[GitHub] [flink] 1u0 commented on a change in pull request #9166: [FLINK-12901][docs] Update Hadoop build instructions

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1u0 commented on a change in pull request #9166: [FLINK-12901][docs] Update Hadoop build instructions
URL: https://github.com/apache/flink/pull/9166#discussion_r305760200
 
 

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 File path: docs/flinkDev/building.md
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 @@ -97,35 +97,49 @@ mvn clean install
 
 ## Hadoop Versions
 
-{% info %} Most users do not need to do this manually. The [download page]({{ site.download_url }}) contains binary packages for common Hadoop versions.
+Flink has optional dependencies to HDFS and YARN which are both dependencies from [Apache Hadoop](http://hadoop.apache.org). There exist many different versions of Hadoop (from both the upstream project and the different Hadoop distributions). If you are using a wrong combination of versions, exceptions can occur.
 
-Flink has dependencies to HDFS and YARN which are both dependencies from [Apache Hadoop](http://hadoop.apache.org). There exist many different versions of Hadoop (from both the upstream project and the different Hadoop distributions). If you are using a wrong combination of versions, exceptions can occur.
+Flink can be built against any Hadoop version >= 2.4.0, but depending on the version it may be a 1 or 2 step process.
 
-Hadoop is only supported from version 2.4.0 upwards.
-You can also specify a specific Hadoop version to build against:
+### Pre-bundled versions
+
+If you want to build against Hadoop 2.4.1, 2.6.5, 2.7.5 or 2.8.3, then it is sufficient to run:
 
 Review comment:
   I suppose that the command example is specific for `2.6.5`. Maybe update the sentence with:
   
   > then it is sufficient to run (e.g. for Hadoop version `2.6.5`):
   
   ?

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