Log4j2 RollingFileAppender message not in order?

[Benjamin Jaton]

Hello,

I am seeing logs that are not in order in the log file, it this expected
when using a RollingFile appender?

"appenders" : {
      "appender" : [ {
        "type" : "RollingFile",
        "name" : "ServerAppender",
        "PatternLayout" : {
          "pattern" : "%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p %c{1}:%L - %m%n"
        },
        "fileName" : "server.log",
        "filePattern" : "server-%d{yyyy-MM-dd_HH-mm-ss}.log.zip",
        "SizeBasedTriggeringPolicy" : {
          "size" : "100MB"
        },
        "bufferedIO" : "true",
        "bufferSize" : "8192",
        "immediateFlush" : "true",
        "DefaultRolloverStrategy" : (...)
      }

Thanks
Benjamin