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java.util.ConcurrentModificationException: 	at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)	at java.util.AbstractList$Itr.next(AbstractList.java:343)	at java.util.AbstractList.equals(AbstractList.java:505)	at com.tc.object.tx.TransactionBatchWriter$FoldingKey.canAcceptFold(TransactionBatchWriter.java:615)	at com.tc.object.tx.TransactionBatchWriter.getOrCreateBuffer(TransactionBatchWriter.java:191)	at com.tc.object.tx.TransactionBatchWriter.addTransaction(TransactionBatchWriter.java:278)	at com.tc.object.tx.TransactionSequencer.addTransactionToBatch(TransactionSequencer.java:86)	at com.tc.object.tx.TransactionSequencer.addTxnInternal(TransactionSequencer.java:116)	at com.tc.object.tx.TransactionSequencer.addTransaction(TransactionSequencer.java:95)	at com.tc.object.tx.RemoteTransactionManagerImpl.commit(RemoteTransactionManagerImpl.java:230)	at com.tc.object.tx.ClientTransactionManagerImpl.commitInternal(ClientTransactionManagerImpl.java:456)	at com.tc.object.tx.ClientTransactionManagerImpl.commit(ClientTransactionManagerImpl.java:421)	at com.tc.object.tx.ClientTransactionManagerImpl.commit(ClientTransactionManagerImpl.java:360)	at com.tc.object.bytecode.ManagerImpl.monitorExit(ManagerImpl.java:520)	at com.tc.object.bytecode.ManagerUtil.monitorExit(ManagerUtil.java:478)	at net.sf.ehcache.Cache.put(CacheTC.java:637)	at net.sf.ehcache.Cache.put(CacheTC.java:573)	at net.sf.ehcache.hibernate.EhCache.put(EhCache.java:130)	at org.hibernate.cache.ReadWriteCache.put(ReadWriteCache.java:159)	at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:156)	at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:854)	at org.hibernate.loader.Loader.doQuery(Loader.java:729)	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)	at org.hibernate.loader.Loader.loadCollection(Loader.java:1994)	at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:36)