[infinispan-issues] [JBoss JIRA] Resolved: (ISPN-324) Cache.clear() raises a NPE if CacheMode is DIST_SYNC and NumOwners is set to 1

[Manik Surtani (JIRA)]

     [ https://jira.jboss.org/jira/browse/ISPN-324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Manik Surtani resolved ISPN-324.
--------------------------------

    Resolution: Done


> Cache.clear() raises a NPE if CacheMode is DIST_SYNC and NumOwners is set to 1
> ------------------------------------------------------------------------------
>
>                 Key: ISPN-324
>                 URL: https://jira.jboss.org/jira/browse/ISPN-324
>             Project: Infinispan
>          Issue Type: Bug
>    Affects Versions: 4.0.0.CR3
>            Reporter: Marco Ferrante
>            Assignee: Manik Surtani
>             Fix For: 4.0.0.GA
>
>
> This fragment: 
>        GlobalConfiguration gc = GlobalConfiguration.getClusteredDefault();
>         Configuration config = new Configuration();
>         config.setCacheMode(Configuration.CacheMode.DIST_SYNC);
>         config.setNumOwners(1); // no redundancy
>  
>         CacheManager cacheManager = new DefaultCacheManager(gc, config);
>         Cache cache = cacheManager.getCache();
>         cache.put("key", "value");
>         cache.clear();
>         assert cache.isEmpty();
> raises a NullPointerException at cache.clear() invokation.
> It works correctly both using other cache modes (LOCAL, REPL and INVALIDATION) or avoiding to set config.setNumOwners to 1.
> The stacktrace is:
> java.lang.NullPointerException
>         at org.infinispan.interceptors.DistributionInterceptor.isSingleOwnerAndLocal(DistributionInterceptor.java:317)
>         at org.infinispan.interceptors.DistributionInterceptor.handleWriteCommand(DistributionInterceptor.java:276)
>         at org.infinispan.interceptors.DistributionInterceptor.visitClearCommand(DistributionInterceptor.java:180)
>         at org.infinispan.commands.write.ClearCommand.acceptVisitor(ClearCommand.java:58)
>         at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
>         at org.infinispan.interceptors.LockingInterceptor.visitClearCommand(LockingInterceptor.java:169)
>         at org.infinispan.commands.write.ClearCommand.acceptVisitor(ClearCommand.java:58)
>         at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
>         at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:132)
>  ....

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