请教：ik安装到装有x-pack的es上

由于es已安装x-pack，访问需要身份验证，此情况下，安装ik插件后，插件启动不起来，请问该如何处理，启动日志如下：
[2017-08-14T10:07:38,336][INFO ][o.e.n.Node ] [node-2] started
[2017-08-14T10:07:38,418][INFO ][o.w.a.d.Monitor ] try load config from /home/program/elasticsearch-5.4.0/config/analysis-ik/IKAnalyzer.cfg.xml
[2017-08-14T10:07:38,419][INFO ][o.w.a.d.Monitor ] try load config from /home/program/elasticsearch-5.4.0/plugins/ik/config/IKAnalyzer.cfg.xml
[2017-08-14T10:07:38,558][INFO ][o.w.a.d.Monitor ] [Dict Loading] custom/mydict.dic
[2017-08-14T10:07:38,558][INFO ][o.w.a.d.Monitor ] [Dict Loading] custom/single_word_low_freq.dic
[2017-08-14T10:07:38,560][INFO ][o.w.a.d.Monitor ] [Dict Loading] custom/ext_stopword.dic
[2017-08-14T10:07:42,781][WARN ][o.e.x.s.a.AuthenticationService] [node-2] An unexpected error occurred while attempting to authenticate [elastic] against realm [reserved]
org.elasticsearch.ElasticsearchSecurityException: failed to authenticate user [elastic]
at org.elasticsearch.xpack.security.support.Exceptions.authenticationError(Exceptions.java:39) ~[?:?]
at org.elasticsearch.xpack.security.authc.esnative.ReservedRealm.lambda$null$2(ReservedRealm.java:106) ~[?:?]
at org.elasticsearch.xpack.security.authc.esnative.ReservedRealm.lambda$doAuthenticate$3(ReservedRealm.java:110) ~[?:?]
at org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:59) ~[elasticsearch-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.esnative.ReservedRealm.getUserInfo(ReservedRealm.java:214) ~[x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.esnative.ReservedRealm.doAuthenticate(ReservedRealm.java:89) ~[x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.doAuthenticateAndCache(CachingUsernamePasswordRealm.java:141) ~[x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.authenticateWithCache(CachingUsernamePasswordRealm.java:107) ~[x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.authenticate(CachingUsernamePasswordRealm.java:92) ~[x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$consumeToken$10(AuthenticationService.java:264) ~[x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.common.IteratingActionListener.run(IteratingActionListener.java:93) ~[x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.consumeToken(AuthenticationService.java:288) ~[x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$extractToken$6(AuthenticationService.java:239) ~[x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.extractToken(AuthenticationService.java:247) ~[x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$authenticateAsync$0(AuthenticationService.java:194) ~[x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$lookForExistingAuthentication$2(AuthenticationService.java:212) ~[x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lookForExistingAuthentication(AuthenticationService.java:224) [x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.authenticateAsync(AuthenticationService.java:190) [x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.access$000(AuthenticationService.java:147) [x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.authc.AuthenticationService.authenticate(AuthenticationService.java:118) [x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.transport.ServerTransportFilter$NodeProfile.inbound(ServerTransportFilter.java:144) [x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.xpack.security.transport.SecurityServerTransportInterceptor$ProfileSecuredRequestHandler.messageReceived(SecurityServerTransportInterceptor.java:301) [x-pack-5.4.0.jar:5.4.0]
at org.elasticsearch.transport.RequestHandlerRegistry.processMessageReceived(RequestHandlerRegistry.java:69) [elasticsearch-5.4.0.jar:5.4.0]
at org.elasticsearch.transport.TcpTransport$RequestHandler.doRun(TcpTransport.java:1519) [elasticsearch-5.4.0.jar:5.4.0]
at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-5.4.0.jar:5.4.0]
at org.elasticsearch.common.util.concurrent.EsExecutors$1.execute(EsExecutors.java:110) [elasticsearch-5.4.0.jar:5.4.0]
at org.elasticsearch.transport.TcpTransport.handleRequest(TcpTransport.java:1476) [elasticsearch-5.4.0.jar:5.4.0]
at org.elasticsearch.transport.TcpTransport.messageReceived(TcpTransport.java:1360) [elasticsearch-5.4.0.jar:5.4.0]
at org.elasticsearch.transport.netty4.Netty4MessageChannelHandler.channelRead(Netty4MessageChannelHandler.java:74) [transport-netty4-5.4.0.jar:5.4.0]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293) [netty-codec-4.1.9.Final.jar:4.1.9.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:280) [netty-codec-4.1.9.Final.jar:4.1.9.Final]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:396) [netty-codec-4.1.9.Final.jar:4.1.9.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:248) [netty-codec-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:134) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:624) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:524) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:478) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:438) [netty-transport-4.1.9.Final.jar:4.1.9.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [netty-common-4.1.9.Final.jar:4.1.9.Final]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_112]