Rupert Westenthaler created STANBOL-1443:
--------------------------------------------
Summary: FastLRUCacheManager of the FST Linking Engine is not
thread save
Key: STANBOL-1443
URL: https://issues.apache.org/jira/browse/STANBOL-1443
Project: Stanbol
Issue Type: Bug
Components: Enhancement Engines
Affects Versions: 0.12.0
Reporter: Rupert Westenthaler
Assignee: Rupert Westenthaler
Fix For: 1.0.0, 0.12.1
The {{FastLRUCacheManager}} is the implementation of the
{{EntityCacheManager}}. The EntityCacheManager interface uses the
{{o.a.solr.util.RefCounted}} for getting the EntityCache object.
However the management of the RefCount of the {{FastLRUCacheManager}}
implementation is not thread save. So under high load the actual ref count can
get wrong values. Based on logs I observed negative values (resulting in close
operations in the Cache) and also very high values (potentially resulting in
Caches not being correctly garbage collected).
To fix this issue the {{FastLRUCacheManager.getCache(Object version)}} needs to
be implemented in a thread save manner. Also the {{#close()}} method needs to
be thread save.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
