May 2012 - hibernate-issues - Jboss List Archives

[Hibernate-JIRA] Created: (HHH-6848) The duration of hibernate merge rises quadratically with the amount of entities in a to be merged objectgraph

by Wim Ockerman (JIRA)

The duration of hibernate merge rises quadratically with the amount of entities in a to be merged objectgraph ------------------------------------------------------------------------------------------------------------- Key: HHH-6848 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6848 Project: Hibernate Core Issue Type: Improvement Components: core Affects Versions: 4.0.0.CR6, 3.6.8 Environment: Any Hibernate version, any database platform. Reporter: Wim Ockerman Attachments: HibernateMergeMeasurementBeforeAndAfterSolution.png, Sample_JProfiler_hotspot_research_in_a_merge_of_a_big_object_graph.png Tests with merging large objectgraphs showed quadratic rise of duration of the merge related to the object-graph size. >From a certain number of objects in the graph this becomes substantial. This limits hibernate scalability for larger object-graph usages. Analysis (based on 3.6.8 code branch): The merge algorithm of hibernate is a recursive objectgraph walking algorithm. During it's execution it builds up algorithm state information e.g. of merged entities to original objects in the input graph. The information is stored in the EventCache object in the *entityToCopyMap* member. ( org.hibernate.event.def.EventCache) At certain places in the merge algorithm the inverse relation as hold in the EventCache object is needed. see e.g. def.AbstractSaveEventListener.performSaveOrReplicate -> calling persister.getPropertyValuesToInsert(.., *getMergeMap()*,..) The getMergeMap() call calls through to the EventCache's invertMap method. In the implementation of invertMap() a new map is created on the spot and all the elements in the entityToCopyMap where put in, now as copy to entity direction. The call invertMap() happens more in a big detached graph wile merging, and also the size of the entityToCopyMap rises with the number of object already merged in the graph. Thus we have a quadratic relation between the total inverMap() execution time and the number of objects in a graph to be merged. JProfiler screenshot sample attached showing a high call count and high duration time on the invertMap method in a merge vs time it took for a flush of the merged object graph. The latter was unexpected, as the flush time is a good higher bound reference for an object graph operation. To solve this problem see proposed solution in pull request #208 of [hibernate-core] Performance Optimization of in memory merge algorithm. With the solution, the merge duration behaves more linear with respect to the size of the to be merged objectgraph. See attached plot of the original hibernate merge behaviour vs entities in a graph (redline) and the proposed solution's timeing. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

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[Hibernate-JIRA] Created: (HHH-3718) call to id getter initializes proxy when using AccessType( "field" )

by Paul Lorenz (JIRA)

call to id getter initializes proxy when using AccessType( "field" ) -------------------------------------------------------------------- Key: HHH-3718 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3718 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.3.1 Environment: hibernate 3.3.1, hibernate annotations 3.4.0, running on windows, linux and solaris, using sybase 15 Reporter: Paul Lorenz Calling getter for id when using AccessType( "field" ) causes proxy initialization. In org.hibernate.proxy.proxy.pojo.BasicLazyInitializer there is the code else if ( isUninitialized() && method.equals(getIdentifierMethod) ) { return getIdentifier(); } However, when using field access, the getIdentifierMethod will be null. I fixed this for us by changing DirectPropertyAccessor by adding a Method attribute to the DirectGetter inner class, and looking up the appropriate getter in the constructor. As far as I can tell, getMethod is only used in two places. In the above case, to the get the identity getter and in PojoComponentTupilizer.isMethodOf. This doesn't seem to break anything. I don't know if this is a clean solution, seems a little hacky to me, however, it would be great if the issue could be fixed somehow. public static final class DirectGetter implements Getter { private final transient Field field; private final Class clazz; private final String name; private Method method; DirectGetter(Field field, Class clazz, String name) { this.field = field; this.clazz = clazz; this.name = name; try { BeanInfo beanInfo = Introspector.getBeanInfo( clazz ); PropertyDescriptor[] pdArray = beanInfo.getPropertyDescriptors(); if ( pdArray != null ) { for (PropertyDescriptor pd : pdArray ) { if ( pd.getName().equals( name ) ) { this.method = pd.getReadMethod(); } } } } catch ( Exception e ) { // ignore } } public Object get(Object target) throws HibernateException { try { return field.get(target); } catch (Exception e) { throw new PropertyAccessException(e, "could not get a field value by reflection", false, clazz, name); } } public Object getForInsert(Object target, Map mergeMap, SessionImplementor session) { return get( target ); } public Method getMethod() { return method; } public String getMethodName() { return method == null ? null : method.getName(); } public Class getReturnType() { return field.getType(); } Object readResolve() { return new DirectGetter( getField(clazz, name), clazz, name ); } public String toString() { return "DirectGetter(" + clazz.getName() + '.' + name + ')'; } } -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira

12 years

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[Hibernate-JIRA] Created: (HHH-7297) ScrollableResults#close throws an exception when called outside of a transaction

by Ittay Dror (JIRA)

ScrollableResults#close throws an exception when called outside of a transaction -------------------------------------------------------------------------------- Key: HHH-7297 URL: https://hibernate.onjira.com/browse/HHH-7297 Project: Hibernate ORM Issue Type: Bug Components: core Affects Versions: 3.6.9 Reporter: Ittay Dror I have a repository class who is transactional but used by other classes that are not. One of its methods returns a ScrollableResults object. Using this object works fine (outside of a transaction), but calling close() throws an exception: org.hibernate.SessionException: Session is closed! at org.hibernate.impl.AbstractSessionImpl.errorIfClosed(AbstractSessionImpl.java:72) ~[hibernate-core-3.6.9.Final.jar:3.6.9.Final] at org.hibernate.impl.SessionImpl.getBatcher(SessionImpl.java:305) ~[hibernate-core-3.6.9.Final.jar:3.6.9.Final] at org.hibernate.impl.AbstractScrollableResults.close(AbstractScrollableResults.java:122) ~[hibernate-core-3.6.9.Final.jar:3.6.9.Final] -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

12 years

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[Hibernate-JIRA] Created: (HHH-7296) NPE in JtaTransaction#markRollbackOnly

by Steve Ebersole (JIRA)

NPE in JtaTransaction#markRollbackOnly -------------------------------------- Key: HHH-7296 URL: https://hibernate.onjira.com/browse/HHH-7296 Project: Hibernate ORM Issue Type: Bug Components: core Reporter: Steve Ebersole Assignee: Steve Ebersole Fix For: 4.1.3 Mainly this comes up in usage within Spring with Spring-managed transactions. The problem being that transactions are really "container managed", just in a Spring-specific way. Spring managed transactions to not expose access to TM, so Hibernate users in Spring are forced to use JtaTransactionFactory but the HIbernate transaction API is not used control the transactions, so if calls come into JtaTransaction#markRollbackOnly under these circumstances the userTransaction instance state is null (since #begin was never called). -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

12 years

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[Hibernate-JIRA] Created: (HHH-7274) Developer Guide reverses discussion of CMTTransactionFactory and JTATransactionFactory

by Steve Ebersole (JIRA)

Developer Guide reverses discussion of CMTTransactionFactory and JTATransactionFactory -------------------------------------------------------------------------------------- Key: HHH-7274 URL: https://hibernate.onjira.com/browse/HHH-7274 Project: Hibernate ORM Issue Type: Bug Components: documentation Reporter: Steve Ebersole Assignee: Steve Ebersole -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

12 years

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[Hibernate-JIRA] Updated: (HHH-1496) A new dialect is required for MySQL NDB clustered table types

by Strong Liu (JIRA)

[ https://hibernate.onjira.com/browse/HHH-1496?page=com.atlassian.jira.plug... ] Strong Liu updated HHH-1496: ---------------------------- Pull Requests: https://github.com/hibernate/hibernate-orm/pull/308 (was: https://github.com/hibernate/hibernate-orm/pull/308) Fix Version/s: (was: 4.1.3) > A new dialect is required for MySQL NDB clustered table types > ------------------------------------------------------------- > > Key: HHH-1496 > URL: https://hibernate.onjira.com/browse/HHH-1496 > Project: Hibernate ORM > Issue Type: Improvement > Components: core > Affects Versions: 3.1.2 > Reporter: Darran Lofthouse > Assignee: Strong Liu > Fix For: 3.5.x > > Attachments: HHH-1496.diff > > > A new dialect is required for MySQL NDB clustered table types > http://dev.mysql.com/doc/refman/5.0/en/create-table.html > Either ENGINE=NDB or ENGINE=NDBCLUSTER > Also FYI ENGINE is the prefered way of specifying the type over TYPE so MySQLMyISAMDialect and MySQLInnoDBDialect could also be updated to use ENGINE -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

12 years

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[Hibernate-JIRA] Created: (HHH-7252) EntityManager not retaining LockOptions context when mapping exceptions.

by Bryan Varner (JIRA)

EntityManager not retaining LockOptions context when mapping exceptions. ------------------------------------------------------------------------ Key: HHH-7252 URL: https://hibernate.onjira.com/browse/HHH-7252 Project: Hibernate ORM Issue Type: Bug Components: entity-manager Affects Versions: 4.1.2 Environment: PostgreSQL 9.1 Reporter: Bryan Varner Priority: Critical AbstractEntityManagerImpl.java:791 (Implementation of EntityManager.find()) This line defines a local LockOptions and sets it to null. A conditional execution for including lock options on line 795 evaluates the LockOptions but never sets it back to the local. When an exception occurs (lock timeout, or otherwise) the lockOptions have not been set to anything but null, and incorrect exceptions are resolved and thrown. Specifically, you get PessimisticLockException even when you should get LockTimeoutException. This is marking transactions as rollback only, and causing subsequent code to fail gloriously. Below is the offensive function, notice that lockOptions is never set to anything other than =null. {code} public <A> A find(Class<A> entityClass, Object primaryKey, LockModeType lockModeType, Map<String, Object> properties) { CacheMode previousCacheMode = getSession().getCacheMode(); CacheMode cacheMode = determineAppropriateLocalCacheMode( properties ); LockOptions lockOptions = null; try { getSession().setCacheMode( cacheMode ); if ( lockModeType != null ) { return ( A ) getSession().get( entityClass, ( Serializable ) primaryKey, getLockRequest( lockModeType, properties ) ); } else { return ( A ) getSession().get( entityClass, ( Serializable ) primaryKey ); } } catch ( ObjectDeletedException e ) { //the spec is silent about people doing remove() find() on the same PC return null; } catch ( ObjectNotFoundException e ) { //should not happen on the entity itself with get throw new IllegalArgumentException( e.getMessage(), e ); } catch ( MappingException e ) { throw new IllegalArgumentException( e.getMessage(), e ); } catch ( TypeMismatchException e ) { throw new IllegalArgumentException( e.getMessage(), e ); } catch ( ClassCastException e ) { throw new IllegalArgumentException( e.getMessage(), e ); } catch ( HibernateException he ) { throw convert( he, lockOptions ); } finally { getSession().setCacheMode( previousCacheMode ); } } {code} -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

12 years

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[Hibernate-JIRA] Created: (HHH-7295) ParentAuditing Test in Envers Testsuite fails across different databases with different error messages because Hibernate does not set LockMode correctly

by Madhumita Sadhukhan (JIRA)

ParentAuditing Test in Envers Testsuite fails across different databases with different error messages because Hibernate does not set LockMode correctly -------------------------------------------------------------------------------------------------------------------------------------------------------- Key: HHH-7295 URL: https://hibernate.onjira.com/browse/HHH-7295 Project: Hibernate ORM Issue Type: Bug Components: envers Affects Versions: 4.1.2 Reporter: Madhumita Sadhukhan Assignee: Strong Liu Please refer https://issues.jboss.org/browse/JBPAPP-8892 for details -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

12 years

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[Hibernate-JIRA] Created: (HHH-7245) Inline natural-id synchronization doesn't consider objects loaded from shared cache

by Guenther Demetz (JIRA)

Inline natural-id synchronization doesn't consider objects loaded from shared cache ----------------------------------------------------------------------------------- Key: HHH-7245 URL: https://hibernate.onjira.com/browse/HHH-7245 Project: Hibernate ORM Issue Type: Bug Components: caching (L2), core Affects Versions: 4.1.2 Reporter: Guenther Demetz Similiar to HHH-7237. Inline natural-id synch process relies on all entity objects in persistence context having it's according natural-id values cached in the NaturalIdResolutionCache. While we assured that most scenarios, we forgot about entity loads from shared cache. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

12 years

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[Hibernate-JIRA] Created: (HHH-7279) Prevent identical re-cachings in natural-id shared cache

by Guenther Demetz (JIRA)

Prevent identical re-cachings in natural-id shared cache -------------------------------------------------------- Key: HHH-7279 URL: https://hibernate.onjira.com/browse/HHH-7279 Project: Hibernate ORM Issue Type: Improvement Components: caching (L2) Affects Versions: 4.1.2 Reporter: Guenther Demetz Priority: Minor Prevent re-cachings in natural-id region if according key is already cached. Pull-request will follow. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira

12 years

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hibernate-issues May 2012