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

[Pedro Ruivo (JIRA)]

Pedro Ruivo created ISPN-3722:
---------------------------------

             Summary: 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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