hadoop@ubuntu:~/Desktop/myfiles/hadoop-2.8.5/sbin$ ./start-dfs.sh
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.apache.hadoop.security.authentication.util.KerberosUtil (file:/home/hadoop/Desktop/myfiles/hadoop-2.8.5/share/hadoop/common/lib/hadoop-auth-2.8.5.jar) to method sun.security.krb5.Config.getInstance()
WARNING: Please consider reporting this to the maintainers of org.apache.hadoop.security.authentication.util.KerberosUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Starting namenodes on [hadoop]
hadoop: starting namenode, logging to /home/hadoop/Desktop/myfiles/hadoop-2.8.5/logs/hadoop-hadoop-namenode-ubuntu.out
hadoop: starting datanode, logging to /home/hadoop/Desktop/myfiles/hadoop-2.8.5/logs/hadoop-hadoop-datanode-ubuntu.out
Starting secondary namenodes [0.0.0.0]
0.0.0.0: starting secondarynamenode, logging to /home/hadoop/Desktop/myfiles/hadoop-2.8.5/logs/hadoop-hadoop-secondarynamenode-ubuntu.out
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.apache.hadoop.security.authentication.util.KerberosUtil (file:/home/hadoop/Desktop/myfiles/hadoop-2.8.5/share/hadoop/common/lib/hadoop-auth-2.8.5.jar) to method sun.security.krb5.Config.getInstance()
WARNING: Please consider reporting this to the maintainers of org.apache.hadoop.security.authentication.util.KerberosUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
jps还是没有出现是咋回事儿呢