[infinispan-issues] [JBoss JIRA] (ISPN-8480) Data Inconsistency in case of Topology change in Infinispan Cluster

[Rohit Singh (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-8480?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rohit Singh updated ISPN-8480:
------------------------------
    Affects Version/s: 8.2.5.Final


> Data Inconsistency in case of Topology change in Infinispan Cluster
> -------------------------------------------------------------------
>
>                 Key: ISPN-8480
>                 URL: https://issues.jboss.org/browse/ISPN-8480
>             Project: Infinispan
>          Issue Type: Bug
>    Affects Versions: 8.2.5.Final
>            Reporter: Rohit Singh
>            Priority: Blocker
>              Labels: Infinispan
>
> {color:red}*Data Inconsistency in case of Topology change in Infinispan Cluster*{color}
> *Infinispan Version : 8.2.5
> Hibernate Version : 5.2.8
> JGROUPS Version : 3.6.7
> *
> *Clustering Mode : Replication*
> We have tested the same with invalidation mode too.
> Refer below config cache-config for hibernate L2 entity types:
> _<replicated-cache-configuration name="entity" mode="SYNC" remote-timeout="20000" statistics="false" statistics-available="false">
>                                 <state-transfer  enabled="false" timeout="20000000"/>
>          <locking isolation="READ_COMMITTED" concurrency-level="1000" acquire-timeout="15000" striping="false"/>
>          <transaction mode="NONE" auto-commit="false" locking="OPTIMISTIC"/>
>                                 <eviction size="-1" strategy="NONE"/>
>          <expiration max-idle="-1" interval="5000" lifespan="-1" />
>       </replicated-cache-configuration>
> _
>                   
> When a disconnected node rejoins the cluster, data remains inconsistent on the reconnected node.
> *This is happening for both Hibernate L2 Cache and some custom cache (AdvancedCache).*
> The below 4 scenarios should explain the issue.
> *For Example:
>                 Scenario (Issue) 1:*
>                 -Initially the cluster comprises of 4 nodes, namely {A,B,C,D}.
>                 -Somehow, node D gets removed from the cluster view.
>                 -Then some updates/inserts in hibernate L2 cache is done on Node B.
>                 -These updates/inserts gets propagated to all the nodes in the current cluster view, i.e. {A,B,C}.
>                 -And these updates/inserts doesn't get propagated to the Node D.
>                 -Now D has stale state of the L2 cache.
>                 -We expect, Node D should get the updated state of L2 Cache from {A,B,C}.
>                 
>                 *Scenario (Issue) 2:*
>                 -Initially the cluster comprises of 4 nodes, namely {A,B,C,D}.
>                 -Somehow, node D gets removed from the cluster view.
>                 -Then some updates/inserts in hibernate L2 cache is done on Node B.
>                 -These updates/inserts gets propagated to all the nodes in the current cluster view, i.e. {A,B,C}.
>                 -And these updates/inserts doesn't get propagated to the Node D.
>                 -Now D has stale state of the L2 cache.
>                 -Now D rejoins the cluster {A,B,C}.
>                 -Now the updated cluster view is {A,B,C,D}.
>                 -Still D has stale state of the L2 cache.
>                 -We expect, Node D should get the updated state of L2 Cache from {A,B,C}.
>                 
>                 *Scenario (Issue) 3:*
>                 -Initially the cluster comprises of 4 nodes, namely {A,B,C,D}.
>                 -Somehow, node D gets removed from the cluster view.
>                 -Then some updates/inserts in hibernate L2 cache is done on Node B.
>                 -These updates/inserts gets propagated to all the nodes in the current cluster view, i.e. {A,B,C}.
>                 -And these updates/inserts doesn't get propagated to the Node D.
>                 -Subsequently, some updates/inserts in hibernate L2 cache is done on Node D too. These updates are done on some other keys, and not on the keys on which the updates were done by Node B.
>                 -Now {A,B,C} and Node D have different but updated state of the L2 cache, And are not in sync.
>                 -Now D rejoins the cluster {A,B,C}.
>                 -Now the updated cluster view is {A,B,C,D}.
>                 -Still {A,B,C} and Node D have different but updated state of the L2 cache, And are not in sync.
>                 -We expect, updates from {A,B,C} and Node D should get merged to all the nodes in cluster.
>                 
>                 *Scenario (Issue) 4:*
>                 -Initially the cluster comprises of 4 nodes, namely {A,B,C,D}.
>                 -Somehow, node D gets removed from the cluster view.
>                 -Then some updates/inserts in hibernate L2 cache is done on Node B.
>                 -These updates/inserts gets propagated to all the nodes in the current cluster view, i.e. {A,B,C}.
>                 -And these updates/inserts doesn't get propagated to the Node D.
>                 -Subsequently, some updates/inserts in hibernate L2 cache is done on Node D too. These updates might be on the same keys on which the updates were  done by Node B.
>                 -Now D has more updated state of the L2 cache.
>                 -And {A,B,C} are having stale state of the L2 Cache.
>                 -Now D rejoins the cluster {A,B,C}.
>                 -Now the updated cluster view is {A,B,C,D}.
>                 -Still {A,B,C} have stale state of the L2 cache.
>                 -We expect, {A,B,C} should get the updated state of L2 Cache from Node D.
>                 
>                 



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