[JBoss JIRA] Created: (MODCLUSTER-100) load balancing logic doesn't allow manual demo of load-balancing
by Jean-Frederic Clere (JIRA)
load balancing logic doesn't allow manual demo of load-balancing
----------------------------------------------------------------
Key: MODCLUSTER-100
URL: https://jira.jboss.org/jira/browse/MODCLUSTER-100
Project: mod_cluster
Issue Type: Feature Request
Environment: any
Reporter: Jean-Frederic Clere
Assignee: Jean-Frederic Clere
the load-balancing logic counts the requests during a while and uses that counter to balance the requests between the nodes.
the while is 1 second fixed.... Should be a parameter and probably the default value should be more than one second.
The actual ormula is:
status = lbstatus + (elected - oldelected) * 1000)/bfactor;
lbfactor is received for the node via STATUS.
lbstatus is recalculated every 1 second (that will be a parameter) like status.
elected is the number of time the worker was elected.
oldelected is elected last time the lbstatus was recalculated.
The node with the lowest status is selected.
If you have very few sessions (like a demo by hands) lbstatus is 0 on all the nodes and only the first nodes are going to be selected.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
14 years, 8 months
[JBoss JIRA] Created: (MODCLUSTER-88) ClassCastException upon redeploy after mod-cluster-jboss-beans.xml modification
by Paul Ferraro (JIRA)
ClassCastException upon redeploy after mod-cluster-jboss-beans.xml modification
-------------------------------------------------------------------------------
Key: MODCLUSTER-88
URL: https://jira.jboss.org/jira/browse/MODCLUSTER-88
Project: mod_cluster
Issue Type: Bug
Affects Versions: 1.0.1.GA
Reporter: Paul Ferraro
Assignee: Paul Ferraro
Looks like a classloader problem.
2009-07-31 09:52:40,084 INFO
[org.jboss.web.tomcat.service.deployers.TomcatDeployment] (HDScanner)
undeploy, ctxPath=/invoker
2009-07-31 09:52:40,168 INFO
[org.jboss.web.tomcat.service.deployers.TomcatDeployment] (HDScanner)
undeploy, ctxPath=/juddi
2009-07-31 09:52:40,170 INFO
[org.apache.juddi.registry.RegistryServlet] (HDScanner) jUDDI Stopping:
Cleaning up existing resources.
2009-07-31 09:52:40,172 INFO
[org.jboss.web.tomcat.service.deployers.TomcatDeployment] (HDScanner)
undeploy, ctxPath=/jbossws
2009-07-31 09:52:40,176 INFO
[org.jboss.web.tomcat.service.deployers.TomcatDeployment] (HDScanner)
undeploy, ctxPath=/web-console
2009-07-31 09:52:40,182 INFO
[org.jboss.web.tomcat.service.deployers.TomcatDeployment] (HDScanner)
undeploy, ctxPath=/admin-console
2009-07-31 09:52:40,186 INFO
[org.jboss.web.tomcat.service.deployers.TomcatDeployment] (HDScanner)
undeploy, ctxPath=/jmx-console
2009-07-31 09:52:40,225 INFO [org.apache.coyote.http11.Http11Protocol]
(HDScanner) Pausing Coyote HTTP/1.1 on http-10.254.203.178-8080
2009-07-31 09:52:40,230 INFO [org.apache.coyote.http11.Http11Protocol]
(HDScanner) Stopping Coyote HTTP/1.1 on http-10.254.203.178-8080
2009-07-31 09:52:40,231 INFO [org.apache.coyote.ajp.AjpProtocol]
(HDScanner) Pausing Coyote AJP/1.3 on ajp-10.254.203.178-8009
2009-07-31 09:52:40,236 INFO [org.apache.coyote.ajp.AjpProtocol]
(HDScanner) Stopping Coyote AJP/1.3 on ajp-10.254.203.178-8009
2009-07-31 09:52:40,292 INFO [org.apache.catalina.core.StandardService]
(HDScanner) Stopping service jboss.web
2009-07-31 09:52:41,506 ERROR
[org.jboss.kernel.plugins.dependency.AbstractKernelController]
(HDScanner) Error installing to Start: name=HAModClusterService
state=Create mode=On Demand requiredState=Installed
java.lang.ClassCastException:
org.jboss.modcluster.ha.ModClusterServiceDRMEntry cannot be cast to
org.jboss.modcluster.ha.ModClusterServiceDRMEntry
at
org.jboss.modcluster.ha.HAModClusterService.narrowCandidateList(HAModClusterService.java:496)
at
org.jboss.modcluster.ha.HAModClusterService.getElectionCandidates(HAModClusterService.java:477)
at
org.jboss.ha.framework.server.HASingletonImpl.election(HASingletonImpl.java:206)
at
org.jboss.ha.framework.server.HASingletonImpl.elected(HASingletonImpl.java:199)
at
org.jboss.ha.framework.server.HASingletonImpl.partitionTopologyChanged(HASingletonImpl.java:162)
at
org.jboss.ha.framework.server.HASingletonImpl.registerDRMListener(HASingletonImpl.java:124)
at
org.jboss.ha.framework.server.HAServiceImpl.start(HAServiceImpl.java:180)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at
org.jboss.reflect.plugins.introspection.ReflectionUtils.invoke(ReflectionUtils.java:59)
at
org.jboss.reflect.plugins.introspection.ReflectMethodInfoImpl.invoke(ReflectMethodInfoImpl.java:150)
at
org.jboss.joinpoint.plugins.BasicMethodJoinPoint.dispatch(BasicMethodJoinPoint.java:66)
at
org.jboss.kernel.plugins.dependency.KernelControllerContextAction$JoinpointDispatchWrapper.execute(KernelControllerContextAction.java:241)
at
org.jboss.kernel.plugins.dependency.ExecutionWrapper.execute(ExecutionWrapper.java:47)
at
org.jboss.kernel.plugins.dependency.KernelControllerContextAction.dispatchExecutionWrapper(KernelControllerContextAction.java:109)
at
org.jboss.kernel.plugins.dependency.KernelControllerContextAction.dispatchJoinPoint(KernelControllerContextAction.java:70)
at
org.jboss.kernel.plugins.dependency.LifecycleAction.installActionInternal(LifecycleAction.java:221)
at
org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:54)
at
org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:42)
at
org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62)
at
org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71)
at
org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51)
at
org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
at
org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
at
org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
at
org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
at
org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
at
org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
at
org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
at
org.jboss.system.ServiceController.doChange(ServiceController.java:688)
at
org.jboss.system.ServiceController.start(ServiceController.java:460)
at
org.jboss.system.microcontainer.jmx.ServiceControllerStartStopLifecycleCallback.install(ServiceControllerStartStopLifecycleCallback.java:44)
at sun.reflect.GeneratedMethodAccessor252.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at
org.jboss.reflect.plugins.introspection.ReflectionUtils.invoke(ReflectionUtils.java:59)
at
org.jboss.reflect.plugins.introspection.ReflectMethodInfoImpl.invoke(ReflectMethodInfoImpl.java:150)
at
org.jboss.joinpoint.plugins.BasicMethodJoinPoint.dispatch(BasicMethodJoinPoint.java:66)
at
org.jboss.beans.info.plugins.AbstractBeanInfo.invoke(AbstractBeanInfo.java:300)
at
org.jboss.kernel.plugins.dependency.AbstractKernelControllerContext.invoke(AbstractKernelControllerContext.java:286)
at
org.jboss.dependency.plugins.AbstractLifecycleCallbackItem.install(AbstractLifecycleCallbackItem.java:87)
at
org.jboss.dependency.plugins.AbstractController.handleLifecycleCallbacks(AbstractController.java:1568)
at
org.jboss.dependency.plugins.AbstractController.handleInstallLifecycleCallbacks(AbstractController.java:1533)
at
org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:943)
at
org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
at
org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
at
org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
at
org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
at
org.jboss.system.ServiceController.doChange(ServiceController.java:688)
at
org.jboss.system.ServiceController.start(ServiceController.java:460)
at
org.jboss.system.microcontainer.jmx.ServiceControllerStartStopLifecycleCallback.install(ServiceControllerStartStopLifecycleCallback.java:44)
at sun.reflect.GeneratedMethodAccessor252.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at
org.jboss.reflect.plugins.introspection.ReflectionUtils.invoke(ReflectionUtils.java:59)
at
org.jboss.reflect.plugins.introspection.ReflectMethodInfoImpl.invoke(ReflectMethodInfoImpl.java:150)
at
org.jboss.joinpoint.plugins.BasicMethodJoinPoint.dispatch(BasicMethodJoinPoint.java:66)
at
org.jboss.beans.info.plugins.AbstractBeanInfo.invoke(AbstractBeanInfo.java:300)
at
org.jboss.kernel.plugins.dependency.AbstractKernelControllerContext.invoke(AbstractKernelControllerContext.java:286)
at
org.jboss.dependency.plugins.AbstractLifecycleCallbackItem.install(AbstractLifecycleCallbackItem.java:87)
at
org.jboss.dependency.plugins.AbstractController.handleLifecycleCallbacks(AbstractController.java:1568)
at
org.jboss.dependency.plugins.AbstractController.handleInstallLifecycleCallbacks(AbstractController.java:1533)
at
org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:943)
at
org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
at
org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
at
org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:774)
at
org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:540)
at
org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:121)
at
org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:51)
at
org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:62)
at
org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50)
at
org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:171)
at
org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1439)
at
org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1157)
at
org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1178)
at
org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1098)
at
org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
at
org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
at
org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
at
org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
at
org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
at
org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
at
org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
at
org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:781)
at
org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:702)
at
org.jboss.system.server.profileservice.repository.MainDeployerAdapter.process(MainDeployerAdapter.java:117)
at
org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:362)
at
org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:255)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at
java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)
2009-07-31 09:52:41,530 WARN
[org.jboss.system.server.profileservice.hotdeploy.HDScanner] (HDScanner)
Failed to process changes
org.jboss.deployers.client.spi.IncompleteDeploymentException: Summary of
incomplete deployments (SEE PREVIOUS ERRORS FOR DETAILS):
DEPLOYMENTS IN ERROR:
Deployment "HAModClusterService" is in error due to the following
reason(s): java.lang.ClassCastException:
org.jboss.modcluster.ha.ModClusterServiceDRMEntry cannot be cast to
org.jboss.modcluster.ha.ModClusterServiceDRMEntry
at
org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:993)
at
org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:939)
at
org.jboss.deployers.plugins.main.MainDeployerImpl.checkComplete(MainDeployerImpl.java:873)
at
org.jboss.system.server.profileservice.repository.MainDeployerAdapter.checkComplete(MainDeployerAdapter.java:128)
at
org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:369)
at
org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:255)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at
java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
14 years, 8 months
[JBoss JIRA] Updated: (MODCLUSTER-66) HAModClusterService needs to handle cluster splits
by Paul Ferraro (JIRA)
[ https://jira.jboss.org/jira/browse/MODCLUSTER-66?page=com.atlassian.jira.... ]
Paul Ferraro updated MODCLUSTER-66:
-----------------------------------
Fix Version/s: 1.1.0.CR1
> HAModClusterService needs to handle cluster splits
> --------------------------------------------------
>
> Key: MODCLUSTER-66
> URL: https://jira.jboss.org/jira/browse/MODCLUSTER-66
> Project: mod_cluster
> Issue Type: Task
> Affects Versions: 1.0.0.Beta4
> Reporter: Brian Stansberry
> Assignee: Paul Ferraro
> Fix For: 1.1.0.CR1
>
>
> The case where a split of the JGroups group occurs but nodes are still able to contact the httpd servers needs to be handled. There is a brief discussion of this on https://www.jboss.org/community/docs/DOC-11431 under "Split-Brain Syndrome". Problem is split-brain will result in nodes removing each other from httpd, resulting in no nodes active.
> The wiki page describes a simple approach. A more complex approach would be to take a "primary partition" approach, whereby say an initial cluster of size n==6 {A, B, C, D, E, F} splits into two cluster {A, B, C, D} and { E, F}. To continue to handle requests a partition would need to have at least Math.floor((float) n / 2 + 1) members.
> What kind of approach is appropriate would probably depend on the deployed webapps and how they interact with the cluster. If there is no clustered state that can become inconsistent across the cluster split, the simple approach described on the wiki can work fine (an HAModClusterService master doesn't disable a node if httpd reports it is still available). If there is shared state that needs to remain consistent (e.g. a clustered Hibernate Second Level Cache) then primary partition works better.
> Most likely this overall problem will be resolved in stages, e.g. the simple approach from the wiki first.
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
14 years, 8 months