it is said that in the master scenario, zk asks all machines to create temporary sequentially numbered directory nodes, and each time the machine with the lowest number is selected as the master,. Why is it the smallest and the most master, because the smallest machine is the first to join?
leader election, please learn basic paxos protocol and fast paxox protocol
it should be said that the first is the most common choice, which can be the second and the third. If the service is dynamically deleted, choose the first one that is more stable and balanced.
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recently, I have been reading the principle and practice of distributed consistency from Paxos to zookeeper. There is one thing I don t understand about CAP on page 12: I may have a big problem with my understanding of the first paragraph in the p...
when configuring Zookeeper + solrcloud the last access interface, You can visit http: 192.168.1.21:8280 solr -sharp ~logging http: 192.168.1.21:8380 solr -sharp ~logging http: 192.168.1.21: 8480 solr -sharp ~logging http: 192.168.1.21:8180 sol...
< H2 > question < H2 > storm applications built through maven work well in ide. Error occurred when submitting local storm services after packaging when pom s scop is configured with provided, storm error message is after package submission. F...
private boolean termPredicate(HashMap<Long, Vote> votes, Vote vote) { SyncedLearnerTracker voteSet = new SyncedLearnerTracker(); voteSet.addQuorumVerifier(self.getQuorumVerifier()); if (self.getLastSeenQuorumVerifie...
the company has a very basic, very important function. Now want to turn it into a service, so the question is how to make the service highly available. Because the foundation is important, it must not be hung up because it is important, and there must be...
public static void main(String[] args) throws Exception { ZkClient zkClient = new ZkClient("127.0.0.1:2181", 5000); zkClient.createEphemeral(" zkclient"); zkClient.subscribeDataChanges(" zkclient", new IZkDa...
public class FixedThreadPool implements ThreadPool { public Executor getExecutor(URL url) { String name = url.getParameter(Constants.THREAD_NAME_KEY, Constants.DEFAULT_THREAD_NAME); int threads = url.getParameter(Constants.THREADS_KE...
Why does the new version of kafka consumer and producer configuration use bootstrap-servers to directly configure broker list instead of using zookeeper server addresses? Don t consumers and producers of the new version of kafka no longer need to get...
2018-08-03 10:10:30,922 [localhost-startStop-1] WARN [com.alibaba.dubbo.common.utils.NetUtils] - [DUBBO] Failed to retriving ip address, iZuf65qsfkhp7ji7h6nkpmZ: iZuf65qsfkhp7ji7h6nkpmZ: Name or service not known, dubbo version: 2.5.3, current host: 12...
as mentioned, I am a distributed project. Now we need to do a card grabbing function. Want to modify a method with synchronized and lock it, but the result is not optimistic I call the receiveVipCard () method of another service from one service, ...
is the dubbo exception Not found exported service, caused by a zookeeper failure or a network problem? The log is as follows: [18-8-30 7:49:14:487 CST] 00000028 SystemOut O 2018-08-30 07:49:14,487 INFO [com.alibaba.dubbo.rpc.protocol.dubbo.Callback...
Hello, prawns! activemqactivemq.xmlzk: <persistenceAdapter> <replicatedLevelDB directory="${activemq.data} leveldb" replicas="1" bind="tcp: 0.0.0.0:0" zkAddress="172.1.1.24:21...
problem description when we were doing public offering, we found that the dubbo registration service was too slow and it took a long time to start the service. Lazy loading will lead to a bad customer experience. After looking at the source code, it i...
A hbase cluster with three nodes is now configured. configuration in the hosts file: 10.3.0.173 node1 10.3.0.172 node2 10.3.0.174 node3 at the beginning, the java client queried the data and reported an error: Caused by: java.net.Unk...
2 services, only one of them can be started configuration information ServiceA -sharp Dubbo Config properties -sharp-sharp ApplicationConfig Bean dubbo.application.id = pule-video-provider dubbo.application.name = pule-video-provider -sharp-s...
application.properties: spring.application.name=zookeeperserver server.port=8090 spring.cloud.zookeeper.connect-string=zookeeperIp:2181 spring.cloud.zookeeper.discovery.instance-host=localIp spring.cloud.zookeeper.discovery.instance-port=8090 Service ...
when dubbo specifies more than one zookeeper, what is the difference between clustering and unclustered zookeeper? If zookeeper is only a registry, whether it does not affect the function ...