TTL defined in hazelcast.yaml and not working - Spring Boot

[Tomislav Šimović]

Hi,

I am pretty new to the hazelcast thing, and I have an issue that I've been working on for about this week.

I have defined this hazelcast.yaml to the src/main/java/resources:

hazelcast:

    map:

        marketOfferModes:

            time-to-live-seconds: 10

            max-idle-seconds: 10

    network:

        join:

            multicast:

                enabled: true

So, my problem is that cache is shared between members on the cluster but is not evicted, although the TTL is defined.

I tried this hazelcast.yaml with the basic Spring Boot API that gets books by ISBN, and it works, but I can't get it working with this more complicated service.

I don't know where to look anymore, and any help would be appreciated.

P.S. I'm using hazelcast version: 4.2.5

[Neil Stevenson]

Try the below. The first print confirms config is loaded from the file, the print in the listener shows the entry being expired.

Works for me with 4.2.5.

The usual problem with YAML is indenting..

    public static void main(String[] args) throws InterruptedException {

        Config config = new ClasspathYamlConfig("hazelcast.yaml");

        System.out.println(config.getMapConfigs());

        HazelcastInstance hz = Hazelcast.newHazelcastInstance(config);

        IMap<String, String> marketOfferModes = hz.getMap("marketOfferModes");

        marketOfferModes.addEntryListener(new MyListener(), true);

        TimeUnit.SECONDS.sleep(5L);

        marketOfferModes.put("hello", "world");

        TimeUnit.SECONDS.sleep(15L);

        hz.shutdown();

    }

    static class MyListener implements EntryExpiredListener<String, String> {

       @Override

       public void entryExpired(EntryEvent<String, String> event) {

           System.out.println(event);

       }  

    }

[Tomislav Šimović]

Hi Neil,

Thank you for your answer!
I did that, and the app is not executing the entryExpired method.

This is the only log that I got:

{MarketOfferMetadataModel=MapConfig{name='MarketOfferMetadataModel', inMemoryFormat='BINARY', metadataPolicy=CREATE_ON_UPDATE, backupCount=1, asyncBackupCount=0, timeToLiveSeconds=10, maxIdleSeconds=10, readBackupData=false, evictionConfig=EvictionConfig{size=500, maxSizePolicy=PER_NODE, evictionPolicy=NONE, comparatorClassName=null, comparator=null}, merkleTree=MerkleTreeConfig{enabled=false, depth=10}, eventJournal=EventJournalConfig{enabled=false, capacity=10000, timeToLiveSeconds=0}, hotRestart=HotRestartConfig{enabled=false, fsync=false}, nearCacheConfig=null, mapStoreConfig=MapStoreConfig{enabled=false, className='null', factoryClassName='null', writeDelaySeconds=0, writeBatchSize=1, implementation=null, factoryImplementation=null, properties={}, initialLoadMode=LAZY, writeCoalescing=true}, mergePolicyConfig=MergePolicyConfig{policy='com.hazelcast.spi.merge.PutIfAbsentMergePolicy', batchSize=100}, wanReplicationRef=null, entryListenerConfigs=null, indexConfigs=null, attributeConfigs=null, splitBrainProtectionName=null, queryCacheConfigs=null, cacheDeserializedValues=INDEX_ONLY, statisticsEnabled=true, entryStatsEnabled=false}}

 Based on this it looks like the configuration is loaded correctly, but I don't know what's happening with eviction.

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[Neil Stevenson]

 Next thing to try is to confirm if the data is really present where you expect, as the map name in your log above differs from the YAML in the earlier message.

 You should see this be non-zero once you've put data in, and reduce to zero as the data expires.

 Something like printing 'hazelcastInstance.getMap("MarketOfferMetadataModel").size()' in a loop

(or, use the Management Center, which makes it even easier)

 With expiry, you need to be careful that testing the data is there doesn't keep it alive! So use "size()" rather than "get(K)"  etc

Neil