elasticsearch起動時にエラーになった（kibanaで画面が真っ白）→文字コードが原因だった elasticsearch

■elasticsearch起動時にエラーになった（kibanaで画面が真っ白）
・原因　config/elasticsearch.yml　ファイルを修正した際に sjis形式で保存したみたい。
文字コードutf8に修正して再起動したら無事起動できた

・以下のエラーが発生
C:¥¥elasticsearch-6.1.1¥bin>elasticsearch.bat
Exception in thread main 2018-01-31 19:38:16 281 main ERROR No log4j2 configuration file found. Using default configuration: logging only errors to the console. Set system property log4j2.debug to show Log4j2 internal initialization logging.
SettingsException[Failed to load settings from [elasticsearch.yml]]; nested: YAMLException[java.io.CharConversionException: Invalid UTF-8 start byte 0x90 (at char #1802 byte #1023)
at [Source: sun.nio.ch.ChannelInputStream@40a4337a; line: 1 column: 1]]; nested: YAMLException[java.io.CharConversionException: Invalid UTF-8 start byte 0x90 (at char #1802 byte #1023)]; nested: CharConversionException[Invalid UTF-8 start byte 0x90 (at char #1802 byte #1023)];
at org.elasticsearch.common.settings.Settings$Builder.loadFromStream(Settings.java:1186)
at org.elasticsearch.common.settings.Settings$Builder.loadFromPath(Settings.java:1161)
at org.elasticsearch.node.InternalSettingsPreparer.prepareEnvironment(InternalSettingsPreparer.java:99)
at org.elasticsearch.cli.EnvironmentAwareCommand.createEnv(EnvironmentAwareCommand.java:95)
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:92)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:85)
Caused by: com.fasterxml.jackson.dataformat.yaml.snakeyaml.error.YAMLException: java.io.CharConversionException: Invalid UTF-8 start byte 0x90 (at char #1802 byte #1023)
at [Source: sun.nio.ch.ChannelInputStream@40a4337a; line: 1 column: 1]
at com.fasterxml.jackson.dataformat.yaml.snakeyaml.error.YAMLException.from(YAMLException.java:25)
at com.fasterxml.jackson.dataformat.yaml.YAMLParser.nextToken(YAMLParser.java:346)
at org.elasticsearch.common.xcontent.json.JsonXContentParser.nextToken(JsonXContentParser.java:52)
at org.elasticsearch.common.settings.Settings$Builder.loadFromStream(Settings.java:1178)
... 8 more
Caused by: org.yaml.snakeyaml.error.YAMLException: java.io.CharConversionException: Invalid UTF-8 start byte 0x90 (at char #1802 byte #1023)
at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:200)
at org.yaml.snakeyaml.reader.StreamReader.peek(StreamReader.java:146)
at org.yaml.snakeyaml.scanner.ScannerImpl.scanToNextToken(ScannerImpl.java:1199)
at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:289)
at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:226)
at org.yaml.snakeyaml.parser.ParserImpl$ParseImplicitDocumentStart.produce(ParserImpl.java:194)
at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:157)
at org.yaml.snakeyaml.parser.ParserImpl.getEvent(ParserImpl.java:167)
at com.fasterxml.jackson.dataformat.yaml.YAMLParser.nextToken(YAMLParser.java:340)
... 10 more
Caused by: java.io.CharConversionException: Invalid UTF-8 start byte 0x90 (at char #1802 byte #1023)
at com.fasterxml.jackson.dataformat.yaml.UTF8Reader.reportInvalidInitial(UTF8Reader.java:384)
at com.fasterxml.jackson.dataformat.yaml.UTF8Reader.read(UTF8Reader.java:237)
at com.fasterxml.jackson.dataformat.yaml.UTF8Reader.read(UTF8Reader.java:148)
at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:184)
... 18 more