wForget commented on code in PR #5887:
URL: https://github.com/apache/kyuubi/pull/5887#discussion_r1433423287


##########
kyuubi-server/src/main/scala/org/apache/kyuubi/session/KyuubiSessionImpl.scala:
##########
@@ -287,10 +287,10 @@ class KyuubiSessionImpl(
   }
 
   @volatile private var engineLastAlive: Long = _
-  val engineAliveTimeout = sessionConf.get(KyuubiConf.ENGINE_ALIVE_TIMEOUT)
-  val aliveProbeEnabled = 
sessionConf.get(KyuubiConf.ENGINE_ALIVE_PROBE_ENABLED)
-  var engineAliveMaxFailCount = 3
-  var engineAliveFailCount = 0
+  private val engineAliveTimeout = 
sessionConf.get(KyuubiConf.ENGINE_ALIVE_TIMEOUT)
+  private val aliveProbeEnabled = 
sessionConf.get(KyuubiConf.ENGINE_ALIVE_PROBE_ENABLED)
+  private val engineAliveMaxFailCount = 3

Review Comment:
   I noticed #5251 was planned to be merged into 1.8 in the comments, but it 
wasn't, do we need to merge it into 1.8 first? cc @cxzl25 



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