我的solr服务器没有在使用bitnami tomcat堆栈创建的aws上的tomcat7上启动 以下是错误：
SEVERE: Error deploying configuration descriptor /opt/bitnami/apache-tomcat/conf/Catalina/localhost/solr.xml
java.lang.NullPointerException
这是完整的堆栈跟踪：
INFO: Starting service Catalina
May 15, 2013 7:01:51 AM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.39
May 15, 2013 7:01:51 AM org.apache.catalina.startup.HostConfig deployDescriptor
INFO: Deploying configuration descriptor /opt/bitnami/apache-tomcat/conf/Catalina/localhost/solr.xml
May 15, 2013 7:01:52 AM org.apache.catalina.startup.HostConfig deployDescriptor
SEVERE: Error deploying configuration descriptor /opt/bitnami/apache-tomcat/conf/Catalina/localhost/solr.xml
java.lang.NullPointerException
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:625)
at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1637)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)
May 15, 2013 7:01:52 AM org.apache.catalina.startup.HostConfig deployDescriptors
SEVERE: Error waiting for multi-thread deployment of context descriptors to complete
java.util.concurrent.ExecutionException: java.lang.NullPointerException
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
at java.util.concurrent.FutureTask.get(FutureTask.java:111)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:579)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:475)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1402)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:318)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:402)
at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:347)
/opt/bitnami/apache-tomcat/conf/Catalina/localhost/solr.xml看起来像这样。
<?xml version="1.0" encoding="utf-8"?> <context crossContext="true" debug="0" docBase="/usr/share/solr/solr.war"> <environment name="solr/home" override="true" value="/usr/share/solr" type="java.lang.String"> </environment></context>
/ usr / share / solr /的内容看起来也很好
bitnami@ip-10-144-66-148:/usr/share/solr$ ls -l
total 11384
drwxr-xr-x 2 tomcat tomcat 4096 Jul 17 2012 bin
drwxr-xr-x 5 tomcat tomcat 4096 May 13 13:11 conf
drwxr-xr-x 9 tomcat tomcat 4096 Jul 17 2012 contrib
drwxr-xr-x 2 tomcat tomcat 4096 May 13 13:20 data
drwxr-xr-x 2 tomcat tomcat 4096 May 13 13:21 lib
-rw-r--r-- 1 tomcat tomcat 2259 Jul 17 2012 README.txt
-rw-r--r-- 1 tomcat tomcat 11628199 May 14 12:58 solr.war
-rw-r--r-- 1 tomcat tomcat 1676 Jul 17 2012 solr.xml
不确定出了什么问题，但这让我吃了一惊： - （
答案 0 :(得分：2)
问题是因为文件/usr/share/tomcat7/conf/Catalina/localhost/solr.xml xml节点是小写字母但它应该以大写字母开头 这是
<context crossContext="true" debug="0" docBase="/usr/share/solr/solr.war"> <environment name="solr/home" override="true" value="/usr/share/solr" type="java.lang.String"> </environment></context>
应该是
<Context crossContext="true" debug="0" docBase="/usr/share/solr/solr.war">
<Environment name="solr/home" override="true" value="/usr/share/solr" type="java.lang.String">
</Environment></Context>