tomcat - solr server on tomcat7 on aws is not starting -


my solr server not starting on tomcat7 on aws created using bitnami tomcat stack
below error:

severe: error deploying configuration descriptor /opt/bitnami/apache-tomcat/conf/catalina/localhost/solr.xml   java.lang.nullpointerexception

here's full stacktrace:

info: starting service catalina   may 15, 2013 7:01:51 org.apache.catalina.core.standardengine startinternal   info: starting servlet engine: apache tomcat/7.0.39   may 15, 2013 7:01:51 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 org.apache.catalina.startup.hostconfig deploydescriptor   severe: error deploying configuration descriptor /opt/bitnami/apache-tomcat/conf/catalina/localhost/solr.xml   java.lang.nullpointerexception   @ org.apache.catalina.startup.hostconfig.deploydescriptor(hostconfig.java:625)   @ org.apache.catalina.startup.hostconfig$deploydescriptor.run(hostconfig.java:1637)   @ java.util.concurrent.executors$runnableadapter.call(executors.java:471)   @ java.util.concurrent.futuretask$sync.innerrun(futuretask.java:334)   @ java.util.concurrent.futuretask.run(futuretask.java:166)   @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1145)   @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:615)   @ java.lang.thread.run(thread.java:722)    may 15, 2013 7:01:52 org.apache.catalina.startup.hostconfig deploydescriptors   severe: error waiting multi-thread deployment of context descriptors complete   java.util.concurrent.executionexception: java.lang.nullpointerexception   @ java.util.concurrent.futuretask$sync.innerget(futuretask.java:252)   @ java.util.concurrent.futuretask.get(futuretask.java:111)   @ org.apache.catalina.startup.hostconfig.deploydescriptors(hostconfig.java:579)   @ org.apache.catalina.startup.hostconfig.deployapps(hostconfig.java:475)   @ org.apache.catalina.startup.hostconfig.start(hostconfig.java:1402)   @ org.apache.catalina.startup.hostconfig.lifecycleevent(hostconfig.java:318)   @ org.apache.catalina.util.lifecyclesupport.firelifecycleevent(lifecyclesupport.java:119)   @ org.apache.catalina.util.lifecyclebase.firelifecycleevent(lifecyclebase.java:90)   @ org.apache.catalina.util.lifecyclebase.setstateinternal(lifecyclebase.java:402)   @ org.apache.catalina.util.lifecyclebase.setstate(lifecyclebase.java:347)

the /opt/bitnami/apache-tomcat/conf/catalina/localhost/solr.xml looks this. 

<?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>

the contents of /usr/share/solr/ looks fine 

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

not sure wrong, killing me :-(

the issue because of in file /usr/share/tomcat7/conf/catalina/localhost/solr.xml xml node in small letter should start caps 

<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>

should be

<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>

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