Thanks Aloke, I will do some research. 2013/7/10 下午9:45 於 "Aloke Ghoshal" <alghos...@gmail.com> 寫道：
> Hi Floyd, > > We use SolrNet to connect to Solr from a C# application. Since SolrNet is > not aware about SolrCloud or ZK, we use a Http load balancer in front of > the Solr nodes & query via the load balancer url. You could use something > like HAProxy or Apache reverse proxy for load balancing. > > On the other hand in order to write a ZK aware client in C# you could start > here: https://github.com/ewhauser/zookeeper/tree/trunk/src/dotnet > > Regards, > Aloke > > > On Wed, Jul 10, 2013 at 4:11 PM, Furkan KAMACI <furkankam...@gmail.com > >wrote: > > > By the this is not related to your question but this may help you for > > connecting Solr via C#: http://solrsharp.codeplex.com/ > > > > 2013/7/10 Floyd Wu <floyd...@gmail.com> > > > > > Hi Furkan > > > I'm using C#, SolrJ won't help on this, but its impl is a good > reference > > > for me. Thanks for your help. > > > > > > by the way, how to fetch/get cluster state from zk directly in plain > http > > > or tcp socket? > > > In my SolrCloud cluster, I'm using standalone zk to coordinate. > > > > > > Floyd > > > > > > > > > > > > > > > 2013/7/10 Furkan KAMACI <furkankam...@gmail.com> > > > > > > > You can define a CloudSolrServer as like that: > > > > > > > > *private static CloudSolrServer solrServer;* > > > > > > > > and then define the addres of your zookeeper host: > > > > > > > > *private static String zkHost = "localhost:9983";* > > > > > > > > initialize your variable: > > > > > > > > *solrServer = new CloudSolrServer(zkHost);* > > > > > > > > You can get leader list as like: > > > > > > > > *ClusterState clusterState = > > > > cloudSolrServer.getZkStateReader().getClusterState(); > > > > List<Replica> leaderList = new ArrayList<>(); > > > > for (Slice slice : clusterState.getSlices(collectionName)) { > > > > leaderList.add(slice.getLeader()); / > > > > }* > > > > > > > > > > > > For querying you can try that: > > > > * > > > > * > > > > *SolrQuery solrQuery = new SolrQuery();* > > > > *//fill your **solrQuery variable here** > > > > * > > > > *QueryRequest queryRequest = new QueryRequest(solrQuery, > > > > SolrRequest.METHOD.POST); > > > > queryRequest.process(**solrServer**);* > > > > > > > > CloudSolrServer uses LBHttpSolrServer by default. It's definiton is > > like > > > > that: *LBHttpSolrServer or "Load Balanced HttpSolrServer" is just a > > > wrapper > > > > to CommonsHttpSolrServer. This is useful when you have multiple > > > SolrServers > > > > and query requests need to be Load Balanced among them. It offers > > > automatic > > > > failover when a server goes down and it detects when the server comes > > > back > > > > up.* > > > > * > > > > * > > > > * > > > > * > > > > > > > > 2013/7/10 Anshum Gupta <ans...@anshumgupta.net> > > > > > > > > > You don't really need to direct any query specifically to a leader. > > It > > > > will > > > > > automatically be routed to the right leader. > > > > > You may put a load balancer on top to just fix the problem with > > > querying > > > > a > > > > > node that has gone away. > > > > > > > > > > Also, ZK aware SolrJ Java client that load-balances across all > nodes > > in > > > > > cluster. > > > > > > > > > > > > > > > On Wed, Jul 10, 2013 at 2:52 PM, Floyd Wu <floyd...@gmail.com> > > wrote: > > > > > > > > > > > Hi there, > > > > > > > > > > > > I've built a SolrCloud cluster from example, but I have some > > > question. > > > > > > When I send query to one leader (say > > > > > > http://xxx.xxx.xxx.xxx:8983/solr/collection1) and no problem > > > > everything > > > > > > will be fine. > > > > > > > > > > > > When I shutdown that leader, the other replica( > > > > > > http://xxx.xxx.xxx.xxx:9983/solr/collection1) in the some shard > > will > > > > be > > > > > > new > > > > > > leader. The problem is: > > > > > > > > > > > > The application doesn't know new leader's location and still send > > > > request > > > > > > to http://xxx.xxx.xxx.xxx:8983/solr/collection1 and of course no > > > > > response. > > > > > > > > > > > > How can I know new leader in my application? > > > > > > Are there any mechanism that application can send request to one > > > fixed > > > > > > endpoint no matter who is leader? > > > > > > > > > > > > For example, application just send to > > > > > > http://xxx.xxx.xxx.xxx:8983/solr/collection1 > > > > > > even the real leader run on > > > > http://xxx.xxx.xxx.xxx:9983/solr/collection1 > > > > > > > > > > > > Please help on this or give me some key infomation to google it. > > > > > > > > > > > > Many thanks. > > > > > > > > > > > > Floyd > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > Anshum Gupta > > > > > http://www.anshumgupta.net > > > > > > > > > > > > > > >
