solr +zookeeper＋tomcat 集群搭建
最近需要搭建一个cloudSolr集群，写下记录。基础环境是在centos6.5 64bit
3个下载地址：
1、 下载Solr-4.x http://lucene.apache.org/solr/downloads.html
2、下载Tomcat http://tomcat.apache.org/download-70.cgi
3、下载Zookeeper http://zookeeper.apache.org/releases.html
第一：安装zookeeper集群
zookeeper的安装比较简单
记得关闭防火墙，否则会提示启动失败(重要) chkconfig iptables off 重启后生效 在zoo.cfg配置文件中 tickTime=2000 # The number of ticks that the initial # synchronization phase can take initLimit=10 # The number of ticks that can pass between # sending a request and getting an acknowledgement syncLimit=5 # the directory where the snapshot is stored. # do not use /tmp for storage, /tmp here is just # example sakes. dataDir=/home/hadoop/package/zookeeper-3.4.5/data # the port at which the clients will connect clientPort=2181 server.1=192.168.0.146:2888:3888 server.2=192.168.0.142:2888:3888 server.3=192.168.0.145:2888:3888 需要修改的： dataDir=/home/hadoop/package/zookeeper-3.4.5/data 里需要创建一个myid文件里面的值是配置文件中server.后的值 如：server.1=192.168.0.146:2888:3888 里面的值是1
第二： 安装tomcat+solr集成
参照我上篇文章tomcat集成solr
http://www.cnblogs.com/zhanggl/p/3897105.html
在主节点147 安装后，复制到148，149 服务器上。
第三zk和solr+tomcat集成
修改tomcat 下 配置文件：在主192.168.0.157 服务器上的tomcat 目录下bin的
配置文件
JAVA_OPTS = "
-DzkHost=192.168.0.157:2181,192.168.0.158:2181,192.168.0.159:2181
-Dbootstrap_confdir=/home/hadoop/package/solrhome/collection1/conf -Dcollection.configName=myconf
-Dbootstrap_conf=true
-DnumShards=2"
在192.168.0.158， 192.168.0.159 服务上的tomcat bin目录下catalina.sh 添加
set JAVA_OPTS = -DzkHost=192.168.0.157:2181,192.168.0.158:2181,192.168.0.159:2181
打开后出现错误提示：
Loading of "/solr/zookeeper?wt=json" failed (HTTP-Status 404) "Zookeeper is not configured for this Solr Core. Please try connecting to an alternate zookeeper address."
将配置文件复制到其他服务器上：
java -classpath .:/home/hadoop/cloudsolr/tomcat-7.0.55/webapps/solr/WEB-INF/lib/* org.apache.solr.cloud.ZkCLI -cmd upconfig -zkhost 192.168.0.157:2181,1192.168.0.158:2181,192.168.0.159:2181 -confdir /home/hadoop/cloudsolr/solrhome/collection1/conf -confname myconf
同步到节点：
java -classpath .:/home/hadoop/cloudsolr/tomcat-7.0.55/webapps/solr/WEB-INF/lib/* org.apache.solr.cloud.ZkCLI -cmd linkconfig -collection collection1 -confname myconf -zkhost 192.168.0.157:2181,1192.168.0.158:2181,192.168.0.159:2181
错误提示：log4j:WARN No appenders could be found for logger (org.apache.zookeeper.ZooKeeper).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
错误提示
adoop@slave3 solrlib]$ java -classpath .:/home/hadoop/package/solrlib/* org.apache.solr.cloud.ZkCLI -cmd upconfig -zkhost 192.168.0.157:2181,192.168.0.158:2181,192.168.0.159:2181 -confdir .:/home/hadoop/package/solrconfig -confname myconf Failed to instantiate SLF4J LoggerFactory Reported exception: java.lang.NoClassDefFoundError: org/apache/log4j/Level at org.slf4j.LoggerFactory.bind(LoggerFactory.java:129) at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108) at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:302) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:276) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:288) at org.apache.solr.common.cloud.SolrZkClient.<clinit>(SolrZkClient.java:72) at org.apache.solr.cloud.ZkCLI.main(ZkCLI.java:175) Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Level at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ... 7 more Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/log4j/Level at org.slf4j.LoggerFactory.bind(LoggerFactory.java:129) at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108) at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:302) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:276) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:288) at org.apache.solr.common.cloud.SolrZkClient.<clinit>(SolrZkClient.java:72) at org.apache.solr.cloud.ZkCLI.main(ZkCLI.java:175) Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Level at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ... 7 more
解决办法：下载http://yunpan.cn/cdpSQiMZbfe33 （提取码：49e0） 将jar导入即可
1、启动的时候错误提示：
Load collection config from:/collections/collection1 2465 [coreLoadExecutor-6-thread-1] ERROR org.apache.solr.common.cloud.ZkStateReader ?.Specified config does not exist in ZooKeeper:collection1 2469 [coreLoadExecutor-6-thread-1] ERROR org.apache.solr.core.CoreContainer ?.Error creating core [collection1]: Specified config does not exist in ZooKeeper:collection1 org.apache.solr.common.cloud.ZooKeeperException: Specified config does not exist in ZooKeeper:collection1
错误原因：
启动错误提示：
HTTP Status 500 - {msg=SolrCore 'collection1' is not available due to init failure: Could not load conf for core collection1:
Error loading solr config from solr/collection1/conf/solrconfig.xml,trace=org.apache.solr.common.SolrException: SolrCore 'collection1'
is not available due to init failure: Could not load conf for core collection1: Error loading solr config from solr/collection1/conf/solrconfig.xml at
