elasticsearch의 몇 가지 오류 원인과 해결 방법

키 라이브러리 초기화 문제

Exception in thread "main" org.elasticsearch.bootstrap.BootstrapException: java.nio.file.AccessDeniedException: /usr/local/elasticsearch/elasticsearch-6.6.0/config/elasticsearch.keystore
Likely root cause: java.nio.file.AccessDeniedException: /usr/local/elasticsearch/elasticsearch-7.1.0/config/elasticsearch.keystore
	at sun.nio.fs.UnixException.translateToIOException(UnixException.java:84)
	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)
	at java.nio.file.Files.newByteChannel(Files.java:407)
	at org.apache.lucene.store.SimpleFSDirectory.openInput(SimpleFSDirectory.java:77)
	at org.elasticsearch.common.settings.KeyStoreWrapper.load(KeyStoreWrapper.java:206)
	at org.elasticsearch.bootstrap.Bootstrap.loadSecureSettings(Bootstrap.java:224)
	at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:289)
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159)
	at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:150)
	at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)
	at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124)
	at org.elasticsearch.cli.Command.main(Command.java:90)
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:115)
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92)
Refer to the log for complete error details.

bin/elasticsearch-keystore create

최대 메모리 문제

ERROR: bootstrap checks failed
max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

vi /etc/sysctl.conf 

vm.max_map_count=655360

sysctl -p