[ 
https://issues.apache.org/jira/browse/OAK-1218?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

angela resolved OAK-1218.
-------------------------

    Resolution: Fixed

IMO the membership provider should properly handle a null-path returned by 
IdentifierManager#resolveUUID (method is annotated with @CheckForNull return 
value).

that should fix the test failure; if it persists please reopen this issue.

> NPE in PrincipalManagerTest#testMembers
> ---------------------------------------
>
>                 Key: OAK-1218
>                 URL: https://issues.apache.org/jira/browse/OAK-1218
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: jcr
>            Reporter: Michael Dürig
>
> {code}
> testMembers(org.apache.jackrabbit.oak.jcr.security.principal.PrincipalManagerTest)
>   Time elapsed: 0.01 sec  <<< ERROR!
> java.lang.NullPointerException
>       at 
> com.google.common.base.Preconditions.checkNotNull(Preconditions.java:192)
>       at 
> org.apache.jackrabbit.oak.core.MutableTree.getTree(MutableTree.java:378)
>       at 
> org.apache.jackrabbit.oak.core.AbstractRoot.getTree(AbstractRoot.java:229)
>       at 
> org.apache.jackrabbit.oak.core.AbstractRoot.getTree(AbstractRoot.java:65)
>       at 
> org.apache.jackrabbit.oak.security.user.AuthorizableBaseProvider.getByPath(AuthorizableBaseProvider.java:66)
>       at 
> org.apache.jackrabbit.oak.security.user.MembershipProvider$2.getNext(MembershipProvider.java:270)
>       at 
> org.apache.jackrabbit.oak.security.user.MembershipProvider$2.getNext(MembershipProvider.java:244)
>       at 
> org.apache.jackrabbit.oak.util.AbstractLazyIterator.hasNext(AbstractLazyIterator.java:39)
>       at 
> org.apache.jackrabbit.oak.security.user.GroupImpl.getMembers(GroupImpl.java:195)
>       at 
> org.apache.jackrabbit.oak.security.user.GroupImpl.getMembers(GroupImpl.java:81)
>       at 
> org.apache.jackrabbit.oak.security.user.GroupImpl$GroupPrincipal.members(GroupImpl.java:275)
>       at 
> org.apache.jackrabbit.oak.jcr.security.principal.PrincipalManagerTest.testMembers(PrincipalManagerTest.java:186)
> {code}
> This only happens on Buildbot, which seems to be caused by a non stable test 
> setup. When I run this test locally, the if branch checking {{isGroup}} is 
> never executed. 



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