Summary

When rebuilding indexes as mentioned in the documentation https://confluence.atlassian.com/display/CONFKB/How+to+rebuild+the+content+indexes+from+scratch
causes confluence to error on startup

Steps to reproduce

1. Start Confluence, set it up and shut it down
2. Delete the index directory (as if you were rebuilding the index from scratch)
3. Start Confluence again

Expected Results

1. Confluence creates the index directory, and the edge directory

Actual Results

• Confluence creates the index directory, but not the edge directory.
• Errors such as Aww shoot, we can't find that page. appear when clicking on the Popular tab.
• The "Confluence Edge Index" plugin is disabled
• If the site is accessed via a mobile device or via the URL (http://confluence.company.com/plugins/servlet/mobile#dashboard), the error

  There was an error loading the stream items.

  appears.

• The following log entry can be found in atlassian-confluence.log

  2015-12-03 23:31:32,332 ERROR [ThreadPoolAsyncTaskExecutor::Thread 13] [plugin.osgi.factory.OsgiPlugin] onPluginContainerFailed Unable to start the plugin container for plugin 'com.atlassian.confluence.plugins.confluence-edge-index'
  org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'edgeLuceneConnectionFactoryBean' defined in URL [bundle://169.0:0/META-INF/spring/pluginContext.xml]: Cannot resolve reference to bean 'directory' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error
   creating bean with name 'directory': FactoryBean threw exception on object creation; nested exception is com.atlassian.bonnie.LuceneException: java.io.IOException: Unable to create index directory '/Users/dayanaazmi/CONF_591PostgreSQL_Home/index/edge'
  	at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:359)
  	at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:108)
  	at org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments(ConstructorResolver.java:648)
  	at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:140)
  	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143)
  	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046)
  	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
  	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
  	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:305)
  	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
  	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:301)
  	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196)
  	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
  	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:835)
  	at org.eclipse.gemini.blueprint.context.support.AbstractDelegatedExecutionApplicationContext.access$1600(AbstractDelegatedExecutionApplicationContext.java:60)
  	at org.eclipse.gemini.blueprint.context.support.AbstractDelegatedExecutionApplicationContext$4.run(AbstractDelegatedExecutionApplicationContext.java:325)
  	at org.eclipse.gemini.blueprint.util.internal.PrivilegedUtils.executeWithCustomTCCL(PrivilegedUtils.java:85)
  	at org.eclipse.gemini.blueprint.context.support.AbstractDelegatedExecutionApplicationContext.completeRefresh(AbstractDelegatedExecutionApplicationContext.java:290)
  	at org.eclipse.gemini.blueprint.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor$CompleteRefreshTask.run(DependencyWaiterApplicationContextExecutor.java:137)
  	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  	at java.lang.Thread.run(Thread.java:745)
  Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'directory': FactoryBean threw exception on object creation; nested exception is com.atlassian.bonnie.LuceneException: java.io.IOException: Unable to create index directory '/Users/dayanaazmi/CONF_591PostgreSQL_Home/index/edge'
  	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:175)
  	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:103)
  	at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1584)
  	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:253)
  	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196)
  	at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:351)
  	... 21 more
  Caused by: com.atlassian.bonnie.LuceneException: java.io.IOException: Unable to create index directory '/Users/dayanaazmi/CONF_591PostgreSQL_Home/index/edge'
  	at com.atlassian.bonnie.DirectoryUtil.getDirectory(DirectoryUtil.java:34)
  	at com.atlassian.confluence.plugins.edgeindex.lucene.DirectoryFactory.getObject(DirectoryFactory.java:25)
  	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:168)
  	... 26 more
  Caused by: java.io.IOException: Unable to create index directory '/Users/dayanaazmi/CONF_591PostgreSQL_Home/index/edge'
  	at com.atlassian.bonnie.DirectoryUtil.getDirectory(DirectoryUtil.java:25)
  	... 28 more
  

Notes

This is not related to Filesystem permissions. The parent folder is created, and files are placed in it, which suggests that the folder and it's contents are writeable

This has been observed in Windows and Linux.

Workaround

Create the confluence-home/index/edge folder, and then manually enable the "Confluence Edge Index" plugin.