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Posted to issues@commons.apache.org by "Thomas Vandahl (JIRA)" <ji...@apache.org> on 2012/11/10 17:43:13 UTC
[jira] [Resolved] (JCS-76) Exception when using the cache from
different threads (synchronization problems)
[ https://issues.apache.org/jira/browse/JCS-76?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Thomas Vandahl resolved JCS-76.
-------------------------------
Resolution: Duplicate
Fix Version/s: jcs-2.0.0
Would you please try out the latest trunk and report your findings.
> Exception when using the cache from different threads (synchronization problems)
> --------------------------------------------------------------------------------
>
> Key: JCS-76
> URL: https://issues.apache.org/jira/browse/JCS-76
> Project: Commons JCS
> Issue Type: Bug
> Components: Composite Cache
> Reporter: Alexander Sofronov
> Assignee: Thomas Vandahl
> Fix For: jcs-2.0.0
>
>
> Recently we switched our product into parallel mode, so now we are using JCS cache from different threads. And it looks like there are some problems with synchronization inside JCS, sometimes we are getting the following error:
> Caused by: java.lang.Error: update: last is null!
> at org.apache.jcs.engine.memory.AbstractDoulbeLinkedListMemoryCache.spoolLastElement(AbstractDoulbeLinkedListMemoryCache.java:280)
> at org.apache.jcs.engine.memory.AbstractDoulbeLinkedListMemoryCache.spoolIfNeeded(AbstractDoulbeLinkedListMemoryCache.java:154)
> at org.apache.jcs.engine.memory.AbstractDoulbeLinkedListMemoryCache.update(AbstractDoulbeLinkedListMemoryCache.java:106)
> at org.apache.jcs.engine.control.CompositeCache.copyAuxiliaryRetrievedItemToMemory(CompositeCache.java:993)
> at org.apache.jcs.engine.control.CompositeCache.get(CompositeCache.java:566)
> at org.apache.jcs.engine.control.CompositeCache.get(CompositeCache.java:429)
> at org.apache.jcs.access.CacheAccess.get(CacheAccess.java:192)
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