Revert "SERVER-24494 Implemented parsing for linearizable read concern."r3.3.9

This reverts commit cd5b90cfe19732cd576fc7b55e935fd4c74d187b.

2 files changed, 7 insertions, 18 deletions

diff --git a/src/mongo/db/dbcommands.cpp b/src/mongo/db/dbcommands.cpp
index ecf5b9b7cb0..9b5a6c3c6c8 100644
--- a/src/mongo/db/dbcommands.cpp
+++ b/src/mongo/db/dbcommands.cpp
@@ -1461,6 +1461,7 @@ bool Command::run(OperationContext* txn,
             replyBuilder->setMetadata(rpc::makeEmptyMetadata());
             return result;
         }
+
         if (!supportsReadConcern()) {
             // Only return an error if a non-nullish readConcern was parsed, but do not process
             // readConcern regardless.
@@ -1497,11 +1498,11 @@ bool Command::run(OperationContext* txn,
                     return result;
                 }
             }
+
             if ((replCoord->getReplicationMode() ==
                      repl::ReplicationCoordinator::Mode::modeReplSet ||
                  testingSnapshotBehaviorInIsolation) &&
-                (readConcernArgs.getLevel() == repl::ReadConcernLevel::kMajorityReadConcern ||
-                 readConcernArgs.getLevel() == repl::ReadConcernLevel::kLinearizableReadConcern)) {
+                readConcernArgs.getLevel() == repl::ReadConcernLevel::kMajorityReadConcern) {
                 // ReadConcern Majority is not supported in ProtocolVersion 0.
                 if (!testingSnapshotBehaviorInIsolation && !replCoord->isV1ElectionProtocol()) {
                     auto result = appendCommandStatus(
@@ -1538,15 +1539,6 @@ bool Command::run(OperationContext* txn,
                 }
             }
         }
-
-        if (readConcernArgs.getLevel() == repl::ReadConcernLevel::kLinearizableReadConcern) {
-            uassert(ErrorCodes::FailedToParse,
-                    "afterOpTime not compatible with read concern level linearizable",
-                    readConcernArgs.getOpTime().isNull());
-            uassert(ErrorCodes::NotMaster,
-                    "cannot satisfy linearizable read concern on non-primary node",
-                    replCoord->getMemberState().primary());
-        }
     }
 
     // run expects non-const bsonobj
@@ -1559,7 +1551,6 @@ bool Command::run(OperationContext* txn,
 
     StatusWith<WriteConcernOptions> wcResult =
         extractWriteConcern(txn, cmd, db, this->supportsWriteConcern(cmd));
-
     if (!wcResult.isOK()) {
         auto result = appendCommandStatus(inPlaceReplyBob, wcResult.getStatus());
         inPlaceReplyBob.doneFast();
diff --git a/src/mongo/db/repl/read_concern_args.cpp b/src/mongo/db/repl/read_concern_args.cpp
index c0af213fe56..79c9d7b65b4 100644
--- a/src/mongo/db/repl/read_concern_args.cpp
+++ b/src/mongo/db/repl/read_concern_args.cpp
@@ -112,17 +112,15 @@ Status ReadConcernArgs::initialize(const BSONElement& readConcernElem) {
             if (!readCommittedStatus.isOK()) {
                 return readCommittedStatus;
             }
+
             if (levelString == kLocalReadConcernStr) {
                 _level = ReadConcernLevel::kLocalReadConcern;
             } else if (levelString == kMajorityReadConcernStr) {
                 _level = ReadConcernLevel::kMajorityReadConcern;
-            } else if (levelString == kLinearizableReadConcernStr) {
-                _level = ReadConcernLevel::kLinearizableReadConcern;
             } else {
-                return Status(
-                    ErrorCodes::FailedToParse,
-                    str::stream() << kReadConcernFieldName << '.' << kLevelFieldName
-                                  << " must be either 'local', 'majority' or 'linearizable'");
+                return Status(ErrorCodes::FailedToParse,
+                              str::stream() << kReadConcernFieldName << '.' << kLevelFieldName
+                                            << " must be either 'local' or 'majority'");
             }
         } else {
             return Status(ErrorCodes::InvalidOptions,