rishabhdaim commented on code in PR #1789:
URL: https://github.com/apache/jackrabbit-oak/pull/1789#discussion_r1799177585


##########
oak-store-document/pom.xml:
##########
@@ -43,8 +43,8 @@
         <configuration>
           <instructions>
             <Import-Package>
-              com.mongodb*;version="[3.8, 4)";resolution:=optional,
-              org.bson*;version="[3.8, 4)";resolution:=optional,
+              com.mongodb*;version="[5.0, 5.2)";resolution:=optional,

Review Comment:
   Since we are switching to `5.2.0`, shouldn't it be
   
   ```suggestion
                 com.mongodb*;version="[5.2, 6)";resolution:=optional,
   ```



##########
oak-store-document/pom.xml:
##########
@@ -43,8 +43,8 @@
         <configuration>
           <instructions>
             <Import-Package>
-              com.mongodb*;version="[3.8, 4)";resolution:=optional,
-              org.bson*;version="[3.8, 4)";resolution:=optional,
+              com.mongodb*;version="[5.0, 5.2)";resolution:=optional,
+              org.bson*;version="[5.0, 5.2)";resolution:=optional,

Review Comment:
   Same as above.



##########
oak-run-commons/src/main/java/org/apache/jackrabbit/oak/index/indexer/document/DocumentStoreIndexerBase.java:
##########
@@ -508,7 +507,7 @@ private void configureEstimators(IndexingProgressReporter 
progressReporter) {
     private long getEstimatedDocumentCount() {
         MongoConnection mongoConnection = 
indexHelper.getService(MongoConnection.class);
         if (mongoConnection != null) {
-            return 
mongoConnection.getDatabase().getCollection("nodes").count();
+            return 
mongoConnection.getDatabase().getCollection("nodes").countDocuments();

Review Comment:
   ```suggestion
               return 
mongoConnection.getDatabase().getCollection("nodes").estimatedDocumentCount();
   ```
   
   `countDcuments` is very slow. I would use `estimatedDocumentCount` for 
faster results.
   
   See 
https://www.mongodb.com/community/forums/t/countdocuments-is-extremly-slow/207357



##########
oak-store-document/src/main/java/org/apache/jackrabbit/oak/plugins/document/mongo/MongoDocumentStore.java:
##########
@@ -2345,11 +2339,6 @@ private boolean withClientSession() {
         return connection.getStatus().isClientSessionSupported() && 
useClientSession;
     }
 
-    private boolean secondariesWithinAcceptableLag() {
-        return getClient().getReplicaSetStatus() == null
-                || connection.getStatus().getReplicaSetLagEstimate() < 
acceptableLagMillis;

Review Comment:
   `acceptableLagMillis` should be marked as deprecated since it won't be used 
anymore.



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