hadoop启动时报错process information unavailable

• 启动hadoop，jps查看报错

[root@slave1 home]# jps
7798 -- process information unavailable
7081 -- process information unavailable

• 查看进程是否存在

[root@slave1 home]# ps -ef|grep 7798
root       9312   7475  0 23:19 pts/2    00:00:00 grep --color=auto 7798

• 尝试是否可以杀死该进程

[root@slave1 home]# kill -9 7798
-bash: kill: (7798) - 没有那个进程

• 进入/tmp，进入hsperfdata_root

[root@slave1 home]# cd /tmp
[root@slave1 tmp]# ll
总用量 48
drwxr-xr-x.  2 root root     6 12月 14 19:24 06ae89a7-92e0-48eb-8c93-8cd65ccb7f21_resources
drwxrwxrwx.  3 root root    17 12月 13 18:17 hadoop-root
-rwxrwxrwx.  1 root root     5 12月 18 23:13 hadoop-root-datanode.pid
-rwxrwxrwx.  1 root root     5 12月 18 23:13 hadoop-root-namenode.pid
drwxr-xr-x.  4 root root   123 12月 14 19:35 hadoop-unjar1564047809770746623
drwxrwxrwx.  3 root root    19 12月 13 21:50 hbase-root
-rwxrwxrwx.  1 root root     6 12月 13 21:49 hbase-root-master.pid
-rwxrwxrwx.  1 root root    27 12月 13 21:50 hbase-root-master.znode
-rwxrwxrwx.  1 root root     6 12月 13 21:49 hbase-root-regionserver.pid
-rwxrwxrwx.  1 root root    37 12月 13 21:50 hbase-root-regionserver.znode
drwxrwxrwx.  2 root root    30 12月 14 03:47 hsperfdata_root
[root@slave1 hsperfdata_root]# ls
7081  7798
[root@slave1 hsperfdata_root]# rm /tmp/hsperfdata_root/7081 
rm：是否删除普通文件 "/tmp/hsperfdata_root/7081"？y
[root@slave1 hsperfdata_root]# ls
7798
[root@slave1 hsperfdata_root]# rm /tmp/hsperfdata_root/7798 
rm：是否删除普通文件 "/tmp/hsperfdata_root/7798"？y