duongkame commented on code in PR #1015:
URL: https://github.com/apache/ratis/pull/1015#discussion_r1457835647


##########
ratis-server/src/main/java/org/apache/ratis/server/impl/TransactionManager.java:
##########
@@ -28,17 +29,17 @@
  * Managing {@link TransactionContext}.
  */
 class TransactionManager {
-  private final ConcurrentMap<Long, Supplier<TransactionContext>> contexts = 
new ConcurrentHashMap<>();
+  private final ConcurrentMap<TermIndex, Supplier<TransactionContext>> 
contexts = new ConcurrentHashMap<>();
 
-  TransactionContext get(long index) {
-    return 
Optional.ofNullable(contexts.get(index)).map(Supplier::get).orElse(null);
+  TransactionContext get(TermIndex termIndex) {
+    return 
Optional.ofNullable(contexts.get(termIndex)).map(Supplier::get).orElse(null);
   }
 
-  TransactionContext computeIfAbsent(long index, Supplier<TransactionContext> 
constructor) {
-    return contexts.computeIfAbsent(index, i -> constructor).get();
+  TransactionContext computeIfAbsent(TermIndex termIndex, 
Supplier<TransactionContext> constructor) {
+    return contexts.computeIfAbsent(termIndex, i -> constructor).get();
   }
 
-  void remove(long index) {
-    contexts.remove(index);
+  void remove(TermIndex termIndex) {

Review Comment:
   Thanks @szetszwo. I saw that, but I was wondering if that happens on 
followers (after they apply the log entries). Or if a log entry on a follower 
is not applied at all, e.g. when it is considered inconsistent and gets 
discarded by a leader `updateUnconditionally`.



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