[infinispan-issues] [JBoss JIRA] (ISPN-1546) FineGrainedAtomicMap key and value iterators are not threadsafe

[Vladimir Blagojevic (Commented) (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-1546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12645138#comment-12645138 ] 

Vladimir Blagojevic commented on ISPN-1546:
-------------------------------------------

Sanne, not sure how is this happening, lets figure it out! Some other thread must be invoking write operations on the same AtomicHashMap i.e FastCopyHashMap delegate field of AtomicHashMap since the thread that has been dumped above called FineGrainedAtomicHashMapProxy.keySet?
                
> FineGrainedAtomicMap key and value iterators are not threadsafe
> ---------------------------------------------------------------
>
>                 Key: ISPN-1546
>                 URL: https://issues.jboss.org/browse/ISPN-1546
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Core API, Locking and Concurrency
>            Reporter: Sanne Grinovero
>            Assignee: Vladimir Blagojevic
>
> Invoking #keySet() or #values() might fail, even when using a transaction to isolate threads:
> {code}
> java.util.ConcurrentModificationException
> 	at org.infinispan.util.FastCopyHashMap$FasyCopyHashMapIterator.nextEntry(FastCopyHashMap.java:484)
> 	at org.infinispan.util.FastCopyHashMap$KeyIterator.next(FastCopyHashMap.java:560)
> 	at java.util.AbstractCollection.addAll(AbstractCollection.java:305)
> 	at org.infinispan.atomic.FineGrainedAtomicHashMapProxy.keySet(FineGrainedAtomicHashMapProxy.java:104)
> 	at org.hibernate.ogm.dialect.infinispan.InfinispanAssociationSnapshot.getRowKeys(InfinispanAssociationSnapshot.java:59)
> 	at org.hibernate.ogm.datastore.spi.Association.getKeys(Association.java:132)
> 	at org.hibernate.ogm.loader.OgmLoader.getResultSet(OgmLoader.java:420)
> 	at org.hibernate.ogm.loader.OgmLoader.doQuery(OgmLoader.java:248)
> 	at org.hibernate.ogm.loader.OgmLoader.doQueryAndInitializeNonLazyCollections(OgmLoader.java:215)
> 	at org.hibernate.ogm.loader.OgmLoader.loadCollection(OgmLoader.java:185)
> 	at org.hibernate.ogm.loader.OgmBasicCollectionLoader.initialize(OgmBasicCollectionLoader.java:42)
> 	at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:622)
> 	at org.hibernate.event.internal.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:82)
> 	at org.hibernate.internal.SessionImpl.initializeCollection(SessionImpl.java:1607)
> 	at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:379)
> 	at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:112)
> 	at org.hibernate.collection.internal.PersistentSet.iterator(PersistentSet.java:180)
> {code}

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