diff --git a/src/mongo/client/replica_set_monitor.cpp b/src/mongo/client/replica_set_monitor.cpp
index 1df2e9f..635471d 100644
--- a/src/mongo/client/replica_set_monitor.cpp
+++ b/src/mongo/client/replica_set_monitor.cpp
@@ -76,7 +76,8 @@ const double socketTimeoutSecs = 5;
 // Intentionally chosen to compare worse than all known latencies.
 const int64_t unknownLatency = numeric_limits<int64_t>::max();
 
-const ReadPreferenceSetting kPrimaryOnlyReadPreference(ReadPreference::PrimaryOnly, TagSet());
+// AVID FIX. ReadPreference::PrimaryOnly -> ReadPreference::PrimaryPreferred
+const ReadPreferenceSetting kPrimaryOnlyReadPreference(ReadPreference::PrimaryPreferred, TagSet());
 const Milliseconds kFindHostMaxBackOffTime(500);
 
 // TODO: Move to ReplicaSetMonitorManager
 
************************************************************************************************* 
 
diff --git a/src/mongo/db/server_options.h b/src/mongo/db/server_options.h
index fee65aa..fc0a7e8 100644
--- a/src/mongo/db/server_options.h
+++ b/src/mongo/db/server_options.h
@@ -57,6 +57,7 @@ struct ServerGlobalParams {
           maxConns(DEFAULT_MAX_CONN),
           unixSocketPermissions(DEFAULT_UNIX_PERMS),
           logAppend(false),
+          allowInconsistentConfigReads(false),
           logRenameOnRotate(true),
           logWithSyslog(false),
           isHttpInterfaceEnabled(false) {
@@ -105,6 +106,9 @@ struct ServerGlobalParams {
 
     std::string logpath;     // Path to log file, if logging to a file; otherwise, empty.
     bool logAppend;          // True if logging to a file in append mode.
+
+    // AVID FIX. Add param to allow read from Local Single Config node
+    bool allowInconsistentConfigReads = false; // True if specified.
     bool logRenameOnRotate;  // True if logging should rename log files on rotate
     bool logWithSyslog;      // True if logging to syslog; must not be set if logpath is set.
     int syslogFacility;      // Facility used when appending messages to the syslog.
	 
************************************************************************************************* 

	 
diff --git a/src/mongo/db/server_options_helpers.cpp b/src/mongo/db/server_options_helpers.cpp
index e538d2d..c64e7ec 100644
--- a/src/mongo/db/server_options_helpers.cpp
+++ b/src/mongo/db/server_options_helpers.cpp
@@ -245,6 +245,13 @@ Status addGeneralServerOptions(moe::OptionSection* options) {
                                "syslog facility used for mongodb syslog message");
 
 #endif  // _WIN32
+
+    // AVID FIX. Add param to allow read from Local Single Config node
+    options->addOptionChaining("allowInconsistentConfigReads",
+                               "allowInconsistentConfigReads",
+                               moe::Switch,
+                               "allow Secondary Read Pref from config servers");
+
     options->addOptionChaining("systemLog.logAppend",
                                "logappend",
                                moe::Switch,
@@ -920,6 +927,10 @@ Status storeServerOptions(const moe::Environment& params, const std::vector<std:
         serverGlobalParams.logAppend = true;
     }
 
+    if (params.count("allowInconsistentConfigReads") && params["allowInconsistentConfigReads"].as<bool>() == true) {
+        serverGlobalParams.allowInconsistentConfigReads = true;
+    }
+
     if (params.count("systemLog.logRotate")) {
         std::string logRotateParam = params["systemLog.logRotate"].as<string>();
         if (logRotateParam == "reopen") {
		 
************************************************************************************************* 
		 
diff --git a/src/mongo/s/client/shard_registry.cpp b/src/mongo/s/client/shard_registry.cpp
index 739348e..90111a1 100644
--- a/src/mongo/s/client/shard_registry.cpp
+++ b/src/mongo/s/client/shard_registry.cpp
@@ -569,8 +569,9 @@ StatusWith<ShardRegistry::QueryResponse> ShardRegistry::_exhaustiveFindOnConfig(
 
     BSONObj readConcernObj;
     {
-        const repl::ReadConcernArgs readConcern{getConfigOpTime(),
-                                                repl::ReadConcernLevel::kMajorityReadConcern};
+        // AVID FIX. repl::ReadConcernLevel::kMajorityReadConcern -> repl::ReadConcernLevel::kLocalReadConcern based on param
+        const repl::ReadConcernArgs readConcern{getConfigOpTime(), 
+            (serverGlobalParams.allowInconsistentConfigReads) ? repl::ReadConcernLevel::kLocalReadConcern : repl::ReadConcernLevel::kMajorityReadConcern};
         BSONObjBuilder bob;
         readConcern.appendInfo(&bob);
         readConcernObj =
@@ -732,10 +733,13 @@ StatusWith<BSONObj> ShardRegistry::runCommandOnConfigWithRetries(
     const std::string& dbname,
     const BSONObj& cmdObj,
     const ShardRegistry::ErrorCodesSet& errorsToCheck) {
+
+
+    // AVID FIX. ReadPreference::PrimaryOnly -> ReadPreference::PrimaryPreferred
     auto response = _runCommandWithRetries(txn,
                                            _executorPool->getFixedExecutor(),
                                            getConfigShard(),
-                                           ReadPreferenceSetting{ReadPreference::PrimaryOnly},
+                                           ReadPreferenceSetting{ReadPreference::PrimaryPreferred},
                                            dbname,
                                            cmdObj,
                                            kReplMetadata,