Kafka：ZK+Kafka+Spark Streaming集群环境搭建（四）针对hadoop2.9.0启动执行start-all.sh出现异常：failed to launch: nice -n 0 /bin/spark-class org.apache.spark.deploy.worker.Worker

启动问题：

执行start-all.sh出现以下异常信息：

failed to launch: nice -n 0 /bin/spark-class org.apache.spark.deploy.worker.Worker --webui-port 8081 spark://master:7077

解决方案：

Just added export JAVA_HOME=/usr/java/default in /root/.bashrc

su root
vi /root/.bashrc
export JAVA_HOME=/opt/jdk1.8.0_171

之后尝试重新启动hadoop。

参考《https://blog.csdn.net/Abandon_Sun/article/details/76686398》
《https://stackoverflow.com/questions/33955635/why-does-start-all-sh-from-root-cause-failed-to-launch-org-apache-spark-deploy》