path> ...]]
        [-mkdir [-p] <path> ...]
        [-moveFromLocal <localsrc> ... <dst>]



Regards,
Kamaraj
InfoSight - SRE



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