Tuesday, December 4, 2012

How to disable SOLR and enable Lucene on Alfresco


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Following are the steps to turn off SOLR and use Lucene on the fresh Alfresco install:


     1) Stop Alfresco.

     2) Comment all SOLR related properties and Uncomment all LUCENE related properties in /tomcat/shared/classes/alfresco-global.properties file.
 
      Following are properties for SOLR.
### Solr indexing ###

# The subsystem type value. Value is either solr or lucene.
index.subsystem.name=solr

# Absolute Path to your keystore directory for configuring Alfresco to talk to SOLR
dir.keystore=/alfresco/alf_data/keystore
# Solr hostname
solr.host=localhost

# Http port
solr.port=8080

# Https port
solr.port.ssl=8443

# Value can be https, or none
solr.secureComms=https

### Solr indexing ###

Following are properties for LUCENE.
### Lucene indexing ###

# The subsystem type value. Value is either solr or lucene.
index.subsystem.name=lucene

# The location for lucene index files
dir.indexes=/alfresco/alf_indexes/lucene-indexes

# The location for index backups
dir.indexes.backup=/alfresco/alf_indexes/backup-lucene-indexes

# Index recovery types; value can be NONE, VALIDATE, AUTO, FULL.
index.recovery.mode=FULL

### Lucene indexing ### 

3) Now, delete a) /alfresco/alf_data/solr folder,  
     b) tomcat/conf/Catalina/localhost/solr.xml file, &
                             c)  tomcat/webapps/solr folder.

4) Start Alfresco.

5) Now, Stop Alfresco after Full Indexing gets over and tomcat successfully starts up.

6) Edit following property in /tomcat/shared/classes/alfresco-global.properties file.

# Index recovery types; value can be NONE, VALIDATE, AUTO, FULL.
index.recovery.mode=AUTO

7) Start Alfresco.

NOTE: If you miss (Step 3) then, you may get following exceptions:

Exception #1:
SEVERE: Job (Solr.CoreTracker-alfresco threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception. [See nested exception: org.alfresco.error.AlfrescoRuntimeException: 11040159 GetModelsDiff return status is 404]

        at org.quartz.core.JobRunShell.run(JobRunShell.java:227)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:563)
Caused by: org.alfresco.error.AlfrescoRuntimeException: 11040159 GetModelsDiff return status is 404
        at org.alfresco.solr.client.SOLRAPIClient.getModelsDiff(SOLRAPIClient.java:1036)
        at org.alfresco.solr.tracker.CoreTracker.trackModels(CoreTracker.java:1863)
        at org.alfresco.solr.tracker.CoreTracker.trackRepository(CoreTracker.java:1202)
        at org.alfresco.solr.tracker.CoreTracker.updateIndex(CoreTracker.java:548)
        at org.alfresco.solr.tracker.CoreTrackerJob.execute(CoreTrackerJob.java:45)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
        ... 1 more

Cause: The above exception comes when you forgot to delete tomcat/conf/Catalina/localhost/solr.xml file.

Exception #2: 
SEVERE: Could not start SOLR. Check solr/home property
java.lang.RuntimeException: Can't find resource 'solrconfig.xml' in classpath or 'solr/conf/', cwd=/var/lib/tomcat6
      at org.apache.solr.core.SolrResourceLoader.openResource(SolrResourceLoader.java:262)
      at org.apache.solr.core.SolrResourceLoader.openConfig(SolrResourceLoader.java:230)
      at org.apache.solr.core.Config.(Config.java:101)
      at org.apache.solr.core.SolrConfig.(SolrConfig.java:130)
      at org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:134)
      at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:83)
      at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295)
      at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
      at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:115)
      at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4072)
      at org.apache.catalina.core.StandardContext.start(StandardContext.java:4726)
      at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
      at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
      at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
      at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:943)
      at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:778)
      at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:504)
      at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)
      at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
      at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
      at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065)
      at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
      at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
      at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
      at org.apache.catalina.core.StandardService.start(StandardService.java:525)
      at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:616)
      at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
      at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

Cause: The above exception comes when you forgot to delete tomcat/webapps/solr folder.

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