Andrew Wang created HDFS-12197:
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Summary: Do the HDFS dist stitching in hadoop-hdfs-project
Key: HDFS-12197
URL: https://issues.apache.org/jira/browse/HDFS-12197
Project: Hadoop HDFS
Issue Type: Improvement
Components: build
Affects Versions: 3.0.0-alpha4
Reporter: Andrew Wang
Problem reported by [~lars_francke] on HDFS-11596. We can no longer easily
start a namenode and datanode from the source directory without doing a full
build per the wiki instructions:
https://wiki.apache.org/hadoop/HowToSetupYourDevelopmentEnvironment
This is because we don't have a top-level dist for HDFS. $HADOOP_YARN_HOME for
instance can be set to {{hadoop-yarn-project/target}}, but $HADOOP_HDFS_HOME
goes into the submodule: {{hadoop-hdfs-project/hadoop-hdfs/target}}. This means
it's missing the files from the sibling hadoop-hdfs-client module (which is
required by the namenode), but also other siblings like nfs and httpfs.
So, I think the right fix is doing the dist stitching at the
{{hadoop-hdfs-project}} level where we can aggregate all the child modules, and
pointing $HADOOP_HDFS_HOME at this directory.
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