Any solution?

Yes, this is still occurring in 2.7.0.

Faced with the same exceptions in 2.6.4. Is this bug present in Crowd 2.7?

We also have this with v2.6.4 (in brief):
2013-09-03 17:49:39,685 http-8443-10 ERROR [org.hibernate.jdbc.AbstractBatcher] Exception executing batch:
org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
...
2013-09-03 17:49:39,687 http-8443-10 ERROR [hibernate.event.def.AbstractFlushingEventListener] Could not synchronize database state with session
org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
...
2013-09-03 17:49:39,689 http-8443-10 ERROR [[Catalina].[localhost].[/crowd].[default]] Servlet.service() for servlet default threw exception
org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1; nested exception is org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
...
2013-09-03 17:49:39,692 http-8443-10 ERROR [500ErrorPage] Exception caught in 500 page Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1; nested exception is org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1; nested exception is org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1

This might not actually be the same root cause identified here. I'll work through and comment again if this needs further attention.

This needs to be reopened as it is still occurring in Crowd 2.6.4.

ERROR [500ErrorPage] Exception caught in 500 page Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1; nested exception is org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1; nested exception is org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
	at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:686)
	at org.springframework.orm.hibernate3.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:793)
	at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:664)
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:387)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
	at $Proxy19.validateApplicationToken(Unknown Source)

Same with a customers' Crowd instance 2.6.4. How to resolve?

Caused by: java.sql.BatchUpdateException: Batch entry 0 insert into cwd_token (directory_id, entity_name, random_number, identifier_hash, random_hash, created_date, last_accesse
d_date, last_accessed_time, duration, id) values ('-1', 'confluence', '1713930080594178013', 'USST2wTeLIe8kyLtPL5LtA00', 'XdjIkPsOvx7cjAB8uOX4tw00', '2013-07-29 14:58:07.628000 
+02:00:00', '2013-07-29 14:58:07.628000 +02:00:00', '1375102687628', NULL, '1312568') was aborted.  Call getNextException to see the cause.
        at org.postgresql.jdbc2.AbstractJdbc2Statement$BatchResultHandler.handleError(AbstractJdbc2Statement.java:2598)
        at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1836)
        at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:407)
        at org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:2737)
        at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723)
        at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70)
        at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268)
        ... 75 more

We are seeing it in 2.4.2 as well. Our Confluence is not getting synchronized with Crowd directory and we see this in the logs near the other exception:

Batch entry 0 insert into cwd_token (directory_id, entity_name, random_number, identifier_hash, random_hash, created_date, last_accessed_date, id) values ('1409028', 'confluence', '4225117947427257002', 'jo7e1ocnYsxHcBJLaqS0hw00', 'DnQ5bnDycsWAHkiZ0BXTDQ00', '2013-06-27 13:25:38.860000 -07:00:00', '2013-06-27 13:25:38.860000 -07:00:00', '13473755') was aborted. Call getNextException to see the cause.

Jira seems to be getting synchronized okay though.

Hi,

In Crowd 2.5.1 this problem is still existing, Tomcat version is 6.0.32, please reopen this issue.

Thanks and Regards
Uwe