[infinispan-issues] [JBoss JIRA] (ISPN-3722) State transfer must be enabled for Lucene Directory if clustered caches are used

[Pedro Ruivo (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-3722?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on ISPN-3722 started by Pedro Ruivo.

> State transfer must be enabled for Lucene Directory if clustered caches are used
> --------------------------------------------------------------------------------
>
>                 Key: ISPN-3722
>                 URL: https://issues.jboss.org/browse/ISPN-3722
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Lucene Directory
>    Affects Versions: 6.0.0.CR1
>            Reporter: Pedro Ruivo
>            Assignee: Pedro Ruivo
>             Fix For: 6.0.0.Final
>
>
> take a look at the following code:
> {code:java}
> public Set<String> getFileList() {
>       Set<String> fileList = (Set<String>) cache.get(fileListCacheKey);
>       if (fileList == null) {
>          //...
>          Set<String> prev = (Set<String>) cache.putIfAbsent(fileListCacheKey, fileList);
>         //...
>       }
>       //..
>       return fileList;
>    }
> {code}
> when it requests the file list, the joiner does not have the data locally and it tries to do a putIfAbsent with an empty set. However, when it reaches the primary owner (if not changed), it will return the current file list. 
> After, it tries to read the files returned in the set and it cannot find it, throwing an IOException -- "Read past EOF"
> A validation should be made in order to not allow clustered caches without state transfer.

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