We found the following exception in the logs (I think this may be side
effect to the negative count though):
[3/8/10 12:17:19:528 EET] 0000007b ShrinkerThrea I
org.apache.commons.logging.impl.Jdk14Logger info Unexpected trouble in
shrink cycle
java.lang.NegativeArraySizeException
at
java.util.AbstractCollection.toArray(AbstractCollection.java:138)
at
java.util.Collections$SynchronizedCollection.toArray(Collections.java:15
85)
at
org.apache.jcs.engine.memory.AbstractDoulbeLinkedListMemoryCache.getKeyA
rray(AbstractDoulbeLinkedListMemoryCache.java:696)
at
org.apache.jcs.engine.memory.shrinking.ShrinkerThread.shrink(ShrinkerThr
ead.java:125)
at
org.apache.jcs.engine.memory.shrinking.ShrinkerThread.run(ShrinkerThread
.java:95)
at
EDU.oswego.cs.dl.util.concurrent.ClockDaemon$RunLoop.run(Unknown Source)
at java.lang.Thread.run(Thread.java:797)
Jvm info: Java version = 1.5.0, Java Compiler = j9jit23, Java VM name =
IBM J9 VM
Here's additional information:
The AIX version is "6100-02" (6.1.2.6 with service pack 6)
The WAS version "6.1.0.21"
JCS tested is 1.3.3.5-RC and also latest from SVN trunk.
Image of JCS.jsp showing negative item count.
http://imgur.com/jmikz.png
ccf file contents.
##################################################################
# Default settings
# http://jakarta.apache.org/jcs/index.html
# http://www.jroller.com/page/aspinei/?anchor=jcs_the_good_the_bad
##################################################################
jcs.default=DC
# cache compression
# 0 - OFF
# 1 - Best performance
# 9 - Best compression
interwoven.cachemanager.compression=0
# mem cache settings
jcs.default.cacheattributes=org.apache.jcs.engine.CompositeCacheAttribut
es
jcs.default.cacheattributes.MemoryCacheName=org.apache.jcs.engine.memory
.lru.LRUMemoryCache
jcs.default.cacheattributes.UseMemoryShrinker=true
jcs.default.cacheattributes.ShrinkerIntervalSeconds=300
jcs.default.cacheattributes.MaxSpoolPerRun=64
# element attributes
jcs.default.elementattributes=org.apache.jcs.engine.ElementAttributes
jcs.default.elementattributes.MaxLifeSeconds=-1
jcs.default.elementattributes.IdleTime=-1
jcs.default.elementattributes.IsEternal=true
jcs.default.elementattributes.IsSpool=true
jcs.default.elementattributes.IsRemote=false
jcs.default.elementattributes.IsLateral=false
##################################################################
# Page settings
##################################################################
jcs.region.page=DC
jcs.region.page.cacheattributes.MaxObjects=128
##################################################################
# Component settings
##################################################################
jcs.region.component=DC
jcs.region.component.cacheattributes.MaxObjects=256
##################################################################
# Stylesheet settings (NOTE: NO disk region, this cache is memory only)
##################################################################
jcs.region.stylesheet=
jcs.region.stylesheet.cacheattributes.MaxObjects=128
jcs.region.stylesheet.elementattributes.IsSpool=false
##################################################################
# Rules settings (NOTE: NO disk region, this cache is memory only)
##################################################################
jcs.region.rulesenginevalues=
jcs.region.rulesenginevalues.cacheattributes.MaxObjects=512
jcs.region.rulesenginevalues.elementattributes.IsSpool=false
##################################################################
# disk cache attribs [Indexed Disk Cache]
# some cache corruptions taking place with this cache
##################################################################
jcs.auxiliary.DC=org.apache.jcs.auxiliary.disk.indexed.IndexedDiskCacheF
actory
jcs.auxiliary.DC.attributes=org.apache.jcs.auxiliary.disk.indexed.Indexe
dDiskCacheAttributes
jcs.auxiliary.DC.attributes.MaxPurgatorySize=1024
jcs.auxiliary.DC.attributes.MaxKeySize=10240
jcs.auxiliary.DC.attributes.OptimizeAtRemoveCount=1024
jcs.auxiliary.DC.attributes.OptimizeOnShutdown=true
jcs.auxiliary.DC.attributes.MaxRecycleBinSize=10240
-----Original Message-----
From: Tim Cronin [mailto:[email protected]]
Sent: Thursday, March 04, 2010 12:46 PM
To: JCS Users List
Subject: cache counts going negative.
We have a web application running in webshpere on AIX and for one of the
LRU mem caches the cache count on the JCS admin page shows negative
values (See attached)...
We're running jcs 1.3.
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