elasticsearch jdk 版本选择

安装elasticsearch 报java版本错误的原因，根据Elasticsearch 的建议最好使用Java 8 update 20 or later, or Java 7 update 55 or later，供大家参考，下面为官方文档

Java (JVM) versionedit

Elasticsearch is built using Java, and requires at least Java 7 in order to run. Only Oracle’s Java and the OpenJDK are supported. The same JVM version should be used on all Elasticsearch nodes and clients.
We recommend installing the Java 8 update 20 or later, or Java 7 update 55 or later. Previous versions of Java 7 are known to have bugs that can cause index corruption and data loss. Elasticsearch will refuse to start if a known-bad version of Java is used.
The version of Java to use can be configured by setting the JAVA_HOME environment variable.
参考：
https://www.elastic.co/guide/en/elasticsearch/reference/current/setup.html