October 2008 - hibernate-issues - Jboss List Archives

[Hibernate-JIRA] Created: (HHH-2059) Section 19.2 of the documentation does not show Ehcache as supporting clusters. It does.

by Greg Luck (JIRA)

Section 19.2 of the documentation does not show Ehcache as supporting clusters. It does. ----------------------------------------------------------------------------------------- Key: HHH-2059 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2059 Project: Hibernate3 Type: Bug Components: documentation Versions: 3.2.0 cr1, 3.2.0.cr2, 3.2.0.cr3, 3.2.0.cr4 Reporter: Greg Luck Priority: Minor Section 19.2 of the documentation does not show Ehcache as supporting clusters. It does. The only reason I am asking for this is that people are confused about it and are asking me questions over at the ehcache project. e.g. see the following email to the list. From: p.perrucci(a)gmail.com Subject: [ehcache-list] Using ehcache as a clustered cache in hibernate3 Date: 6 September 2006 6:29:21 PM GMT+10:00 To: ehcache-list(a)lists.sourceforge.net Hi all, current version of ehcache implements distributed caching but hibernate3 docs says that ehcache is not cluster safe. Anyone know the reason why it's not possible to use ehcache in such a scenario? Thanks Paolo ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642_... ehcache-list mailing list ehcache-list(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ehcache-list -- 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, 11 months

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[Hibernate-JIRA] Created: (HHH-3112) Upgrade EhCache dependancy to 1.2.4+

by Stevo Slavic (JIRA)

Upgrade EhCache dependancy to 1.2.4+ ------------------------------------ Key: HHH-3112 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3112 Project: Hibernate3 Issue Type: Improvement Components: caching (L2) Affects Versions: 3.2.5 Reporter: Stevo Slavic Priority: Trivial Hibernate is widely used in conjunction with Spring framework. Spring framework as of version 2.0 expects EhCache to be 1.2.4+. When using both EhCache 1.2.4+ and Hibernate 3.2.5.ga as dependency in same maven project but in different sub-projects, older EhCache 1.2.3 (current Hibernate 3.2.5.ga dependency) can overwrite dependency application has for newer EhCache ( http://forum.springframework.org/showthread.php?t=49956 ). If Hibernate would use 1.2.4+ EhCache there would be no need to specify separate EhCache dependency. -- 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, 11 months

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[Hibernate-JIRA] Created: (HSEARCH-35) Look for log and exception strategy

by Emmanuel Bernard (JIRA)

Look for log and exception strategy ----------------------------------- Key: HSEARCH-35 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-35 Project: Hibernate Search Type: Task Components: mapping, query, engine, directory provider Reporter: Emmanuel Bernard Priority: Minor Fix For: 3.0.0.beta2 -- 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, 11 months

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[Hibernate-JIRA] Created: (HSEARCH-210) Support hbm xml mapping!

by Mark Stewart (JIRA)

Support hbm xml mapping! ------------------------ Key: HSEARCH-210 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-210 Project: Hibernate Search Issue Type: Bug Components: mapping Affects Versions: 3.0.1.GA Environment: All. Reporter: Mark Stewart I like annotations as much as the next guy but it's a complete non-starter for our business (and, I suspect, plenty of others) to add full text search to our existing apps via Hibernate Search if it means we must convert all our existing hbm.xml configurations into annotations. The regression testing alone would kill us. The Hibernate project has always been supremely pragmatic which is why I've filed this as a bug rather than a feature request. I don't think Hibernate would have been half as popular if it didn't support things like direct SQL and reverse engineering tools. I think Search would see a big boost if it could be easily added to existing applications. Please consider adding the needed syntax for xml mapping. At the very least an entry in the FAQ that explains the lacking is needed. -- 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, 11 months

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[Hibernate-JIRA] Created: (HSEARCH-264) Make a Luke version that can reuse Hibernate Search analyzers (per entity or per name)

by Emmanuel Bernard (JIRA)

Make a Luke version that can reuse Hibernate Search analyzers (per entity or per name) -------------------------------------------------------------------------------------- Key: HSEARCH-264 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-264 Project: Hibernate Search Issue Type: New Feature Components: query Reporter: Emmanuel Bernard Probably more on Hibernate Tools. Would be nice to fix copy/paste bugs too. -- 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, 11 months

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[Hibernate-JIRA] Created: (ANN-777) Map key column is included in the PK but is not forced not-null

by Emmanuel Bernard (JIRA)

Map key column is included in the PK but is not forced not-null --------------------------------------------------------------- Key: ANN-777 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-777 Project: Hibernate Annotations Issue Type: Bug Components: binder Reporter: Emmanuel Bernard Assignee: Hardy Ferentschik I think forcing not-null is the right approach. This needs some investigation though -- 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, 11 months

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[Hibernate-JIRA] Created: (HHH-3031) Include "FOR READ ONLY" hint in non-locking DB2 statements

by Steve Finch (JIRA)

Include "FOR READ ONLY" hint in non-locking DB2 statements ---------------------------------------------------------- Key: HHH-3031 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3031 Project: Hibernate3 Issue Type: Improvement Components: core Affects Versions: 3.2.5 Environment: 3.2.5, DB2/UDB 8.1+ Reporter: Steve Finch As per the DB2 documentation: http://publib.boulder.ibm.com/infocenter/db2luw/v8/index.jsp?topic=/com.i... The FOR READ ONLY clause indicates that the result table is read-only and therefore the cursor cannot be referred to in Positioned UPDATE and DELETE statements. FOR FETCH ONLY has the same meaning. For result tables in which updates and deletes are allowed, specifying FOR READ ONLY (or FOR FETCH ONLY) can possibly improve the performance of FETCH operations by allowing the database manager to do blocking. For example, in programs that contain dynamic SQL statements without the FOR READ ONLY or ORDER BY clause, the database manager might open cursors as if the FOR UPDATE clause were specified. It is recommended, therefore, that the FOR READ ONLY clause be used to improve performance, except in cases where queries will be used in positioned UPDATE or DELETE statements. A read-only result table must not be referred to in a Positioned UPDATE or DELETE statement, whether it is read-only by nature or specified as FOR READ ONLY (FOR FETCH ONLY). The aforementioned improvement can be achieved by applying "FOR READ ONLY" when other locking hints are not specified. Patch to be uploaded soon. -- 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, 11 months

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[Hibernate-JIRA] Created: (HHH-3495) CollectionAction instances can consume considerable memory in large transactions unnecessarily

by Tim Downey (JIRA)

CollectionAction instances can consume considerable memory in large transactions unnecessarily ---------------------------------------------------------------------------------------------- Key: HHH-3495 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3495 Project: Hibernate Core Issue Type: Improvement Reporter: Tim Downey Attachments: CollectionActionPatch.zip Hi, We're doing some fairly heavy duty batch processing using Hibernate 3.3.1. In doing so, we're basically paging over large chunks of entities where we flush and clear the session around pages. We do not commit between pages. We may be processing hundreds of thousands of entities over pages of ten to twenty thousand each. We're clearing the session around pages in attempt to free up memory that is no longer necessary. We have found that subtypes of CollectionAction get added to a list of Executable in the ActionQueue when there are collection changes processed. These CollectionActions are held until transaction complete and are not released on flush or clear of the session. Furthermore, the CollectionAction instances hold references to those collections that have changed even after the entities have been evicted from the session. In our case, this was causing Hibernation to hold on to several hundred MB of RAM until transaction commit. I've supplied a small patch that doesn't require the CollectionAction to hang on to the entities themselves until the transaction boundary. We're showing considerably improvement in memory utilization as a result. I'm hoping that you consider this patch for inclusion in a future release. The change was basically to change the ActionQueue's list of Executables used in after transaction completion, to a separate type, AfterTransactionCompletionExecutable. This new type allows some decoupling in the other subclasses of Executable to hold references to fewer resources and save considerable memory when the transaction sizes are quite large. Regards, Tim -- 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

13 years

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[Hibernate-JIRA] Created: (HHH-2169) L2 Cache and Long transactions Memory Leak : OutOfMemoryException

by Sami Dalouche (JIRA)

L2 Cache and Long transactions Memory Leak : OutOfMemoryException ----------------------------------------------------------------- Key: HHH-2169 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2169 Project: Hibernate3 Type: Bug Components: core Versions: 3.2.0.ga Environment: [b]Hibernate version:[/b] Hibernate Entity Manager 3.2.0, with Hibernate Core 3.2.0 and Hibernate Annotations 3.2.0 [b]Mapping documents:[/b] Annotations [b]Full stack trace of any exception that occurs:[/b] Memory Heap Exception [b]Name and version of the database you are using:[/b] PosgreSQL 8.1 Reporter: Sami Dalouche Summary --------- When enabling L2 Cache (with either OScache and EhCache, both with a limitation on the max #of instances, so the problem shouldn't come from the cache manager), Hibernate cannot have long running transactions, otherwise, it results in a Memory Heap Exception... The problem does NOT happen if the L2 Cache is disabled ! Details ---------- - Configure the code to run in ONE transaction - Have a huge loop that inserts 2 million entries that are cacheable (@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)) - flush() and clear() every 1000 entries, to periodically flush the cache => None of the entries are garbage collected. => Using a profiler, it is possible to trace the owning objects of my domain classes to : - org.hibernate.action.EntityInsertAction ("instance" variable) - array / List (variable elementData) - variable "executions" in object .. class org.hibernate.engine.ActionQueue Remarks : - If the Query Cache is disabled, and the objects being inserted are NOT cacheable (no @Cache annotation), there is no problem - If the Query Cache is enabled, then, no matter whether the objects being inserted are cacheable or not, The entries are never garbage collected, and I get an OutOfMemoryException. (I see NO relationship between the Query Cache and my objects. I never query the objects, only save them !!) -- 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

13 years

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[Hibernate-JIRA] Created: (HHH-3195) session.clear() is not effective when use_query_cache is true

by James Berry (JIRA)

session.clear() is not effective when use_query_cache is true ------------------------------------------------------------- Key: HHH-3195 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3195 Project: Hibernate3 Issue Type: Bug Affects Versions: 3.2.6 Environment: 3.2.6.ga, MySQL5 Reporter: James Berry As discussed in detail in http://forum.hibernate.org/viewtopic.php?t=944918, performing many inserts while use_query_cache is enabled will eventually cause an out of memory condition, even if the session is periodically flushed and cleared. That forum thread describes a potential root cause for this problem. Nobody from the Hibernate team has responded regarding the forum thread, even though it's been alive for three years now! Note that an answer to "disable the query cache" is not a good solution to the problem, as we need the query cache elsewhere. If it were possible to disable the query cache for a particular session, that would be fine, but I see no way do that. -- 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

13 years

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hibernate-issues October 2008