ERROR: Cannot find configuration directory "/xxxx/xxxx/xxxxx/hadoop-x.x.x/conf"

新检出的hadoop，

yarn version:

Hadoop 3.0.0-SNAPSHOT
Subversion git://git.apache.org/hadoop-common.git -r 42a61a4fbc88303913c4681f0d40ffcc737e70b5
Compiled by shen on 2014-09-25T01:32Z
Compiled with protoc 2.5.0
From source with checksum df70c29255f93f685db734fead08e8b
This command was run using /home/shen/Downloads/hadoop-2.5.0/share/hadoop/common/hadoop-common-3.0.0-SNAPSHOT.jar

输入start-yarn.sh，显示说ERROR: Cannot find configuration directory "/xxxx/xxxx/xxxxx/hadoop-x.x.x/conf"，发现需要修改/etc/hadoop中的yarn-evn.sh文件，将

export YARN_CONF_DIR="${YARN_CONF_DIR:-$HADOOP_YARN_HOME/conf}"

修改成

export YARN_CONF_DIR="${YARN_CONF_DIR:-$HADOOP_YARN_HOME/etc/hadoop}"

注：需要将此配置同步到所有的节点上