ElasticSearch 5.6无法在Mac OS上启动

Question

用Brew安装后，我无法在Mac上启动ElasticSearch 5.6服务器。得到此错误：

$ /usr/local/opt/[email protected]/bin/elasticsearch
Exception in thread "main" org.elasticsearch.bootstrap.BootstrapException: org.apache.lucene.index.IndexFormatTooNewException: Format version is not supported (resource BufferedChecksumIndexInput(SimpleFSIndexInput(path="/usr/local/etc/elasticsearch/elasticsearch.keystore"))): 3 (needs to be between 1 and 2)
Likely root cause: org.apache.lucene.index.IndexFormatTooNewException: Format version is not supported (resource BufferedChecksumIndexInput(SimpleFSIndexInput(path="/usr/local/etc/elasticsearch/elasticsearch.keystore"))): 3 (needs to be between 1 and 2)
    at org.apache.lucene.codecs.CodecUtil.checkHeaderNoMagic(CodecUtil.java:216)
    at org.apache.lucene.codecs.CodecUtil.checkHeader(CodecUtil.java:198)
    at org.elasticsearch.common.settings.KeyStoreWrapper.load(KeyStoreWrapper.java:175)
    at org.elasticsearch.bootstrap.Bootstrap.loadSecureSettings(Bootstrap.java:246)
    at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:304)
    at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:132)
    at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:123)
    at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:70)
    at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:134)
    at org.elasticsearch.cli.Command.main(Command.java:90)
    at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91)
    at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84)
Refer to the log for complete error details.

由于它不是ElasticSearch的最新版本，我认为它安装了一些不兼容的软件包版本，但不确定是哪个软件包。

任何人都可以帮助它的工作吗？

Answer 1

我刚才有同样的问题，重新生成密钥库为我解决了问题。以下是我采取的步骤：

备份现有密钥库：

cd /usr/local/etc/elasticsearch/
mv elasticsearch.keystore elasticsearch.keystore.old

生成新的密钥库：

cd /usr/local/Cellar/[email protected]/5.6.15/libexec/bin/
elasticsearch-keystore create

Answer 2

服务器很可能正在尝试读取较新的索引（org.apache.lucene.index.IndexFormatTooNewException）。

最有可能的唯一方法是完全摆脱它：

sudo rm -rf  /usr/local/var/lib/elasticsearch

请仔细检查索引并确保您不再需要旧的6. *索引，因为您显然会丢失它。