[iotspark@iotsparkmaster sbin]$ ./start-all.sh
hostname: Host name lookup failure
starting org.apache.spark.deploy.master.Master, logging to /usr/iotspark/spark/spark-2.3.0-bin-hadoop2.7/logs/spark-iotspark-org.apache.spark.deploy.master.Master-1-iotsparkmaster.out
failed to launch: nice -n 0 /usr/iotspark/spark/spark-2.3.0-bin-hadoop2.7/bin/spark-class org.apache.spark.deploy.master.Master --host --port 7077 --webui-port 8080
at org.apache.spark.deploy.master.MasterArguments.<init>(MasterArguments.scala:30)
at org.apache.spark.deploy.master.Master$.main(Master.scala:1049)
at org.apache.spark.deploy.master.Master.main(Master.scala)
Caused by: java.net.UnknownHostException: iotsparkmaster: unknown error
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:907)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1302)
at java.net.InetAddress.getLocalHost(InetAddress.java:1479)
... 10 more
18/03/26 19:00:37 INFO ShutdownHookManager: Shutdown hook called
full log in /usr/iotspark/spark/spark-2.3.0-bin-hadoop2.7/logs/spark-iotspark-org.apache.spark.deploy.master.Master-1-iotsparkmaster.out
hostname: Host name lookup failure
localhost: starting org.apache.spark.deploy.worker.Worker, logging to /usr/iotspark/spark/spark-2.3.0-bin-hadoop2.7/logs/spark-iotspark-org.apache.spark.deploy.worker.Worker-1-iotsparkmaster.out
localhost: failed to launch: nice -n 0 /usr/iotspark/spark/spark-2.3.0-bin-hadoop2.7/bin/spark-class org.apache.spark.deploy.worker.Worker --webui-port 8081 spark://:7077
localhost: at org.apache.spark.deploy.worker.WorkerArguments.<init>(WorkerArguments.scala:31)
localhost: at org.apache.spark.deploy.worker.Worker$.main(Worker.scala:754)
localhost: at org.apache.spark.deploy.worker.Worker.main(Worker.scala)
localhost: Caused by: java.net.UnknownHostException: iotsparkmaster: unknown error
localhost: at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
localhost: at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:907)
localhost: at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1302)
localhost: at java.net.InetAddress.getLocalHost(InetAddress.java:1479)
localhost: ... 10 more
localhost: 18/03/26 19:00:39 INFO ShutdownHookManager: Shutdown hook called
localhost: full log in /usr/iotspark/spark/spark-2.3.0-bin-hadoop2.7/logs/spark-iotspark-org.apache.spark.deploy.worker.Worker-1-iotsparkmaster.out
解决方案如下：
修改/etc/hosts文件
127.0.0.1 主机名 localhost.localdomain localhost
或者再增加一条，如图所示：
image.png
image.png
可以直接使用hostname查看当前主机的用户名；
然后启动spark：
image.png
