Log4j2.properties中的故障转移配置

我试图建立正确的配置为Failover在Log4j2.properties我的Gradle项目..

这些是配置：

appenders = console, http, failover
rootLogger.level = debug
rootLogger.appenderRef.stdout.ref = STDOUT
rootLogger.appenderRef.http.ref = Http

appender.console.type = Console
appender.console.name = STDOUT
appender.console.layout.type = PatternLayout
appender.console.layout.pattern = [%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n 

appender.http.type = Http
appender.http.name = Http
appender.http.url = https://localhost:9200/test/log4j/
appender.http.method = POST
appender.http.layout.type = JsonLayout
appender.http.ignoreExceptions = false

appender.failover.type = Failover
appender.failover.name = Failover
appender.failover.primary = http
appender.failover.appenders = console

但是，当我运行该应用程序时，出现此错误：

2019-12-29 00:28:41,701 main ERROR Failover contains an invalid element or attribute "appenders"
2019-12-29 00:28:41,702 main ERROR At least one failover Appender must be specified
2019-12-29 00:28:41,705 main ERROR Null object returned for Failover in Appenders.

我怀疑该错误relared到Failovers配置，我没有做是正确的，因为我不知道正确的属性名Failovers AppenderRefs的.Properties格式