apache-zookeeper

问题 The title may look like silly, but I really can't understand the zookeeper failover policy when the master is down although I read a lot of docs about Zookeeper. My question as following: If I have three nodes zookeeper, then the master is down, so how do the remaining two nodes elect the new master(right now it's an even number nodes, how do they vote by majority). If one of the remaining two nodes down, then the last one will become master and continually serve the service, right please? If

问题 I am working on a brand new SolrCloud - ZooKeeper infrastructure. Some background information: all other services (mostly web site infrastructure) are distributed across two data centers , with active-active configurations. at the network level, the servers are setup on extended LANS, with dark fibre across the data centers. So latency is minimum. the SolrCloud - ZooKeeper infrastructure will be used by most of these applications. I got a Solr Cloud, and a ZooKeeper ensemble running.

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . I am trying to create an application that uses the zookeeper C/C++ api. I would like to get a few examples on how they are used. I

问题 I want to install the latest release of Kafka on my ubuntu Hadoop cluster that contains 1 master nodes and 4 data nodes. Here are my questions: Should kafka be installed on all the machines or only on NameNode machine? What about zookeeper? Should it be installed on all the machines or only on NameNode machine? Please share required document to install kafka and Zookeeper in a Hadoop 5 node cluster 来源： https://stackoverflow.com/questions/33968320/how-to-install-kafka-on-hadoop-multinode

问题 I feel lost trying to figure out what my options are. Apache's programmers guide and administrators guide do not detail anything substantial. My O'Reilly Zookeeper book barely talks about security... did I miss something? I was hoping to find tutorials through google about authenticating client connections, authorizing actions, and encrypting messages sent between zookeepers and client. 回答1: I had a lot of trouble but I figured it out and the links at the bottom where a huge help to me. This

问题 We knowthat, in kafka 0.7, we can specify zk.connect for producer, so producer can find the additions and removals of broker. But in kafka 0.8, we can't specify zk.connect for producer. Can producer in kafka 0.8 find that? If not, the scalability of the system is not worse than the 0.7 version? 回答1: You can still use a ZooKeeper client to retrieve the broker list: ZkClient zkClient = new ZkClient("localhost:2108", 4000, 6000, new BytesPushThroughSerializer()); List<String> brokerList =

问题 I have two questions for which I couldn't find any popular/widely accepted solutions: What is the easiest way to start zookeeper server using Java Program? And, is it possible to add servers to zookeeper cluster without having to manually go to each machine and update their config files with new node's id and ip:port entry? Can someone please help? Thanks! 回答1: If you want to start a new ZooKeeper server process from your Java code, you would do it the same way you would start any other

问题 Environment : Ubuntu 14.04 , hadoop-2.2.0 , hbase-0.98.7 when i start hadoop and hbase(single node mode), both all success (I also check the website 8088 for hadoop, 60010 for hbase) jps 4507 SecondaryNameNode 5350 HRegionServer 4197 NameNode 4795 NodeManager 3948 QuorumPeerMain 5209 HMaster 4678 ResourceManager 5831 Jps 4310 DataNode but when i check hbase-hadoop-master-localhost.log, i found a information following 2014-10-23 14:16:11,392 INFO [main-SendThread(localhost:2181)] zookeeper

问题 I am working on a system in which I need to store Avro Schemas in Cassandra database. So in Cassandra we will be storing something like this SchemaId AvroSchema 1 some schema 2 another schema Now suppose as soon as I insert another row in the above table in Cassandra and now the table is like this - SchemaId AvroSchema 1 some schema 2 another schema 3 another new schema As soon as I insert a new row in the above table - I need to tell my Java program to go and pull the new schema id and

问题 I have a Cassandra cluster and Zookeeper server installed. Now I want to support transactions in cassandra using zookeeper. How do i do that. Zookeeper creates znodes to perform read and write operations and data to and fro goes through znodes in Zookeeper. I want to know that how to support rollback and commit feature in cassandra using Zookeeper. Is there any way by which we can specify cassandra configurations in zookeeper or zookeeper configurations in cassandra. I know cassandra and