Cloudera 5.12版本中$HADOOP_HOME环境变量取值咨询

Hey there! Let me clarify this for you regarding Cloudera 5.12's $HADOOP_HOME setting:

For Cloudera 5.12 (which uses the standard CDH 5.12 parcel distribution via Cloudera Manager, the most common deployment approach), the default value of $HADOOP_HOME is:

/opt/cloudera/parcels/CDH/lib/hadoop

A few important details to note:

• This path relies on the default parcel installation location—Cloudera typically places parcels in /opt/cloudera/parcels/ by default. The CDH directory here is a symlink pointing to the active CDH 5.12 parcel (e.g., CDH-5.12.0-1.cdh5.12.0.p0.29).
• If you're operating as a Hadoop service user like hdfs or yarn, this environment variable should already be configured in their shell context. You can confirm it by running:

  echo $HADOOP_HOME
  

• For manual, non-Cloudera Manager installations, the path might differ (you would have defined it during setup), but the above is the standard value for Cloudera-managed 5.12 clusters.

内容的提问来源于stack exchange，提问作者PraveenK