ElasticSearch启动报错：plugin-descriptor.properties: Not a directory

centos环境下，ElasticSearch在IK分词器上传到plugins里解压后启动报错：

[WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [node-1] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: org.elasticsearch.bootstrap.BootstrapException: java.nio.file.FileSystemException: /usr/local/elasticsearch/elasticsearch-6.0.0/plugins/elasticsearch-analysis-ik-6.0.0.zip/plugin-descriptor.properties: Not a directory

原因:
分词器的压缩包上传解压后，没有把压缩包删除，删了就好了。