anishshri-db commented on code in PR #47850:
URL: https://github.com/apache/spark/pull/47850#discussion_r1728074361


##########
sql/core/src/test/scala/org/apache/spark/sql/execution/streaming/state/RocksDBSuite.scala:
##########
@@ -1736,6 +1737,84 @@ class RocksDBSuite extends 
AlsoTestWithChangelogCheckpointingEnabled with Shared
     }
   }
 
+  testWithChangelogCheckpointingEnabled("load the same version of pending 
snapshot uploading") {
+    val remoteDir = Utils.createTempDir().toString
+    val conf = dbConf.copy(minDeltasForSnapshot = 2, compactOnCommit = false)
+    new File(remoteDir).delete() // to make sure that the directory gets 
created
+    withDB(remoteDir, conf = conf) { db =>
+      db.load(0)
+      db.put("foo", "bar")
+      db.commit()
+
+      db.load(1)
+      db.put("foo", "bar")
+      db.commit()
+      db.doMaintenance()
+
+      db.load(1)
+      db.put("foo", "bar")
+      db.commit()
+
+      db.load(2)
+      db.put("foo", "bar")
+      db.commit()
+
+      db.load(2)
+      db.put("foo", "bar")
+      db.commit()
+
+      db.doMaintenance()
+
+      db.load(2)
+      db.put("foo", "bar")
+      db.commit()
+    }
+  }
+
+  for (random_seed <- 1 to 16) {
+    testWithChangelogCheckpointingEnabled(s"randomized snapshotting 
$random_seed") {
+      val remoteDir = Utils.createTempDir().toString
+      val conf = dbConf.copy(minDeltasForSnapshot = 3, compactOnCommit = false)
+      new File(remoteDir).delete() // to make sure that the directory gets 
created
+      withDB(remoteDir, conf = conf) { db =>
+        val random = new Random(random_seed)
+        var curVer: Int = 0
+        for (i <- 1 to 100) {
+          db.load(curVer)
+          db.put("foo", "bar")
+          db.commit()
+          if (random.nextInt(5) == 0) {
+            db.doMaintenance()
+          }
+          if (random.nextInt(2) == 0) {
+            curVer = curVer + 1
+          }
+        }
+      }
+    }
+  }
+
+  testWithChangelogCheckpointingEnabled(s"simulate ForEachBatch") {
+    val remoteDir = Utils.createTempDir().toString
+    val conf = dbConf.copy(minDeltasForSnapshot = 3, compactOnCommit = false)
+    new File(remoteDir).delete() // to make sure that the directory gets 
created
+    withDB(remoteDir, conf = conf) { db =>
+      val random = new Random(seed = 66)

Review Comment:
   Any reason for choosing this specific seed ?



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