[infinispan-issues] [JBoss JIRA] (ISPN-9323) RemoteCache.getWithMetadata returns expired metadata when server is transactional cache

[Marek Posolda (Jira)]

    [ https://issues.jboss.org/browse/ISPN-9323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13647092#comment-13647092 ] 

Marek Posolda commented on ISPN-9323:
-------------------------------------

[~william.burns] Thanks for looking into this. I've just did some more testing. With infinispan-server and client both at version 9.2.4.Final, the behaviour was that if you call this:
{code}
remoteCache.put("key", "value", 1000, TimeUnit.SECONDS, 100, TimeUnit.SECONDS); 
{code}

And then you call this:
{code}
org.infinispan.Cache cacheBackedByRemoteStore = getCacheBackedByRemoteStore("localhost", 11222);
Object result = cacheBackedByRemoteStore.get("key");
{code}
the result was null. And I identified the reason was the fact that "created" and "lastUsed" were both 0 and hence remoteStore/persistenceManager treated the entry from remoteCache as expired.

I've checked that in 9.3.1.Final and 9.4.0.Final, this behaviour changed and the "result" will be correctly set.

In shortcut: I am happy now :) In other words, "created" and "lastUsed" returned in the remoteCache metadata are still 0, but it seems something changed in the implementation of remoteStore/persistenceManager as it doesn't treat this entry from remoteCache to be expired anymore.

The "created" and "lastUsed" are not important for my use-case as long as remoteStore works correctly. Leaving this JIRA open just for the case if someone else wants to have fix for "created" and "lastUsed" in the metadata. But not a priority for me anymore.

> RemoteCache.getWithMetadata returns expired metadata when server is transactional cache
> ---------------------------------------------------------------------------------------
>
>                 Key: ISPN-9323
>                 URL: https://issues.jboss.org/browse/ISPN-9323
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Hot Rod, Server
>    Affects Versions: 9.2.4.Final, 9.4.0.Final, 9.3.1.Final
>            Reporter: Marek Posolda
>            Assignee: William Burns
>            Priority: Major
>         Attachments: RemoteCacheExpirationTest.java
>
>
> I have transactional cache defined on server side (infinispan-server). I have HotRod client application (RemoteCache), which is connected to server above and which calls this:
> {code}
> remoteCache.put("key", "value", 1000, TimeUnit.SECONDS, 100, TimeUnit.SECONDS);        
> MetadataValue loaded = remoteCache.getWithMetadata("key");
> System.out.println("created: " + loaded.getCreated() + ", lastUsed: " + loaded.getLastUsed());
> {code}
> The output is:
> {code}
> created: 0, lastUsed: 0
> {code}
> This is not correct and causes some issues as entries are treated as expired. Especially when used together with remote-store, which is not able to load such entries, as PersistenceUtil#loadAndCheckExpiration method always treat the item loaded from RemoteCache as expired. See the attached application for more details.
> STEPS TO REPRODUCE:
> 1) Use infinispan-server-9.2.4.Final on server side and HotRod client (RemoteCache) version 9.2.4.Final on client side (maven dependency org.infinispan:infinispan-client-hotrod:9.2.4.Final for client app)
> 2) Unzip server 9.2.4.Final to some directory
> 3) Change ISPN_SERVER_HOME/standalone/configuration/clustered.xml and just add this transactional cache to the cache-container (NOTE: configuration "transactional" is already defined in the clustered.xml file):
> {code}
> <distributed-cache name="trans" configuration="transactional" />
> {code}
> 4) Run server with:
> {code}
> ./standalone.sh -c clustered.xml
> {code}
> 5) Run the client application from attachement. You can see the output as described above and also that entry is considered as expired (Example app uses same algorithm like RemoteStore together with PersistenceUtil.loadAndCheckExpired ). Original sources here: https://github.com/mposolda/misc/blob/master/ispn-client-listener/src/main/java/org/mposolda/expiration/RemoteCacheExpirationTest.java



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