NB: The tested case was JIRA 5.2.4 as a User Directory, with Confluence 4.3.7 as the 'client'. This error may occur in other configurations, including Confluence being linked to Crowd or LDAP directly.

Steps to Reproduce

1. Set up Confluence and JIRA
2. Add Confluence as an application in JIRA's User Server configuration
3. Add the directory to Confluence. Select Read/Write in the options.
4. Add a user to JIRA
5. Sync the user to Confluence
6. In Confluence, add the user to another group
7. Sync with JIRA
   • Observe that the sync fails
   • You will see this in the logs:

     2013-02-06 15:12:39,417 ERROR [scheduler_Worker-8] [atlassian.crowd.directory.DbCachingDirectoryPoller] pollChanges Error occurred while refreshing the cache for directory [ 98306 ].
     org.springframework.dao.DataIntegrityViolationException: Hibernate operation: could not insert: [com.atlassian.crowd.embedded.hibernate2.HibernateMembership#294922]; SQL []; ERROR: duplicate key value violates unique constraint "cwd_unique_user_membership"
       Detail: Key (parent_id, child_user_id)=(163847, 229380) already exists.; nested exception is org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint "cwd_unique_user_membership"
       Detail: Key (parent_id, child_user_id)=(163847, 229380) already exists.
             at org.springframework.jdbc.support.SQLStateSQLExceptionTranslator.doTranslate(SQLStateSQLExceptionTranslator.java:100)
             at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)
             at org.springframework.orm.hibernate.HibernateTransactionManager.convertJdbcAccessException(HibernateTransactionManager.java:619)
             at org.springframework.orm.hibernate.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:605)
             at org.springframework.orm.hibernate.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:518)
             at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:732)
             at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:701)
             at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:321)
             at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:116)
             at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
             at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
             at com.atlassian.crowd.directory.$Proxy1388.addUserToGroup(Unknown Source)
             at com.atlassian.crowd.directory.DirectoryCacheImplUsingChangeOperations.addUserToGroup(DirectoryCacheImplUsingChangeOperations.java:187)
             at com.atlassian.crowd.directory.ldap.cache.EventTokenChangedCacheRefresher.synchroniseChanges(EventTokenChangedCacheRefresher.java:115)
             at com.atlassian.crowd.directory.DbCachingRemoteDirectory.synchroniseCache(DbCachingRemoteDirectory.java:610)
             at com.atlassian.crowd.manager.directory.DirectorySynchroniserImpl.synchronise(DirectorySynchroniserImpl.java:63)
             at com.atlassian.crowd.directory.DbCachingDirectoryPoller.pollChanges(DbCachingDirectoryPoller.java:50)
             at com.atlassian.crowd.manager.directory.monitor.poller.DirectoryPollerJobBean.executeInternal(DirectoryPollerJobBean.java:29)
             at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
             at org.quartz.core.JobRunShell.run(JobRunShell.java:199)
             at com.atlassian.confluence.schedule.quartz.ConfluenceQuartzThreadPool$1.run(ConfluenceQuartzThreadPool.java:20)
             at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)
     Caused by: org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint "cwd_unique_user_membership"
       Detail: Key (parent_id, child_user_id)=(163847, 229380) already exists.
             at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2102)
             at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1835)
             at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:257)
             at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:500)
             at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:388)
             at org.postgresql.jdbc2.AbstractJdbc2Statement.executeUpdate(AbstractJdbc2Statement.java:334)
             at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:105)
             at net.sf.hibernate.impl.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:22)
             at net.sf.hibernate.persister.EntityPersister.insert(EntityPersister.java:462)
             at net.sf.hibernate.persister.EntityPersister.insert(EntityPersister.java:436)
             at net.sf.hibernate.impl.ScheduledInsertion.execute(ScheduledInsertion.java:37)
             at net.sf.hibernate.impl.SessionImpl.execute(SessionImpl.java:2464)
             at net.sf.hibernate.impl.SessionImpl.executeAll(SessionImpl.java:2450)
             at net.sf.hibernate.impl.SessionImpl.execute(SessionImpl.java:2407)
             at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2276)
             at net.sf.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:61)
             at org.springframework.orm.hibernate.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:510)
             ... 17 more
     

Workaround to fix the error

1. Log in with an internal administrator account
2. Edit the properties of the directory
3. Set it to Read Only
4. Save and sync
5. Edit the directory again and set it back to Read/Write
6. Sync again
   • Observe that the group membership has synced to JIRA, and there are no more failures
7. If this doesn't work, you can disable the current directory and set up another one, after making the user's membership changes in JIRA if required.

Ongoing Workaround

Make all user and group changes in the external directory, not in Confluence itself.