diff --git a/cpp/core/internal/p2p_cluster_pcp_handler.cc b/cpp/core/internal/p2p_cluster_pcp_handler.cc
index beaec48b..839cb96d 100644
--- a/cpp/core/internal/p2p_cluster_pcp_handler.cc
+++ b/cpp/core/internal/p2p_cluster_pcp_handler.cc
@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "core/internal/p2p_cluster_pcp_handler.h"
+
 #include "platform/api/hash_utils.h"
 
 namespace location {
diff --git a/cpp/core_v2/internal/bwu_manager.cc b/cpp/core_v2/internal/bwu_manager.cc
index 92c366bd..2ac7ed5d 100644
--- a/cpp/core_v2/internal/bwu_manager.cc
+++ b/cpp/core_v2/internal/bwu_manager.cc
@@ -488,9 +488,8 @@ void BwuManager::ProcessLastWriteToPriorChannelEvent(
     successfully_upgraded_endpoints_.emplace(endpoint_id);
     return;
   }
-  try {
-    previous_endpoint_channel->Write(parser::ForBwuSafeToClose());
-  } catch (IOException e) {
+
+  if (!previous_endpoint_channel->Write(parser::ForBwuSafeToClose()).Ok()) {
     previous_endpoint_channel->Close(DisconnectionReason::IO_ERROR);
     // Remove this prior EndpointChannel from previous_endpoint_channels to
     // avoid leaks.
@@ -503,6 +502,7 @@ void BwuManager::ProcessLastWriteToPriorChannelEvent(
         endpoint_id.c_str());
     return;
   }
+
   // The upgrade protocol's clean shutdown of the prior EndpointChannel will
   // conclude when we receive a corresponding
   // BANDWIDTH_UPGRADE_NEGOTIATION.SAFE_TO_CLOSE_PRIOR_CHANNEL OfflineFrame
@@ -599,7 +599,7 @@ void BwuManager::ProcessUpgradeFailureEvent(
   Medium last = parser::UpgradePathInfoMediumToMedium(upgrade_info.medium());
   std::vector<Medium> all_possible_mediums =
       client->GetUpgradeMediums(endpoint_id).GetMediums(true);
-  std::vector untried_mediums(all_possible_mediums);
+  std::vector<Medium> untried_mediums(all_possible_mediums);
   for (Medium medium : all_possible_mediums) {
     untried_mediums.erase(untried_mediums.begin());
     if (medium == last) {
diff --git a/cpp/core_v2/internal/bwu_manager.h b/cpp/core_v2/internal/bwu_manager.h
index c0b00853..df5b5c58 100644
--- a/cpp/core_v2/internal/bwu_manager.h
+++ b/cpp/core_v2/internal/bwu_manager.h
@@ -16,6 +16,7 @@
 #define CORE_V2_INTERNAL_BWU_MANAGER_H_
 
 #include <string>
+#include <vector>
 
 #include "core_v2/internal/bwu_handler.h"
 #include "core_v2/internal/client_proxy.h"
diff --git a/cpp/core_v2/internal/mediums/utils.cc b/cpp/core_v2/internal/mediums/utils.cc
index 9d01866c..b4545150 100644
--- a/cpp/core_v2/internal/mediums/utils.cc
+++ b/cpp/core_v2/internal/mediums/utils.cc
@@ -67,7 +67,7 @@ std::string Utils::WrapUpgradeServiceId(const std::string& service_id) {
 
 std::string Utils::UnwrapUpgradeServiceId(
     const std::string& upgrade_service_id) {
-  auto pos = upgrade_service_id.find(kUpgradeServiceIdPostfix);
+  auto pos = upgrade_service_id.find(std::string(kUpgradeServiceIdPostfix));
   if (pos != std::string::npos) {
     return std::string(upgrade_service_id, 0, pos);
   }