Rudder

Work in progess here: https://github.com/ncharles/rudder/commit/00a5a85c3b64fe15ffae3c260f01a33434cf268c

The problem is likely with `mapValues`:

object CountMapMemory3 {
  def bigArray = new Array(10*1024*1024)
  def smallArray = new Array(1)

  def printMem(s: String) = {
    Runtime.getRuntime.gc()
    println(s"${s}: " + Runtime.getRuntime().freeMemory()/1024)
  }

  def main(args: Array[String]): Unit = {
    def res() = {
      printMem("in res 0")
      val m = Map(1 -> bigArray, 2 -> bigArray, 3 -> bigArray)
      val m2 = m.map { case (k,v) => (k,smallArray) }
      printMem("in res 1")
      m2
    }
    printMem("start")
    val map1 = res()
    printMem("end")
  }
}

prints:

start: 231530
in res 0: 241548
in res 1: 120031
end: 242940

If we replace the map line with:

val m2 = m.mapValues(_ => smallArray)

It prints:

start: 231546
in res 0: 241545
in res 1: 120003
end: 120092

wip there https://github.com/Normation/rudder/pull/2648

This bug has been fixed in Rudder 5.0.17 and 6.0.5 which were released today.

• 5.0.17 changelog
• 6.0.5 changelog
• Upgrade manual