Hi, the configuration of me cluster CAS are two nodes behind a load
balancer. Dual CPU system, 6Gb RAM with Ubuntu 16.04, Tomcat8 with
java-8-openjdk.
Relevant Tomcat8 conf: -Xms512 -Xmx4096 -XX:+UseParallelGC
-XX:ParallelGCThreads=2 -XX:NewRatio=2
CAS 4.1.6 container have: LDAP conn, MySQL conn and EHCache. 60k of
users approx. Normally 15k of TGT live.
Relevant EHCache conf (two caches are Sync because i need instant
replication of PGT same as ST):
<bean id="abstractTicketCache" abstract="true"
class="org.springframework.cache.ehcache.EhCacheFactoryBean"
p:cacheManager-ref="cacheManager"
p:diskExpiryThreadIntervalSeconds="1"
p:diskPersistent="false"
p:eternal="false"
p:maxElementsInMemory="100000"
p:maxElementsOnDisk="110000"
p:memoryStoreEvictionPolicy="LRU"
p:overflowToDisk="true"
p:bootstrapCacheLoader-ref="ticketCacheBootstrapCacheLoader" />
<bean id="serviceTicketsCache"
class="org.springframework.cache.ehcache.EhCacheFactoryBean"
parent="abstractTicketCache"
p:cacheName="cas_st"
p:timeToIdle="0"
p:timeToLive="10"
p:cacheEventListeners-ref="ticketRMISynchronousCacheReplicator" />
<bean id="ticketGrantingTicketsCache"
class="org.springframework.cache.ehcache.EhCacheFactoryBean"
p:cacheName="cas_tgt"
parent="abstractTicketCache"
p:timeToIdle="14400"
p:timeToLive="43200"
p:cacheEventListeners-ref="ticketRMISynchronousCacheReplicator" />
<bean id="ticketRMISynchronousCacheReplicator"
class="net.sf.ehcache.distribution.RMISynchronousCacheReplicator"
c:replicatePuts="true"
c:replicatePutsViaCopy="true"
c:replicateUpdates="true"
c:replicateUpdatesViaCopy="true"
c:replicateRemovals="true" />
<bean id="ticketRMIAsynchronousCacheReplicator"
class="net.sf.ehcache.distribution.RMIAsynchronousCacheReplicator"
parent="ticketRMISynchronousCacheReplicator"
c:replicationInterval="10000"
c:maximumBatchSize="100" />
<bean id="ticketCacheBootstrapCacheLoader"
class="net.sf.ehcache.distribution.RMIBootstrapCacheLoader"
c:asynchronous="false"
c:maximumChunkSize="5000000" />
The system working normaly with JMX Memory avg 1.8Gb, but after a while
undetermined (24h, 48h, 72h ...) the JMX DaemonThreads grow (between
100k and 200k) saturating the memory and hangs CAS container.
Any idea about the behaviour or where I can investigate to debug the error.
Thanks for all.
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