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POHibernate throwing a ConcurrentModificationException
primarykey
Id
11534424
data
AcceptedAnswerId
11535354
AnswerCount
3
ClosedDate
CommentCount
1
CommunityOwnedDate
CreationDate
2012-07-18T04:43:40.227
FavoriteCount
0
LastActivityDate
2016-11-02T12:51:52.583
LastEditDate
2012-07-18T05:50:37.220
LastEditorUserId
1480906
OwnerUserId
1480906
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0
PostTypeId
1
Score
0
ViewCount
6658
LastEditorDisplayName
text
Body
I am writing some tests for a persistance layer I've been working on and I've ran into an exception that that I'm having trouble dealing with, a ConcurrentModificationException it's happening at <code>org.hibernate.mapping.Table.cleanseUniqueKeyMap(Table.java:291)</code>. Which turns out to be this line of code: <pre><code>final Map.Entry<String,UniqueKey> uniqueKeyEntry = uniqueKeyEntries.next(); </code></pre> After doing a little research I've found out that the exception is caused by one thread modifying this collection while this thread is iterating over it. That being said I feel like there's nothing that I'm doing that's causing this to happen any suggestions on troubleshooting? BTW, Im using <code>hibernate 4.1.5</code>. Idk if that clears anything up or not. Here's my test: <pre><code>@Test public void testCreateMobsterUser() { try { final MobsterUserDAO test = new MobsterUserDAO(); //throws exception //does stuff w/ return value... </code></pre> As you can see we try and initialize the dao Let's see that code: <pre><code>public MobsterUserDAO() { super(MobsterUser.class); } </code></pre> Well that didn't show us much so let's look at the generic dao constructor and see if you see the problem there. <pre><code>public MobsterBaseHibernateDAO(final Class<T> clazz) { this.clazz = clazz; //This next line is where the exception is actually occuring final EntityManagerFactory factory = Persistence.createEntityManagerFactory("mobsterdb"); this.manager = (HibernateEntityManager) factory.createEntityManager(); } </code></pre> Now I'm not sure what kind of rabbit hole Persistance.createEntityManagerFactory is, but that is the last line of my code that gets executed before the exception occurs.
Tags
<java><hibernate><exception>
Title
Hibernate throwing a ConcurrentModificationException
singulars
PostAcceptedAnswerId
1. PO
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 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USAndy McCall
UserOwnerUserId
1. USAndy McCall
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PostLinksPostIdRelatedPostId
1. PL
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2. PL
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 LTLinked
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1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
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 PostTypePostTypeId
 PTAnswer
2. PO
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 PTAnswer
VotesPostIdCreationDate
1. VO
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 PostPostId
 POHibernate throwing a ConcurrentModificationException
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 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTApproveEditSuggestion
CommentsPostId
1. COThat is a bug : https://hibernate.onjira.com/browse/HHH-7456
 singulars
 PostPostId
 POHibernate throwing a ConcurrentModificationException
 UserUserId
 USSteve Ebersole

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