Hazelcast Near Cache

[amitava...@gmail.com]

I have a distributed IMAP. I want near cache enabled on certain nodes and not enabled on other nodes ..

We are using hazelcast 3.7 

But we see getting the warning : 2016-09-04 14:34:50.123  WARN 9727 --- [ration.thread-1] .i.o.NearCacheBatchInvalidationOperation : [192.168.99.1]:5703 [dev] [3.7] Cache clear operation has been accepted while near cache is not enabled for WISH.MAP map. Possible configuration conflict among nodes.

HOw to enable this ?

---

NODE 1:

<map name="MAP1">

    <in-memory-format>BINARY</in-memory-format>
    <time-to-live-seconds>0</time-to-live-seconds>
    <max-idle-seconds>600</max-idle-seconds>
    <eviction-policy>LRU</eviction-policy>
    <max-size policy="FREE_HEAP_PERCENTAGE">10</max-size>
    <eviction-percentage>20</eviction-percentage>
    <min-eviction-check-millis>5000</min-eviction-check-millis>

    <near-cache>
        <in-memory-format>OBJECT</in-memory-format>
        <max-size>1000</max-size>
        <eviction-policy>LRU</eviction-policy>
        <max-idle-seconds>600</max-idle-seconds>
        <time-to-live-seconds>0</time-to-live-seconds>
        <invalidate-on-change>true</invalidate-on-change>
        <cache-local-entries>true</cache-local-entries>
    </near-cache>
</map>

NODE 2:

<map name="MAP1">
    <in-memory-format>BINARY</in-memory-format>
    <time-to-live-seconds>0</time-to-live-seconds>
    <max-idle-seconds>600</max-idle-seconds>
    <eviction-policy>LRU</eviction-policy>
    <max-size policy="FREE_HEAP_PERCENTAGE">10</max-size>
    <eviction-percentage>20</eviction-percentage>
    <min-eviction-check-millis>5000</min-eviction-check-millis>

</map>

[Noctarius]

Your map, that you want to enable near-cache for, seems to be called “WISH.MAP” whereas your configuration uses “MAP1” as a name.

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[Amitava Biswas]

i changed the config while posting here -- from WISH.MAP to MAP1 just for confidentiality

[Ahmet Mircik]

It is a harmless warning message indicates that your configuration differs among the nodes. But i can't see strong reason to print it as a warning. NearCaches can be configured local to a node and expecting all nodes always have same near-cache config doesn't make sense. You can follow the issue here: https://github.com/hazelcast/hazelcast/issues/8841

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