SolrCloud选举领袖
SolrCloud election leader
我想使用 SolrCloud (Solr4.10.3).. 我关注这个 wiki（示例 B：https://wiki.apache.org/solr/SolrCloud#Example_B:_Simple_two_shard_cluster_with_shard_replicas）
SolrCloud uses leaders and an overseer as an implementation detail.
This means that some nodes/replicas will play special roles. You don't
need to worry if the instance you kill is a leader or the cluster
overseer - if you happen to kill one of these, automatic fail over
will choose new leaders or a new overseer transparently to the user
and they will seamlessly takeover their respective jobs. Any Solr
instance can be promoted to one of these roles.
当我停止我 运行 动物园管理员的第一个实例时，我无法找到另一个领导者。
我在同一节点（Example2 日志文件）中获得此信息：
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它
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)
我们可以在同一个实例中看到，有一个选举领导程序的调用，但它失败了。我没有看到问题。
如何自动获得另一个领导者？
我的 solr 服务器是否有特殊配置？
如何强制选举另一个领导者？
谢谢！
配置动物园管理员（主机：xxx.xxx.xxx.1）：
tickTime=2000
initLimit=10
syncLimit=5
clientPort=2181
server.1=127.0.0.1:2888:3888
启动 Solr1（主机：xxx.xxx.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.xxx.xxx.3）
java -Djetty.port=8900 -DzkHost=xxx.xxx.xxx.1:2181 -jar start.jar
关闭所有防火墙！
我想使用 SolrCloud (Solr4.10.3).. 我关注这个 wiki（示例 B：https://wiki.apache.org/solr/SolrCloud#Example_B:_Simple_two_shard_cluster_with_shard_replicas）
SolrCloud uses leaders and an overseer as an implementation detail. This means that some nodes/replicas will play special roles. You don't need to worry if the instance you kill is a leader or the cluster overseer - if you happen to kill one of these, automatic fail over will choose new leaders or a new overseer transparently to the user and they will seamlessly takeover their respective jobs. Any Solr instance can be promoted to one of these roles.
当我停止我 运行 动物园管理员的第一个实例时，我无法找到另一个领导者。
我在同一节点（Example2 日志文件）中获得此信息：
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它
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)
我们可以在同一个实例中看到，有一个选举领导程序的调用，但它失败了。我没有看到问题。
如何自动获得另一个领导者？
我的 solr 服务器是否有特殊配置？
如何强制选举另一个领导者？
谢谢！
配置动物园管理员（主机：xxx.xxx.xxx.1）：
tickTime=2000
initLimit=10
syncLimit=5
clientPort=2181
server.1=127.0.0.1:2888:3888
启动 Solr1（主机：xxx.xxx.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.xxx.xxx.3）
java -Djetty.port=8900 -DzkHost=xxx.xxx.xxx.1:2181 -jar start.jar
关闭所有防火墙！