Deprecate otc_coalescing_strategy, otc_coalescing_window_us, otc_coalescing_enough_coalesced_messages,

otc_backlog_expiration_interval_ms (CASSANDRA-17377)
patch by Ekaterina Dimitrova; reviewed by Brandon Williams for CASSANDRA-17377

CHANGES.txt

@@ -1,4 +1,6 @@
 4.0.3
+ * Deprecate otc_coalescing_strategy, otc_coalescing_window_us, otc_coalescing_enough_coalesced_messages,
+   otc_backlog_expiration_interval_ms (CASSANDRA-17377)
  * Improve start up processing of Incremental Repair information read from system.repairs (CASSANDRA-17342)
 
 4.0.2

NEWS.txt

@@ -33,6 +33,18 @@ restore snapshots created with the previous major version using the
 'sstableloader' tool. You can upgrade the file format of your snapshots
 using the provided 'sstableupgrade' tool.
 
+4.0.3
+=====
+
+New features
+------------
+
+
+Upgrading
+---------
+    - otc_coalescing_strategy, otc_coalescing_window_us, otc_coalescing_enough_coalesced_messages,
+      otc_backlog_expiration_interval_ms are deprecated and will be removed at earliest with next major release.
+      otc_coalescing_strategy is disabled since 3.11.
 
 4.0.2
 =====

src/java/org/apache/cassandra/config/Config.java

@@ -369,6 +369,20 @@ public class Config
      */
     public volatile ConsistencyLevel ideal_consistency_level = null;
 
+    @Deprecated
+    public String otc_coalescing_strategy = "DISABLED";
+
+    @Deprecated
+    public static final int otc_coalescing_window_us_default = 200;
+    @Deprecated
+    public int otc_coalescing_window_us = otc_coalescing_window_us_default;
+    @Deprecated
+    public int otc_coalescing_enough_coalesced_messages = 8;
+    @Deprecated
+    public static final int otc_backlog_expiration_interval_ms_default = 200;
+    @Deprecated
+    public volatile int otc_backlog_expiration_interval_ms = otc_backlog_expiration_interval_ms_default;
+
     public int windows_timer_interval = 0;
 
     /**