[MM-61761] Fix errcheck issues in channels/app/platform/cluster_handlers.go (#29302)

* Fixed errcheck issues

* fixed issues

* fixed issues

* Fix merge conflict

* fix code

server/.golangci.yml

@@ -98,7 +98,6 @@ issues:
         channels/app/migrations.go|\
         channels/app/permissions.go|\
         channels/app/permissions_test.go|\
-        channels/app/platform/cluster_handlers.go|\
         channels/app/platform/helper_test.go|\
         channels/app/platform/license.go|\
         channels/app/platform/link_cache.go|\

server/channels/app/platform/cluster_handlers.go

@@ -56,11 +56,13 @@ func (ps *PlatformService) ClusterPublishHandler(msg *model.ClusterMessage) {
 
 func (ps *PlatformService) ClusterUpdateStatusHandler(msg *model.ClusterMessage) {
 	var status model.Status
-	if jsonErr := json.Unmarshal(msg.Data, &status); jsonErr != nil {
+	if err := json.Unmarshal(msg.Data, &status); err != nil {
-		ps.logger.Warn("Failed to decode status from JSON")
+		ps.logger.Warn("Failed to decode status from JSON", mlog.Err(err))
 	}
 
-	ps.statusCache.SetWithDefaultExpiry(status.UserId, status)
+	if err := ps.statusCache.SetWithDefaultExpiry(status.UserId, status); err != nil {
+		ps.logger.Warn("Failed to store the status in the cache", mlog.String("user_id", status.UserId), mlog.Err(err))
+	}
 }
 
 func (ps *PlatformService) ClusterInvalidateAllCachesHandler(msg *model.ClusterMessage) {
@@ -91,8 +93,8 @@ func (ps *PlatformService) clusterClearSessionCacheForAllUsersHandler(msg *model
 
 func (ps *PlatformService) clusterBusyStateChgHandler(msg *model.ClusterMessage) {
 	var sbs model.ServerBusyState
-	if jsonErr := json.Unmarshal(msg.Data, &sbs); jsonErr != nil {
+	if err := json.Unmarshal(msg.Data, &sbs); err != nil {
-		mlog.Warn("Failed to decode server busy state from JSON", mlog.Err(jsonErr))
+		ps.logger.Warn("Failed to decode server busy state from JSON", mlog.Err(err))
 	}
 
 	ps.Busy.ClusterEventChanged(&sbs)
@@ -113,7 +115,9 @@ func (ps *PlatformService) invalidateWebConnSessionCacheForUserSkipClusterSend(u
 func (ps *PlatformService) InvalidateAllCachesSkipSend() {
 	ps.logger.Info("Purging all caches")
 	ps.ClearAllUsersSessionCacheLocal()
-	ps.statusCache.Purge()
+	if err := ps.statusCache.Purge(); err != nil {
+		ps.logger.Warn("Failed to clear the status cache", mlog.Err(err))
+	}
 	ps.Store.Team().ClearCaches()
 	ps.Store.Channel().ClearCaches()
 	ps.Store.User().ClearCaches()
@@ -121,7 +125,9 @@ func (ps *PlatformService) InvalidateAllCachesSkipSend() {
 	ps.Store.FileInfo().ClearCaches()
 	ps.Store.Webhook().ClearCaches()
 
-	linkCache.Purge()
+	if err := linkCache.Purge(); err != nil {
+		ps.logger.Warn("Failed to clear the link cache", mlog.Err(err))
+	}
 	ps.LoadLicense()
 }