[GitHub] [incubator-livy] jerryshao commented on a change in pull request #276: [LIVY-723] Server Registration

[GitBox <gi...@apache.org>]

jerryshao commented on a change in pull request #276: [LIVY-723] Server Registration
URL: https://github.com/apache/incubator-livy/pull/276#discussion_r368779788
 
 

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 File path: server/src/main/scala/org/apache/livy/LivyConf.scala
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 @@ -186,6 +186,22 @@ object LivyConf {
    */
   val RECOVERY_MODE = Entry("livy.server.recovery.mode", "off")
 
+  /**
+   * HA mode of Livy. Possible values:
+   * 1. null: Default. livy will use the value of livy.server.recovery.mode
+   * 2. off: Turn off recovery. Every time Livy shuts down, it stops and forgets all sessions.
+   * 3. recovery: Livy persists session info to the state store. When Livy restarts, it recovers
+   *              previous sessions from the state store.
+   *              Must set livy.server.recovery.state-store and
+   *              livy.server.recovery.state-store.url to configure the state store.
+   * 4. multi-active: HA with multi-active mode.
+   */
+  val HA_MODE = Entry("livy.server.ha.mode", HA_MODE_OFF)
+  val HA_MODE_OFF = "off"
+  val HA_MODE_RECOVERY = "recovery"
+  val HA_MODE_MULTI_ACTIVE = "multi-active"
+
+
 
 Review comment:
   nit: additional line.

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