[JBoss Cache: Core Edition] - 2 node in cluster being stuck when GC runs due to JBC?
by jorgemoralespou_2
Hi,
We have a 2 node cluster. The only clustering is done through JBC, with configurations like the one below. We are seeing that when in one node there is a FullGC with a 10 seconds "Stop the world", requests in the other node get delayed by 10 seconds. Since we only have the cache shared between this 2 nodes, this has to be the cause.
Have anyone seen behaviour like this before? is it normal? how can I avoid it?
| <mbean code="com.mycompany.som.cache.core.mbean.CoreCacheWithListener"
| name="jboss.cache:service=SOMCoreCache">
|
| <depends>jboss:service=Naming</depends>
| <depends>jboss:service=TransactionManager</depends>
| <depends>jboss.jca:name=jdbc/som,service=DataSourceBinding</depends>
|
| <depends>jboss:service=DeploymentService</depends>
|
| <attribute name="TransactionManagerLookupClass">
| org.jboss.cache.JBossTransactionManagerLookup
| </attribute>
|
| <attribute name="IsolationLevel">NONE</attribute>
| <attribute name="CacheMode">REPL_SYNC</attribute>
| <attribute name="UseReplQueue">false</attribute>
| <attribute name="ReplQueueInterval">0</attribute>
| <attribute name="ReplQueueMaxElements">0</attribute>
| <attribute name="ClusterName">SOMCoreCache-Cluster</attribute>
|
| <attribute name="ClusterConfig">
| <config>
| <!-- UDP: if you have a multihomed machine,
| set the bind_addr attribute to the appropriate NIC IP address, e.g bind_addr="192.168.0.2"
| -->
| <!-- UDP: On Windows machines, because of the media sense feature
| being broken with multicast (even after disabling media sense)
| set the loopback attribute to true -->
| <UDP mcast_addr="${jboss.cache.SOMCoreCache.addr:228.1.2.3}"
| mcast_port="${jboss.cache.SOMCoreCache.port:48866}" ip_ttl="64"
| ip_mcast="true" mcast_send_buf_size="150000"
| mcast_recv_buf_size="80000" ucast_send_buf_size="150000"
| ucast_recv_buf_size="80000" loopback="false" />
| <PING timeout="2000" num_initial_members="3" up_thread="false"
| down_thread="false" />
| <MERGE2 min_interval="10000" max_interval="20000" />
| <!-- <FD shun="true" up_thread="true" down_thread="true" />-->
| <FD_SOCK />
| <VERIFY_SUSPECT timeout="1500" up_thread="false"
| down_thread="false" />
| <pbcast.NAKACK gc_lag="50" retransmit_timeout="600,1200,2400,4800"
| max_xmit_size="8192" up_thread="false" down_thread="false" />
| <UNICAST timeout="600,1200,2400" down_thread="false" />
| <pbcast.STABLE desired_avg_gossip="20000" up_thread="false"
| down_thread="false" />
| <FRAG frag_size="8192" down_thread="false" up_thread="false" />
| <pbcast.GMS join_timeout="5000" join_retry_timeout="2000"
| shun="true" print_local_addr="true" />
| <pbcast.STATE_TRANSFER up_thread="true" down_thread="true" />
| </config>
| </attribute>
|
| <attribute name="FetchInMemoryState">true</attribute>
| <attribute name="InitialStateRetrievalTimeout">15000</attribute>
| <attribute name="SyncReplTimeout">15000</attribute>
| <attribute name="LockAcquisitionTimeout">10000</attribute>
| <attribute name="UseRegionBasedMarshalling">true</attribute>
| <attribute name="InactiveOnStartup">false</attribute>
|
| <attribute name="CacheLoaderConfiguration">
| <config>
| <passivation>false</passivation>
| <preload>/</preload>
| <shared>true</shared>
| <cacheloader>
| <class>org.jboss.cache.loader.JDBCCacheLoader</class>
| <properties>
| cache.jdbc.datasource=java:jdbc/som
| cache.jdbc.table.name=core_data
| cache.jdbc.table.create=true
| cache.jdbc.table.drop=false
| cache.jdbc.table.primarykey=jbosscache_pk
| cache.jdbc.fqn.column=fqn
| cache.jdbc.fqn.type=varchar(255)
| cache.jdbc.node.column=node
| cache.jdbc.node.type=blob
| cache.jdbc.parent.column=parent
| </properties>
| <async>true</async>
| <fetchPersistentState>true</fetchPersistentState>
| <ignoreModifications>false</ignoreModifications>
| </cacheloader>
| </config>
| </attribute>
|
| </mbean>
| </server>
|
|
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18 years
[JBoss jBPM] - problem with action and variables
by ice_casa
My problem is :
i had a variable as this :
<variable access="read,write" name="varGroup"></variable>
and and action that set a value of this variable
| public class UserOfGroupActionHandler implements ActionHandler {
| public static String actors = "";
| public void execute(ExecutionContext executionContext) {
| ...
| ..
| .
| executionContext.setVariable("varGroup", actors);
| }
|
in my process definition a have this :
| <event type="task-assign">
| <action class='com.action.UserOfGroupActionHandler' />
|
| <mail name="demande-notif" actors="#{varGroup}" >
|
in my logging appserver i understand that the action don t call the class and the group are not evaluated!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
thank you for your help
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18 years