[infinispan-issues] [JBoss JIRA] (ISPN-3092) AutoNodeSelector throws ArrayIndexOutOfBoundsException when indexName is longer then 64 chars

[Wouter De Borger (JIRA)]

Wouter De Borger created ISPN-3092:
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             Summary: AutoNodeSelector throws ArrayIndexOutOfBoundsException when indexName is longer then 64 chars
                 Key: ISPN-3092
                 URL: https://issues.jboss.org/browse/ISPN-3092
             Project: Infinispan
          Issue Type: Bug
            Reporter: Wouter De Borger
            Assignee: Mircea Markus


When hibernate search is used (with capedwarf for example), adding a fourth server to the cluster crashes infinispan.

I've narrowed the problem down to org.hibernate.search.backend.impl.jgroups.AutoNodeSelector:78

Here the following formula is used to calculate an array index

int selectionRange = members.size() - 1;
int selected = ( indexName.hashCode() % selectionRange) + 1;

if indexname is long (like "default_taskworker-java__com.google.appengine.api.datastore.Entity")
the hashcode becomes negative due to integer overflow, resulting in a negative index


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