org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: Could not load plugin descriptor for plugin directory [ik]
Caused by: java.nio.file.NoSuchFileException: /Volumes/software/elasticsearch-6.4.3/plugins/ik/plugin-descriptor.properties

[2022-02-06T16:27:00,066][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: Could not load plugin descriptor for plugin directory [ik]
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:140) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:127) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.4.3.jar:6.4.3]
	at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86) ~[elasticsearch-6.4.3.jar:6.4.3]
Caused by: java.lang.IllegalStateException: Could not load plugin descriptor for plugin directory [ik]
	at org.elasticsearch.plugins.PluginsService.readPluginBundle(PluginsService.java:394) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.plugins.PluginsService.findBundles(PluginsService.java:379) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.plugins.PluginsService.getPluginBundles(PluginsService.java:372) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.plugins.PluginsService.<init>(PluginsService.java:144) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.node.Node.<init>(Node.java:315) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.node.Node.<init>(Node.java:256) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:213) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:213) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:326) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.4.3.jar:6.4.3]
	... 6 more
Caused by: java.nio.file.NoSuchFileException: /Volumes/software/elasticsearch-6.4.3/plugins/ik/plugin-descriptor.properties
	at sun.nio.fs.UnixException.translateToIOException(UnixException.java:86) ~[?:?]
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102) ~[?:?]
	at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107) ~[?:?]
	at sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:214) ~[?:?]
	at java.nio.file.Files.newByteChannel(Files.java:361) ~[?:1.8.0_281]
	at java.nio.file.Files.newByteChannel(Files.java:407) ~[?:1.8.0_281]
	at java.nio.file.spi.FileSystemProvider.newInputStream(FileSystemProvider.java:384) ~[?:1.8.0_281]
	at java.nio.file.Files.newInputStream(Files.java:152) ~[?:1.8.0_281]
	at org.elasticsearch.plugins.PluginInfo.readFromProperties(PluginInfo.java:162) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.plugins.PluginsService.readPluginBundle(PluginsService.java:391) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.plugins.PluginsService.findBundles(PluginsService.java:379) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.plugins.PluginsService.getPluginBundles(PluginsService.java:372) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.plugins.PluginsService.<init>(PluginsService.java:144) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.node.Node.<init>(Node.java:315) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.node.Node.<init>(Node.java:256) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:213) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:213) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:326) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.4.3.jar:6.4.3]
	... 6 more

报错如上，原因
ik文件存放在了plugins文件下，导致找不到plugin-descriptor.properties配置文件，故将elastic文件移出即可