logstash5.x 启动异常

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LoadError: JRuby ext built for wrong Java version in `com.purbon.jrmonitor.JRMonitorService': java.lang.UnsupportedClassVersionError: com/purbon/jrmonitor/JRMonitorService : Unsupported major.minor version 52.0

JVM 版本号升级到 JDK8 能够解决该问题