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Posted to dev@jackrabbit.apache.org by "angela (JIRA)" <ji...@apache.org> on 2011/04/28 10:34:03 UTC
[jira] [Assigned] (JCR-2950) Performance bottleneck: cache of
CachingEntryCollector ineffective in case many ACEs are present
[ https://issues.apache.org/jira/browse/JCR-2950?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
angela reassigned JCR-2950:
---------------------------
Assignee: angela
> Performance bottleneck: cache of CachingEntryCollector ineffective in case many ACEs are present
> ------------------------------------------------------------------------------------------------
>
> Key: JCR-2950
> URL: https://issues.apache.org/jira/browse/JCR-2950
> Project: Jackrabbit Content Repository
> Issue Type: Improvement
> Components: jackrabbit-core, security
> Affects Versions: 2.2.4
> Environment: Repository with ACEs > 1000
> Reporter: Honwai Wong
> Assignee: angela
>
> The CachingEntryCollector's cache (LRUMap, max size: 1000) seems to become ineffective in case there are more than 1000 ACEs present in the repository. Since access to the cache is synchronized, many threads are basically blocked, waiting to get access to the cache.
> Java callstack:
> at org/apache/jackrabbit/core/security/authorization/acl/CachingEntryCollector.getEntries(CachingEntryCollector.java:99(Compiled Code))
> at org/apache/jackrabbit/core/security/authorization/acl/EntryCollector.collectEntries(EntryCollector.java:134(Compiled Code))
> at org/apache/jackrabbit/core/security/authorization/acl/CompiledPermissionsImpl.canRead(CompiledPermissionsImpl.java:250(Compiled Code))
> at org/apache/jackrabbit/core/security/DefaultAccessManager.canRead(DefaultAccessManager.java:251(Compiled Code))
> at org/apache/jackrabbit/core/ItemManager.canRead(ItemManager.java:426(Compiled Code))
> at org/apache/jackrabbit/core/ItemManager.createItemData(ItemManager.java(Compiled Code))
> at org/apache/jackrabbit/core/ItemManager.getItemData(ItemManager.java:379(Compiled Code))
> at org/apache/jackrabbit/core/ItemManager.itemExists(ItemManager.java:292(Compiled Code))
> at org/apache/jackrabbit/core/ItemManager.itemExists(ItemManager.java:464(Compiled Code))
> at org/apache/jackrabbit/core/session/SessionItemOperation$1.perform(SessionItemOperation.java:49(Compiled Code))
> at org/apache/jackrabbit/core/session/SessionItemOperation$1.perform(SessionItemOperation.java:46(Compiled Code))
> at org/apache/jackrabbit/core/session/SessionItemOperation.perform(SessionItemOperation.java:187(Compiled Code))
> at org/apache/jackrabbit/core/session/SessionState.perform(SessionState.java:200(Compiled Code))
> at org/apache/jackrabbit/core/SessionImpl.perform(SessionImpl.java:355(Compiled Code))
> at org/apache/jackrabbit/core/SessionImpl.itemExists(SessionImpl.java:751(Compiled Code))
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