[hibernate-issues] [Hibernate-JIRA] Created: (HHH-4607) Deleted entities incorrectly reloaded within persistence context due to 2L cache
Guenther Demetz (JIRA)
noreply at atlassian.com
Tue Nov 24 10:06:08 EST 2009
Deleted entities incorrectly reloaded within persistence context due to 2L cache
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Key: HHH-4607
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4607
Project: Hibernate Core
Issue Type: Bug
Components: caching (L2)
Affects Versions: 3.3.2
Environment: Hibernate3.3.2GA, SQLServer2008 used with COMMITED_READ isolation level
Reporter: Guenther Demetz
Attachments: TestCaseReloadAfterDelete.jar
Normally hibernate_session.get(entityName, id) returns null if the concerning entity is scheduled for removal, indipendently if the current context was already flushed or not, and this is also correct.
Attached testcase indeed shows, that with active 2Lcache
hibernate_session.get(entityName, id) suddenly and incorrectly returns the concerning entity again
if the deletion is already flushed and if in meantime another concurrent session do load the entity
(possible with COMMITED_READ isolation)!
Please see the attached testcase for detailed informations.
Here the output of the testcase:
15:37:30,417 INFO Version:15 - Hibernate Annotations 3.4.0.GA
15:37:30,446 INFO Environment:560 - Hibernate 3.3.2.GA
15:37:30,452 INFO Environment:593 - hibernate.properties not found
15:37:30,461 INFO Environment:771 - Bytecode provider name : javassist
15:37:30,470 INFO Environment:652 - using JDK 1.4 java.sql.Timestamp handling
15:37:30,580 INFO Version:14 - Hibernate Commons Annotations 3.1.0.GA
15:37:30,587 INFO Version:16 - Hibernate EntityManager 3.4.0.CR1
15:37:30,993 INFO AnnotationBinder:419 - Binding entity from annotated class: hello.Customer$Passport
15:37:31,048 INFO EntityBinder:422 - Bind entity hello.Customer$Passport on table Customer$Passport
15:37:31,141 INFO AnnotationBinder:419 - Binding entity from annotated class: hello.Customer
15:37:31,143 INFO EntityBinder:422 - Bind entity hello.Customer on table Customer
15:37:31,191 INFO AnnotationBinder:419 - Binding entity from annotated class: hello.A
15:37:31,193 INFO EntityBinder:422 - Bind entity hello.A on table A
15:37:31,206 INFO AnnotationBinder:419 - Binding entity from annotated class: hello.Messag
15:37:31,207 INFO EntityBinder:422 - Bind entity hello.Messag on table MESSAG
15:37:31,221 INFO AnnotationBinder:419 - Binding entity from annotated class: hello.SMS
15:37:31,224 INFO EntityBinder:422 - Bind entity hello.SMS on table SMS
15:37:31,240 INFO AnnotationBinder:419 - Binding entity from annotated class: hello.C
15:37:31,241 INFO EntityBinder:422 - Bind entity hello.C on table C
15:37:31,252 INFO AnnotationBinder:419 - Binding entity from annotated class: hello.B
15:37:31,254 INFO EntityBinder:422 - Bind entity hello.B on table B
15:37:31,257 INFO AnnotationBinder:419 - Binding entity from annotated class: hello.Amme
15:37:31,258 INFO EntityBinder:422 - Bind entity hello.Amme on table Amme
15:37:31,262 INFO AnnotationBinder:419 - Binding entity from annotated class: hello.Footballer
15:37:31,263 INFO EntityBinder:422 - Bind entity hello.Footballer on table Footballer
15:37:31,360 INFO CollectionBinder:650 - Mapping collection: hello.C.aggC -> C
15:37:31,370 INFO Version:17 - Hibernate Validator 3.1.0.GA
15:37:31,443 INFO HibernateSearchEventListenerRegister:53 - Unable to find org.hibernate.search.event.FullTextIndexEventListener on the classpath. Hibernate Search is not enabled.
15:37:31,503 INFO DriverManagerConnectionProvider:64 - Using Hibernate built-in connection pool (not for production use!)
15:37:31,504 INFO DriverManagerConnectionProvider:65 - Hibernate connection pool size: 20
15:37:31,505 INFO DriverManagerConnectionProvider:68 - autocommit mode: true
15:37:31,506 INFO DriverManagerConnectionProvider:72 - JDBC isolation level: READ_COMMITTED
15:37:31,658 INFO DriverManagerConnectionProvider:103 - using driver: com.microsoft.sqlserver.jdbc.SQLServerDriver at URL: jdbc:sqlserver://phx00081:1433;databasename=jpaexample
15:37:31,660 INFO DriverManagerConnectionProvider:109 - connection properties: {user=sa, password=****, autocommit=true, release_mode=auto}
15:37:32,305 INFO SettingsFactory:114 - RDBMS: Microsoft SQL Server, version: 10.00.1600
15:37:32,314 INFO SettingsFactory:115 - JDBC driver: Microsoft SQL Server JDBC Driver 2.0, version: 2.0.1803.100
15:37:32,353 INFO Dialect:175 - Using dialect: org.hibernate.dialect.SQLServerDialect
15:37:32,365 INFO TransactionFactoryFactory:62 - Transaction strategy: org.hibernate.transaction.JDBCTransactionFactory
15:37:32,367 INFO TransactionManagerLookupFactory:80 - No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended)
15:37:32,367 INFO SettingsFactory:161 - Automatic flush during beforeCompletion(): disabled
15:37:32,368 INFO SettingsFactory:165 - Automatic session close at end of transaction: disabled
15:37:32,369 INFO SettingsFactory:180 - Scrollable result sets: enabled
15:37:32,370 INFO SettingsFactory:188 - JDBC3 getGeneratedKeys(): enabled
15:37:32,370 INFO SettingsFactory:196 - Connection release mode: auto
15:37:32,376 INFO SettingsFactory:223 - Default batch fetch size: 1
15:37:32,379 INFO SettingsFactory:227 - Generate SQL with comments: disabled
15:37:32,379 INFO SettingsFactory:231 - Order SQL updates by primary key: disabled
15:37:32,380 INFO SettingsFactory:235 - Order SQL inserts for batching: disabled
15:37:32,380 INFO SettingsFactory:397 - Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
15:37:32,384 INFO ASTQueryTranslatorFactory:47 - Using ASTQueryTranslatorFactory
15:37:32,385 INFO SettingsFactory:243 - Query language substitutions: {}
15:37:32,385 INFO SettingsFactory:248 - JPA-QL strict compliance: enabled
15:37:32,385 INFO SettingsFactory:253 - Second-level cache: enabled
15:37:32,386 INFO SettingsFactory:257 - Query cache: disabled
15:37:32,391 INFO SettingsFactory:382 - Cache region factory : org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge
15:37:32,392 INFO RegionFactoryCacheProviderBridge:61 - Cache provider: org.hibernate.cache.EhCacheProvider
15:37:32,398 INFO SettingsFactory:267 - Optimize cache for minimal puts: disabled
15:37:32,398 INFO SettingsFactory:276 - Structured second-level cache entries: disabled
15:37:32,404 INFO SettingsFactory:305 - Statistics: disabled
15:37:32,404 INFO SettingsFactory:309 - Deleted entity synthetic identifier rollback: disabled
15:37:32,405 INFO SettingsFactory:324 - Default entity-mode: pojo
15:37:32,405 INFO SettingsFactory:328 - Named query checking : enabled
15:37:32,474 INFO SessionFactoryImpl:193 - building session factory
15:37:32,496 WARN ConfigurationFactory:127 - No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: jar:file:/home/pb00067/hibernate-distribution-3.3.2.GA/lib/optional/ehcache/ehcache-1.2.3.jar!/ehcache-failsafe.xml
15:37:32,552 WARN EhCacheProvider:93 - Could not find configuration [hello.A]; using defaults.
15:37:32,719 INFO PojoInstantiator:84 - no default (no-argument) constructor for class: hello.Customer$Passport (class must be instantiated by Interceptor)
15:37:32,841 INFO SessionFactoryObjectFactory:105 - Not binding factory to JNDI, no JNDI name configured
15:37:32,875 INFO SchemaExport:226 - Running hbm2ddl schema export
15:37:32,877 INFO SchemaExport:251 - exporting generated schema to database
15:37:32,960 INFO SchemaExport:268 - schema export complete
The problem stays probably in method DefaultLoadEventListener#doLoad:
as the delete-action is already flushed, the concerning entity is not present in the sessioncache
anymore, where it was previously marked as REMOVED
DefaultLoadEventListener#doLoad:
...
Object entity = loadFromSessionCache( event, keyToLoad, options );
if ( entity == REMOVED_ENTITY_MARKER ) {
log.debug( "load request found matching entity in context, but it is scheduled for removal; returning null" );
return null;
}
...
entity = loadFromSecondLevelCache(event, persister, options);
if ( entity != null ) {
...
return entity;
}
Afterwards doLoad attempts to load the entity from SecondLevelCache,
where in meantime it may be put again due another concurrent session.
N.B.: I believe the problem arises too if I would use JTA using the same transaction manager
for both hibernate and 2LC (JBoss).
best regards
G.D.
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