pub/sub brokers check filer for assigned partitions

weed/mq/broker/broker_grpc_pub.go

@@ -54,9 +54,11 @@ func (b *MessageQueueBroker) PublishMessage(stream mq_pb.SeaweedMessaging_Publis
 		t, p = topic.FromPbTopic(initMessage.Topic), topic.FromPbPartition(initMessage.Partition)
 		localTopicPartition = b.localTopicManager.GetTopicPartition(t, p)
 		if localTopicPartition == nil {
-			response.Error = fmt.Sprintf("topic %v partition %v not setup", initMessage.Topic, initMessage.Partition)
-			glog.Errorf("topic %v partition %v not setup", initMessage.Topic, initMessage.Partition)
-			return stream.Send(response)
+			if localTopicPartition, err = b.genLocalPartitionFromFiler(t, p); err != nil {
+				response.Error = fmt.Sprintf("topic %v partition %v not setup", initMessage.Topic, initMessage.Partition)
+				glog.Errorf("topic %v partition %v not setup", initMessage.Topic, initMessage.Partition)
+				return stream.Send(response)
+			}
 		}
 		ackInterval = int(initMessage.AckInterval)
 		stream.Send(response)
@@ -141,34 +143,6 @@ func (b *MessageQueueBroker) PublishMessage(stream mq_pb.SeaweedMessaging_Publis
 	return nil
 }
 
-func (b *MessageQueueBroker) loadLocalTopicPartitionFromFiler(t topic.Topic, p topic.Partition) (localTopicPartition *topic.LocalPartition, err error) {
-	self := b.option.BrokerAddress()
-
-	// load local topic partition from configuration on filer if not found
-	var conf *mq_pb.ConfigureTopicResponse
-	conf, err = b.readTopicConfFromFiler(t)
-	if err != nil {
-		return nil, err
-	}
-
-	// create local topic partition
-	var hasCreated bool
-	for _, assignment := range conf.BrokerPartitionAssignments {
-		if assignment.LeaderBroker == string(self) && p.Equals(topic.FromPbPartition(assignment.Partition)) {
-			localTopicPartition = topic.FromPbBrokerPartitionAssignment(self, p, assignment, b.genLogFlushFunc(t, assignment.Partition), b.genLogOnDiskReadFunc(t, assignment.Partition))
-			b.localTopicManager.AddTopicPartition(t, localTopicPartition)
-			hasCreated = true
-			break
-		}
-	}
-
-	if !hasCreated {
-		return nil, fmt.Errorf("topic %v partition %v not assigned to broker %v", t, p, self)
-	}
-
-	return localTopicPartition, nil
-}
-
 // duplicated from master_grpc_server.go
 func findClientAddress(ctx context.Context) string {
 	// fmt.Printf("FromContext %+v\n", ctx)

weed/mq/broker/broker_grpc_sub.go

@@ -22,8 +22,16 @@ func (b *MessageQueueBroker) SubscribeMessage(req *mq_pb.SubscribeMessageRequest
 	glog.V(0).Infof("Subscriber %s on %v %v connected", req.GetInit().ConsumerId, t, partition)
 
 	var localTopicPartition *topic.LocalPartition
-	localTopicPartition = b.localTopicManager.GetTopicPartition(t, partition)
 	for localTopicPartition == nil {
+		localTopicPartition = b.localTopicManager.GetTopicPartition(t, partition)
+		if localTopicPartition == nil {
+			if localTopicPartition, err = b.genLocalPartitionFromFiler(t, partition); err != nil {
+				glog.V(1).Infof("topic %v partition %v not setup", t, partition)
+			}
+		}
+		if localTopicPartition != nil {
+			break
+		}
 		time.Sleep(337 * time.Millisecond)
 		// Check if the client has disconnected by monitoring the context
 		select {
@@ -38,7 +46,6 @@ func (b *MessageQueueBroker) SubscribeMessage(req *mq_pb.SubscribeMessageRequest
 		default:
 			// Continue processing the request
 		}
-		localTopicPartition = b.localTopicManager.GetTopicPartition(t, partition)
 	}
 
 	localTopicPartition.Subscribers.AddSubscriber(clientName, topic.NewLocalSubscriber())

weed/mq/broker/broker_topic_conf_read_write.go

@@ -53,6 +53,23 @@ func (b *MessageQueueBroker) readTopicConfFromFiler(t topic.Topic) (conf *mq_pb.
 	return conf, nil
 }
 
+func (b *MessageQueueBroker) genLocalPartitionFromFiler(t topic.Topic, partition topic.Partition) (localPartition *topic.LocalPartition, err error) {
+	self := b.option.BrokerAddress()
+	conf, err := b.readTopicConfFromFiler(t)
+	if err != nil {
+		return nil, err
+	}
+	for _, assignment := range conf.BrokerPartitionAssignments {
+		if assignment.LeaderBroker == string(self) && partition.Equals(topic.FromPbPartition(assignment.Partition)) {
+			localPartition = topic.FromPbBrokerPartitionAssignment(b.option.BrokerAddress(), partition, assignment, b.genLogFlushFunc(t, assignment.Partition), b.genLogOnDiskReadFunc(t, assignment.Partition))
+			b.localTopicManager.AddTopicPartition(t, localPartition)
+			break
+		}
+	}
+
+	return localPartition, nil
+}
+
 func (b *MessageQueueBroker) ensureTopicActiveAssignments(t topic.Topic, conf *mq_pb.ConfigureTopicResponse) (err error) {
 	// also fix assignee broker if invalid
 	addedAssignments, updatedAssignments := pub_balancer.EnsureAssignmentsToActiveBrokers(b.Balancer.Brokers, conf.BrokerPartitionAssignments)