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Editorial Team
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Asked: 2026-06-11T02:42:39+00:00

I use the following hadoop command to create a directory hdfs dfs -mkdir /tmp/testing/morehere1

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I use the following hadoop command to create a directory

 hdfs dfs -mkdir /tmp/testing/morehere1

I get the following message:

 log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).

log4j:WARN Please initialize the log4j system properly.

Not understanding the error, I run the command again, which returns this message:

 log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).
 log4j:WARN Please initialize the log4j system properly.
 mkdir: `/tmp/testing/morehere2': File exists

then when I try to go to the directory just created, it’s not there.

cd /tmp/testing/morehere2
 -bash: cd: /tmp/testing/morehere2: No such file or directory

Any ideas what I am doing wrong?

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1 Answer

  1. Editorial Team
     hdfs dfs -mkdir /tmp/testing/morehere1

    This command created a directory in the hdfs . Dont worry about the log4j warning . The command created the directory successfully . That is why you got the error mkdir: /tmp/testing/morehere2': File exists the second time you tried the command .

    The following command will not work , since the directory is not created in your local filesystem , but in hdfs .

    cd /tmp/testing/morehere2

    Use the command below to check the created directory in hdfs : 

    hdfs dfs -ls /tmp/testing

    You should be able to see the new directory there .

    About the log4j warning : You can ignore that as it will not cause your hadoop commands to fail . But if you want to correct it , you can add a File appender to log4j.properties .

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