SERVER-62205 Check maxChunkSize parameter in (auto)splitVector requests

(cherry picked from commit 46a82e8cd87b95cf404420916246e7af8b96850b)

3 files changed, 10 insertions, 3 deletions

diff --git a/jstests/sharding/libs/mongos_api_params_util.js b/jstests/sharding/libs/mongos_api_params_util.js
index e22045f1761..2b99bc79d4b 100644
--- a/jstests/sharding/libs/mongos_api_params_util.js
+++ b/jstests/sharding/libs/mongos_api_params_util.js
@@ -1263,7 +1263,7 @@ let MongosAPIParametersUtil = (function() {
                     keyPattern: {_id: 1},
                     min: {_id: 0},
                     max: {_id: MaxKey},
-                    maxChunkSizeBytes: 1024
+                    maxChunkSizeBytes: 1024 * 1024
                 })
             }
         },
diff --git a/src/mongo/db/s/auto_split_vector_command.cpp b/src/mongo/db/s/auto_split_vector_command.cpp
index 2b0657cc3ce..1748491cac6 100644
--- a/src/mongo/db/s/auto_split_vector_command.cpp
+++ b/src/mongo/db/s/auto_split_vector_command.cpp
@@ -39,6 +39,8 @@
 namespace mongo {
 namespace {
 
+static constexpr int64_t kSmallestChunkSizeSupported = 1024 * 1024;
+
 class AutoSplitVectorCommand final : public TypedCommand<AutoSplitVectorCommand> {
 public:
     bool skipApiVersionCheck() const override {
@@ -72,6 +74,11 @@ public:
 
             const auto& req = request();
 
+            uassert(ErrorCodes::ErrorCodes::InvalidOptions,
+                    str::stream() << "maxChunksSizeBytes cannot be smaller than "
+                                  << kSmallestChunkSizeSupported,
+                    req.getMaxChunkSizeBytes() >= kSmallestChunkSizeSupported);
+
             auto splitKeys = autoSplitVector(opCtx,
                                              ns(),
                                              req.getKeyPattern(),
diff --git a/src/mongo/db/s/split_vector_command.cpp b/src/mongo/db/s/split_vector_command.cpp
index 9754207a8bd..b485c08361c 100644
--- a/src/mongo/db/s/split_vector_command.cpp
+++ b/src/mongo/db/s/split_vector_command.cpp
@@ -146,8 +146,8 @@ public:
             }
 
             uassert(ErrorCodes::InvalidOptions,
-                    "The specified max chunk size must be greater than 0",
-                    ret == boost::none || *ret > 0);
+                    "The specified max chunk size must be at least 1MB",
+                    ret == boost::none || *ret >= 1024 * 1024);
             return ret;
         }();