问题：在执行yarn集群或者客户端时，报以上错误，

Exception in thread "main" java.lang.Exception: When running with master 'yarn-client' either HADOOP_CONF_DIR or YARN_CONF_DIR must be set in the environment.

问题：在执行yarn集群或者客户端时，报以上错误，

[bdata@bdata4 bin]$ ./spark-sql --master yarn-client

Exception in thread "main" java.lang.Exception: When running with master 'yarn-client' either HADOOP_CONF_DIR or YARN_CONF_DIR must be set in the environment.

解决办法

根据提示，配置HADOOP_CONF_DIR or YARN_CONF_DIR的环境变量即可

export HADOOP_HOME=/u01/hadoop-2.6.1

export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop

PATH=PATH:PATH: HOME/.local/bin:HOME/bin:HOME/bin: SQOOP_HOME/bin:HIVEHOME/bin:HIVEHOME/bin: HADOOP_HOME/bin