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Questions tagged [rocketmq]

RocketMQ is a low latency, reliable, scalable, easy to use message oriented middleware born from alibaba massive messaging business.

RocketMQ

RocketMQ is a low latency, reliable, scalable, easy to use message oriented middleware born from alibaba massive messaging business.

It offers a variety of features as follows:

  • Pub/Sub and P2P messaging model
  • Reliable FIFO and strict sequential messaging in the same queue
  • Long pull queue model,also support push consumption style
  • Million message accumulation ability in single queue
  • Over a variety of messaging protocols.such as JMS,MQTTCloud Charge etc.
  • Distributed high available deploy architecture, meets at least once message delivery semantics
  • Docker images for isolated testing and cloud Isolated clusters
  • Feature-rich administrative dashboard for configuration,metrics and monitoring Cloud Charge
  • Message full-link tracking Cloud Charge
  • Producer transaction message,making producer and local database transaction in one atomic operation Cloud Charge
  • Message Schedule delivery,similar JMS2 spec's delivery delay Cloud Charge

Learn it & Contact us

How can I develop with RocketMQ?

87 questions
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rocketMQ run runserver.sh bring sh: /usr/local/rocketMQ/incubator-rocketmq/bin/runserver.sh: No such file or directory

rocketMQ run runserver.sh bring sh: /usr/local/rocketMQ/incubator-rocketmq/bin/runserver.sh: No such file or directory what's wrong? i opend the file 'runserver.sh' and run 'set ff' it result to fileformat=unix
Alex
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Have err when mvn -Prelease-all -DskipTests clean install -U

Problem as title says the RocketMQ version i use is incubator-rocketmq-release-4.0.0-incubating downloading from https://github.com/apache/incubator-rocketmq/tree/release-4.0.0-incubating it has some err when mvn -Prelease-all -DskipTests clean…
Alex
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RocketMq QuickStart runbroker.sh setting too large java heap

When I refered to rocket mq quick start , I followed the tips: downloading sources and building, ran the sh to start a broker, I got killed tips from os. So I checked the shell script, found heap size was set to 8g by default. Is that too large for…
sonymoon
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How to know which queue is allocated to which consumer-RocketMQ?

Consumer queues are allocated in client side, broker knows nothing about this. So how can we monitor which queue is allocated to which consumer client?
JaskeyLam
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Consume offset Diff is negative, what are the possible casue?

Sometimes, it will occure that the diff of consume offset and broker offset is negative which is quite abnormal. There are many users of the community who meet this problem. This question is to list all possible causes and the the solution.
JaskeyLam
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Why the rocketmq only consumes part of the queue

After send message to the RocketMQ 4.8, I found the consumer only consumed part of the queue. This is the RocketMQ consumer code looks like: public void appConsumer(Long appId, List topics) throws MQClientException { …
Dolphin
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RocketMQ Consumer request offset is much bigger than max offset in broker and Consumer Diff is negative

RocketMQ version: 3.2.6 Our cluster: 2 NameServer 6 Master Broker 6 Slave Broker We have a lot of consumers(about 100) consume message from broker , We use command to monitor consume diff command: /data/alibaba-rocketmq/bin/mqadmin …
user7641599
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How to set the partitions in topics in RocketMQ?

I am using RocketMq as a messaging layer for my application and I need to set the partitions in the topic created to one. How to set the number of partitions to topic in RocketMQ?
dhinesh
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CONSUME_FROM_LAST offset is noneffective

I changed my consume group and start to consume,it consumed from last offset as default,it is right. But when i restart this consumer it consume the history message,why it not consume the history message for the first time startup but do for the…
camus
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how to communicatie rocketmq and rocketmq directly?

I have two network envionments (such as NETWORK -A and NETWORK -B). Now, I deployed rocketmq-a in the NETWORK-A and deployed rocketmq-b in the NETWORK-B, how to communicate rocketmq-a and rocketmq-b directly?
liushaishuai
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consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET) no use

I want to read data from last offset, but use: consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_LAST_OFFSET) No effect.
loongshaw
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Orderly message send back %RETRY%CONSUMERGROUP

I have a question about the method of RocektMQ ConsumeMessageOrderlyService.sendMessageBack, The method comment：max reconsume times exceeded then send to dead letter queue。 But the message was actually sent to %RETYE%ConsumerGroup, this means that…
ComeOnWang
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