Es-cluster install x-apck errors

[root@elastic-a1 elasticsearch]# /usr/share/elasticsearch/bin/elasticsearch-plugin install x-pack
-> Downloading x-pack from elastic
[=================================================] 100%??
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: plugin requires additional permissions @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

  • java.lang.RuntimePermission accessClassInPackage.com.sun.activation.registries
  • java.lang.RuntimePermission getClassLoader
  • java.lang.RuntimePermission setContextClassLoader
  • java.lang.RuntimePermission setFactory
  • java.security.SecurityPermission createPolicy.JavaPolicy
  • java.security.SecurityPermission getPolicy
  • java.security.SecurityPermission putProviderProperty.BC
  • java.security.SecurityPermission setPolicy
  • java.util.PropertyPermission * read,write
  • java.util.PropertyPermission sun.nio.ch.bugLevel write
  • javax.net.ssl.SSLPermission setHostnameVerifier
    See http://docs.oracle.com/javase/8/docs/technotes/guides/security/permissions.html
    for descriptions of what these permissions allow and the associated risks.

Continue with installation? [y/N]y
-> Installed x-pack

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