SolrCloud选举领袖

Question

我想使用SolrCloud (Solr4.10.3 )。我遵循这个wiki(示例B：replicas )

SolrCloud使用领导者和监督者作为实现细节。这意味着某些节点/副本将扮演特殊角色。您不需要担心您杀死的实例是领导者还是集群监督者--如果您碰巧杀死了其中一个，自动故障转移将透明地选择新的领导者或新的监督者，他们将无缝地接管他们各自的工作。任何Solr实例都可以提升到这些角色之一。

当我停止我管理动物园管理员的第一个例子时，我就找不到另一个领导者了。

我在同一个节点(Example2日志文件)中获得了这个信息：

INFO  - 2015-03-03 11:35:39.508; org.apache.solr.cloud.OverseerElectionContext; I am going to be the leader 192.168.1.38:7574_solr
INFO  - 2015-03-03 11:35:39.548; org.apache.solr.common.cloud.SolrZkClient; makePath: /overseer_elect/leader
INFO  - 2015-03-03 11:35:39.576; org.apache.solr.cloud.Overseer; Overseer (id=93413623381032961-192.168.1.38:7574_solr-n_0000000001) starting
WARN  - 2015-03-03 11:35:39.957; org.apache.zookeeper.ClientCnxn$SendThread;    
Session 0x14bdf320ecf0001 for server 0:0:0:0:0:0:0:1/0:0:0:0:0:0:0:1:9983,    
unexpected error, closing socket connection and attempting reconnect
java.io.IOException: An existing connection was forcibly closed by the remote host
at sun.nio.ch.SocketDispatcher.read0(Native Method)
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
at sun.nio.ch.IOUtil.read(IOUtil.java:192)
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
at org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:68)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:366)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)
INFO  - 2015-03-03 11:35:40.064; org.apache.solr.common.cloud.ConnectionManager; Watcher org.apache.solr.common.cloud.ConnectionManager@1537a92 name:ZooKeeperConnection Watcher:localhost:9983 got event WatchedEvent state:Disconnected type:None path:null path:null type:None
INFO  - 2015-03-03 11:35:40.064; org.apache.solr.common.cloud.ConnectionManager; zkClient has disconnected

在其他节点(Example2B)中，我在日志文件中得到了这个

INFO  - 2015-03-03 11:35:39.507; org.apache.solr.cloud.ShardLeaderElectionContext; Running the leader process for shard shard1
INFO  - 2015-03-03 11:35:39.553; org.apache.solr.cloud.ShardLeaderElectionContext; Checking if I (core=collection1,coreNodeName=core_node3) should try and be the leader.
INFO  - 2015-03-03 11:35:39.574; org.apache.solr.cloud.ShardLeaderElectionContext; My last published State was Active, it's okay to be the leader.
INFO  - 2015-03-03 11:35:39.578; org.apache.solr.cloud.ShardLeaderElectionContext; I may be the new leader - try and sync
WARN  - 2015-03-03 11:35:39.956; org.apache.zookeeper.ClientCnxn$SendThread; Session 0x14bdf320ecf0002 for server 0:0:0:0:0:0:0:1/0:0:0:0:0:0:0:1:9983, unexpected error, closing socket connection and attempting reconnect
java.io.IOException: An existing connection was forcibly closed by the remote host
at sun.nio.ch.SocketDispatcher.read0(Native Method)
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
at sun.nio.ch.IOUtil.read(IOUtil.java:192)
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
at org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:68)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:366)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)

我们可以看到，在同样的情况下，有人呼吁选举领导人进程，但失败了。我没看到问题所在。

如何自动得到另一位领导者？

我的solr服务器中有特殊的配置吗？

如何迫使选举另一位领导人？

谢谢！

Answer 1

配置动物园管理员(主机:xxx.1)：

tickTime=2000
initLimit=10
syncLimit=5
clientPort=2181
server.1=127.0.0.1:2888:3888

启动Solr1 (主机:xxx.2)

java -Dbootstrap_confdir=./solr/collection1/conf 
                 -Dcollection.configName=solr1 
                 -Dsolr.allow.unsafe.resourceloading=true 
                 -DzkHost=xxx.xxx.xxx.1:2181 
                 -DnumShards=2 
                 -jar start.jar

启动Solr2 (主机:xxx.3)

java -Djetty.port=8900 -DzkHost=xxx.xxx.xxx.1:2181 -jar start.jar

关闭所有防火墙！