2:43 a.m.
I have configured two weblogic admin servers on the same machine. A sample application
(the one posted on JBoss site, JBoss and Weblogic) using JBossCache is deployed on both
these app servers. When Buddy replication is not configured, the contents are replicated.
But when buddy replication is enabled at that time, contents are not replicated
immediately and there is no specific time interval observed when contents are replicated.
If I access application-1 on admin server and put something into cache and then try to
view the cache contents from application-2 on other admin server, they are not reflected
there.
Please find the configuration file that I am using. Another thing I observed is I get
following error on application startup
===================
===================2007-04-23 12:11:49,143 ERROR
[org.jboss.cache.transaction.DummyTransactionManager] ([ACTIVE] ExecuteThread: '2'
for queue: 'weblogic.kernel.Default (self-tuning)') binding of
DummyTransactionManager failed
| javax.naming.OperationNotSupportedException: bind not allowed in a ReadOnlyContext;
remaining name '/TransactionManager'
| at
weblogic.jndi.factories.java.ReadOnlyContextWrapper.newOperationNotSupportedException(ReadOnlyContextWrapper.java:145)
| at
weblogic.jndi.factories.java.ReadOnlyContextWrapper.newOperationNotSupportedException(ReadOnlyContextWrapper.java:161)
| at
weblogic.jndi.factories.java.ReadOnlyContextWrapper.bind(ReadOnlyContextWrapper.java:57)
| at weblogic.jndi.internal.AbstractURLContext.bind(AbstractURLContext.java:45)
| at javax.naming.InitialContext.bind(InitialContext.java:359)
| at
org.jboss.cache.transaction.DummyTransactionManager.getInstance(DummyTransactionManager.java:33)
| at
org.jboss.cache.DummyTransactionManagerLookup.getTransactionManager(DummyTransactionManagerLookup.java:17)
| at org.jboss.cache.TreeCache._createService(TreeCache.java:1393)
| at org.jboss.cache.TreeCache.createService(TreeCache.java:1378)
| at
org.jboss.cache.example.j2eeservices.JBossCacheManager.main(JBossCacheManager.java:74)
| at org.jboss.cache.example.servlet.CacheServlet.init(CacheServlet.java:29)
| at javax.servlet.GenericServlet.init(GenericServlet.java:256)
| at
weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:276)
| at
weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
| at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
| at
weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:68)
| at
weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58)
| at
weblogic.servlet.internal.StubLifecycleHelper.<init>(StubLifecycleHelper.java:48)
| at
weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:504)
| at
weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:1698)
| at
weblogic.servlet.internal.WebAppServletContext.loadServletsOnStartup(WebAppServletContext.java:1675)
| at
weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1595)
| at
weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:2734)
| at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:892)
| at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:336)
| at
weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204)
| at
weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
| at
weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
| at
weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200)
| at
weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:117)
| at
weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204)
| at
weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
| at
weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
| at
weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:26)
| at weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:641)
| at
weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
| at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:229)
| at
weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:154)
| at
weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:80)
| at
weblogic.deploy.internal.targetserver.BasicDeployment.activate(BasicDeployment.java:181)
| at
weblogic.deploy.internal.targetserver.BasicDeployment.activateFromServerLifecycle(BasicDeployment.java:352)
| at
weblogic.management.deploy.internal.DeploymentAdapter$1.doActivate(DeploymentAdapter.java:52)
| at
weblogic.management.deploy.internal.DeploymentAdapter.activate(DeploymentAdapter.java:186)
| at
weblogic.management.deploy.internal.AppTransition$2.transitionApp(AppTransition.java:30)
| at
weblogic.management.deploy.internal.ConfiguredDeployments.transitionApps(ConfiguredDeployments.java:233)
| at
weblogic.management.deploy.internal.ConfiguredDeployments.activate(ConfiguredDeployments.java:169)
| at
weblogic.management.deploy.internal.ConfiguredDeployments.deploy(ConfiguredDeployments.java:123)
| at
weblogic.management.deploy.internal.DeploymentServerService.resume(DeploymentServerService.java:173)
| at
weblogic.management.deploy.internal.DeploymentServerService.start(DeploymentServerService.java:89)
| at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64)
| at
weblogic.work.ServerWorkManagerImpl$WorkAdapterImpl.run(ServerWorkManagerImpl.java:518)
| at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
| at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)
| 2007-04-23 12:11:49,173 DEBUG [org.jboss.cache.TreeCache] ([ACTIVE] ExecuteThread:
'2' for queue: 'weblogic.kernel.Default (self-tuning)') Not using an
EvictionPolicy
|
| ======================
|
| Please find the attached configuration file used for cache configuration of
application-1 and application-2.
|
| ------------------------------------------------------------------
|
| <?xml version="1.0" encoding="UTF-8"?>
|
| <!-- ===================================================================== -->
| <!-- -->
| <!-- Sample TreeCache Service Configuration -->
| <!-- -->
| <!-- ===================================================================== -->
|
| <server>
|
| <classpath codebase="./lib" archives="jboss-cache.jar,
jgroups.jar"/>
|
|
| <!-- ====================================================================
-->
| <!-- Defines TreeCache configuration
-->
| <!-- ====================================================================
-->
|
| <mbean code="org.jboss.cache.TreeCache"
| name="jboss.cache:service=TreeCache">
|
| <depends>jboss:service=Naming</depends>
| <depends>jboss:service=TransactionManager</depends>
|
| <!--
| Configure the TransactionManager
| -->
| <attribute
name="TransactionManagerLookupClass">org.jboss.cache.DummyTransactionManagerLookup</attribute>
|
| <!--
| Isolation level : SERIALIZABLE
| REPEATABLE_READ (default)
| READ_COMMITTED
| READ_UNCOMMITTED
| NONE
| -->
| <attribute
name="IsolationLevel">REPEATABLE_READ</attribute>
|
| <!--
| Valid modes are LOCAL, REPL_ASYNC and REPL_SYNC
| -->
| <attribute name="CacheMode">REPL_SYNC</attribute>
|
| <!--
| Just used for async repl: use a replication queue
| -->
| <attribute name="UseReplQueue">false</attribute>
|
| <!--
| Replication interval for replication queue (in ms)
| -->
| <attribute name="ReplQueueInterval">0</attribute>
|
| <!--
| Max number of elements which trigger replication
| -->
| <attribute name="ReplQueueMaxElements">0</attribute>
|
| <!-- Name of cluster. Needs to be the same for all clusters, in order
| to find each other
| -->
| <attribute
name="ClusterName">TreeCache-Cluster</attribute>
|
| <!-- JGroups protocol stack properties. Can also be a URL,
| e.g. file:/home/bela/default.xml
| <attribute name="ClusterProperties"></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="224.10.10.10"
mcast_port="45566"
| 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" bind_addr="127.0.0.1"/>
| <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"
window_size="100" min_threshold="10"
| 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>
|
|
| <!--
| Whether or not to fetch state on joining a cluster
| -->
| <attribute name="FetchStateOnStartup">true</attribute>
|
| <!--
| The max amount of time (in milliseconds) we wait until the
| initial state (ie. the contents of the cache) are retrieved from
| existing members in a clustered environment
| -->
| <attribute
name="InitialStateRetrievalTimeout">15000</attribute>
|
| <!--
| Number of milliseconds to wait until all responses for a
| synchronous call have been received.
| -->
| <attribute name="SyncReplTimeout">10000</attribute>
|
| <!-- Max number of milliseconds to wait for a lock acquisition -->
| <attribute
name="LockAcquisitionTimeout">15000</attribute>
|
| <!-- Name of the eviction policy class. Not supported now. -->
| <attribute name="EvictionPolicyClass"></attribute>
|
|
| <!-- Added for Buddy Replication -->
|
| <!-- Buddy Replication config -->
| <attribute name="BuddyReplicationConfig">
| <config>
| <!-- Enables buddy replication. This is the ONLY mandatory configuration element
here. -->
| <buddyReplicationEnabled>true</buddyReplicationEnabled>
| <!-- These are the default values anyway -->
|
<buddyLocatorClass>org.jboss.cache.buddyreplication.NextMemberBuddyLocator</buddyLocatorClass>
| <!-- numBuddies is the number of backup nodes each node maintains.
ignoreColocatedBuddies means that
| each node will *try* to select a buddy on a different physical host. If
not able to do so though,
| it will fall back to colocated nodes. -->
| <buddyLocatorProperties>
| numBuddies = 1
| ignoreColocatedBuddies = false
| </buddyLocatorProperties>
|
| <!-- A way to specify a preferred replication group. If specified, we try and
pick a buddy why shares
| the same pool name (falling back to other buddies if not available).
This allows the sysdmin to hint at
| backup buddies are picked, so for example, nodes may be hinted topick
buddies on a different physical rack
| or power supply for added fault tolerance. -->
| <buddyPoolName>myBuddyPoolReplicationGroup</buddyPoolName>
| <!-- Communication timeout for inter-buddy group organisation messages
(such as assigning to and removing
| from groups, defaults to 1000. -->
| <buddyCommunicationTimeout>2000</buddyCommunicationTimeout>
| <!-- Whether data is removed from old owners when gravitated to a new
owner. Defaults to true. -->
| <dataGravitationRemoveOnFind>true</dataGravitationRemoveOnFind>
| <!-- Whether backup nodes can respond to data gravitation requests, or only
the data owner is supposed to respond.
| defaults to true. -->
|
<dataGravitationSearchBackupTrees>true</dataGravitationSearchBackupTrees>
| <!-- Whether all cache misses result in a data gravitation request. Defaults to
false, requiring callers to
| enable data gravitation on a per-invocation basis using the Options API.
-->
| <autoDataGravitation>false</autoDataGravitation>
| </config>
| </attribute>
|
|
|
| <!--
| <attribute
name="CacheLoaderClass">org.jboss.cache.loader.bdbje.BdbjeCacheLoader</attribute>
| <attribute
name="CacheLoaderConfig">c:\tmp\bdbje</attribute>
| <attribute name="CacheLoaderShared">true</attribute>
| <attribute name="CacheLoaderPreload">/</attribute>
| -->
|
| <!--
| <attribute
name="CacheLoaderClass">org.jboss.cache.loader.FileCacheLoader</attribute>
| <attribute name="CacheLoaderConfig">/tmp</attribute>
| <attribute name="CacheLoaderShared">true</attribute>
| <attribute name="CacheLoaderPreload">/</attribute>
| -->
|
|
| </mbean>
|
|
| <!-- Uncomment to get a graphical view of the TreeCache MBean above -->
| <!-- <mbean code="org.jboss.cache.TreeCacheView"
name="jboss.cache:service=TreeCacheView">-->
| <!-- <depends>jboss.cache:service=TreeCache</depends>-->
| <!-- <attribute
name="CacheService">jboss.cache:service=TreeCache</attribute>-->
| <!-- </mbean>-->
|
|
| </server>
|
|
| ------------------------------------------------------------------
|
|
| I also tried to increase "BuddyCommunicationTimeout" but it did not work.
Please advice.
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