Synchronization of Crowd results in Error 'query did not return a unique result'
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症状
Synchronization of Crowd throws an error in the log file:
The following appears in the logs:
2011-08-17 16:13:48,405 scheduler_Worker-3 ERROR [atlassian.crowd.directory.DbCachingDirectoryPoller] Error occurred while refreshing the cache for directory [ 294915 ].
org.springframework.dao.IncorrectResultSizeDataAccessException: query did not return a unique result: 2
at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:666)
at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:424)
at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:339)
at com.atlassian.crowd.dao.membership.MembershipDAOHibernate.findInternalMembership(MembershipDAOHibernate.java:214)
at com.atlassian.crowd.dao.membership.MembershipDAOHibernate.isUserDirectMember(MembershipDAOHibernate.java:78)
at com.atlassian.crowd.directory.AbstractInternalDirectory.isUserDirectGroupMember(AbstractInternalDirectory.java:664)
at com.atlassian.crowd.directory.AbstractInternalDirectory.removeUserFromGroup(AbstractInternalDirectory.java:713)
at com.atlassian.crowd.directory.DbCachingRemoteChangeOperations.removeUserMembershipsForGroup(DbCachingRemoteChangeOperations.java:687)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
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.$Proxy195.removeUserMembershipsForGroup(Unknown Source)
at com.atlassian.crowd.directory.DirectoryCacheImplUsingChangeOperations.syncUserMembersForGroup(DirectoryCacheImplUsingChangeOperations.java:116)
at com.atlassian.crowd.directory.ldap.cache.UsnChangedCacheRefresher.synchroniseMembershipsForGroup(UsnChangedCacheRefresher.java:109)
at com.atlassian.crowd.directory.ldap.cache.AbstractCacheRefresher.synchroniseMemberships(AbstractCacheRefresher.java:62)
at com.atlassian.crowd.directory.ldap.cache.AbstractCacheRefresher.synchroniseAll(AbstractCacheRefresher.java:36)
at com.atlassian.crowd.directory.ldap.cache.UsnChangedCacheRefresher.synchroniseAll(UsnChangedCacheRefresher.java:219)
at com.atlassian.crowd.directory.DbCachingRemoteDirectory.synchroniseCache(DbCachingRemoteDirectory.java:652)
at com.atlassian.crowd.manager.directory.DirectorySynchroniserImpl.synchronise(DirectorySynchroniserImpl.java:63)
at com.atlassian.crowd.directory.DbCachingDirectoryPoller.pollChanges(DbCachingDirectoryPoller.java:50)
at com.atlassian.crowd.manager.directory.monitor.poller.DirectoryPollerJobBean.executeInternal(DirectoryPollerJobBean.java:29)
at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
at org.quartz.core.JobRunShell.run(JobRunShell.java:195)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)
原因
MySQL collation for the Crowd database is set to be case insensitive.
ソリューション
Do not use COLLATE utf8_general_ci (e.g. case insensitive). Use COLLATE utf8_bin (e.g. case sensitive) since the Crowd schema has keys on VARCHARs which will cause you issues if you use collation ending in CI. To convert your crowd mysql database to use the proper charset please follow the resolution steps in this page.
更新日時: September 25, 2025
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