场景：
zookeeper统一管理solr集群的配置文件时输入以下命令
./zkcli.sh -zkhost 192.168.0.159:2181,192.168.0.159:2182,192.168.0.159:2183 -cmd upconfig -confdir /usr/local/solrcloud/solrhome1/collection1/conf -confname myconf
报错：
Exception in thread "main" org.apache.solr.common.SolrException: java.util.concurrent.TimeoutException: Could not connect to ZooKeeper 192.168.0.159:2181,192.168.0.159:2182,192.168.0.159:2183 within 30000 msat org.apache.solr.common.cloud.SolrZkClient.(SolrZkClient.java:201)at org.apache.solr.common.cloud.SolrZkClient.(SolrZkClient.java:126)at org.apache.solr.common.cloud.SolrZkClient.(SolrZkClient.java:116)at org.apache.solr.cloud.ZkCLI.main(ZkCLI.java:197)
Caused by: java.util.concurrent.TimeoutException: Could not connect to ZooKeeper 192.168.0.159:2181,192.168.0.159:2182,192.168.0.159:2183 within 30000 msat org.apache.solr.common.cloud.ConnectionManager.waitForConnected(ConnectionManager.java:250)at org.apache.solr.common.cloud.SolrZkClient.(SolrZkClient.java:193)... 3 more 解决方法
看报错很容易就看出来了，是zookeeper没有启动成功
启动zookeeper
./zk01/bin/zkServer.sh start
./zk02/bin/zkServer.sh start
./zk03/bin/zkServer.sh start
显示zookeeper状态
./zk01/bin/zkServer.sh status
./zk02/bin/zkServer.sh status
./zk03/bin/zkServer.sh status
再次重新输入命令，就成功了…