[jbosscache-issues] [JBoss JIRA] (JBCACHE-1632) ConcurrentModificationException in printCacheDetails

[Dennis Reed (JIRA)]

Dennis Reed created JBCACHE-1632:
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             Summary: ConcurrentModificationException in printCacheDetails
                 Key: JBCACHE-1632
                 URL: https://issues.jboss.org/browse/JBCACHE-1632
             Project: JBoss Cache
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Locking
    Affects Versions: 3.2.8.GA
            Reporter: Dennis Reed
            Assignee: Dennis Reed


printCacheDetails does not acquire locks on nodes, so can encounter a ConcurrentModificationException if another thread modifies the node while it's being read.

java.util.ConcurrentModificationException
        at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
        at java.util.HashMap$EntryIterator.next(HashMap.java:834)
        at java.util.HashMap$EntryIterator.next(HashMap.java:832)
        at java.util.AbstractMap.toString(AbstractMap.java:485)
        at java.lang.String.valueOf(String.java:2826)
        at java.lang.StringBuilder.append(StringBuilder.java:115)
        at java.util.AbstractMap.toString(AbstractMap.java:490)
        at java.lang.String.valueOf(String.java:2826)
        at java.lang.StringBuilder.append(StringBuilder.java:115)
        at org.jboss.cache.UnversionedNode.printDetailsInMap(UnversionedNode.java:562)
        at org.jboss.cache.UnversionedNode.printDetails(UnversionedNode.java:313)
        at org.jboss.cache.UnversionedNode.printDetailsInMap(UnversionedNode.java:566)
        at org.jboss.cache.UnversionedNode.printDetails(UnversionedNode.java:313)
        at org.jboss.cache.UnversionedNode.printDetailsInMap(UnversionedNode.java:566)
        at org.jboss.cache.UnversionedNode.printDetails(UnversionedNode.java:313)
        at org.jboss.cache.DataContainerImpl.printDetails(DataContainerImpl.java:502)
        at org.jboss.cache.util.CachePrinter.printCacheDetails(CachePrinter.java:56)
        at org.jboss.cache.jmx.CacheJmxWrapper.printCacheDetails(CacheJmxWrapper.java:141)

There do not currently appear to be any other side effects other than the printCacheDetails call throwing the ConcurrentModificationException.


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