[jira] [Created] (OAK-1468) CacheLIRS returns null value

[Marcel Reutegger (JIRA)]

Marcel Reutegger created OAK-1468:
-------------------------------------

             Summary: CacheLIRS returns null value
                 Key: OAK-1468
                 URL: https://issues.apache.org/jira/browse/OAK-1468
             Project: Jackrabbit Oak
          Issue Type: Bug
          Components: core
    Affects Versions: 0.17.1
            Reporter: Marcel Reutegger


While running some test I see the following NPE:

{noformat}
Caused by: java.lang.NullPointerException: null
        at 
org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.readChildren(DocumentNodeStore.java:629)
        at 
org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore$3.call(DocumentNodeStore.java:589)
        at 
org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore$3.call(DocumentNodeStore.java:586)
        at 
org.apache.jackrabbit.oak.cache.CacheLIRS$Segment.get(CacheLIRS.java:841)
        at org.apache.jackrabbit.oak.cache.CacheLIRS.get(CacheLIRS.java:212)
        at 
org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore.getChildren(DocumentNodeStore.java:586)
        ... 25 common frames omitted
{noformat}

The NPE shouldn't be possible there, because the Callable implementation 
returns a non-null value (unless I'm terribly mistaken). The hasMore flag of 
the returned Children object is set before each of the returns statements in 
DocumentNodeStore.readChildren().

Please note, this happened with a previous version of Oak where the default 
cache implementation was CacheLIRS. Right now, the DocumentNodeStore uses the 
Guava implementation per default.



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