Hi Aaron,

Which version of Ignite do you use? Is Ignite Native Persistence enabled on your node? Since 2.4, in persistent mode partitions are mapped to nodes according to Baseline Topology. You may need to set new Baseline Topology of your new set of nodes in order to trigger rebalancing.
Read more: https://apacheignite.readme.io/docs/cluster-activation

Best Regards,
Ivan Rakov

On 22.03.2018 14:02, [email protected] wrote:
Hi all,

We had a partition cache with backup as zero, but we found sometime even a new nodes join, the cache's partition not re-balance.

one of the node may contain all the primary partition, while other may have none partition.

so will the re-balance happen under a specific condition?  cache configure as:

<bean class="org.apache.ignite.configuration.CacheConfiguration" 
id="ExampleCache">

        <property name="name" value="ExampleCache"/>
        <property name="cacheMode" value="PARTITIONED"/>
        <property name="atomicityMode" value="ATOMIC"/>

        <property name="affinity">
            <bean 
class="org.apache.ignite.cache.affinity.rendezvous.RendezvousAffinityFunction">
                <property name="partitions" value="32"/>
            </bean>
        </property>
        <property name="nodeFilter">
            <bean class="org.apache.ignite.util.AttributeNodeFilter">
                <constructor-arg name="attrName"
                                 value="Domain"/>
                <constructor-arg name="attrVal" value="Product"/>
            </bean>
        </property>
</bean>

There are two nodes with attributes Domain as Product.  While after ignite started we have a back-end thread to check on each node every one min:

ignite.affinity("ExampleCache").primaryPartitions(ignite.cluster().localNode())
And found one of the node always include the totally 32 partitions. and then forever the re-balance not happen,  if we use this filter to scan the cluster: ignite.cluster().forPredicate(new org.apache.ignite.util.AttributeNodeFilter("Domain", "Product")) We can find there are two nodes there, this cache volume only about hundreds, is there any configuration we may missed?


Regards
Aaron
------------------------------------------------------------------------
Aaron.Kuai

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