[JCR-566] Versioning bug with restore and transactions

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.1
• Component/s: jackrabbit-core, transactions, versioning
• Assignee: Tobias Bocanegra
• Reporter: Florent Guillaume
• Created: 11/Sep/06 14:32
• Updated: 04/May/09 19:53

Description

This is a versioning bug in the presence of restore and transactions. It's hard to reproduce and seems memory-layout dependent.
At the moment I only have a jython testcase, see below. This is with a svn checkout from today (442228).

Basically the program does create a node and subnode and do some checkins, checkouts, restore, modifications, in successive transactions. Transactions are managed manually using the xaresource API, but it would be equivalent to use a UserTransaction (the sequence of xaresource calls in the end is the same).

The program log and stack trace is:

start 1
node 36eca6a5-8e5d-46a8-897a-4b81734aaad4
commit 1
start 2
commit 2
start 3
commit 3
javax.transaction.xa.XAException
at org.apache.jackrabbit.core.TransactionContext.prepare(TransactionContext.java:138)
at org.apache.jackrabbit.core.XASessionImpl.prepare(XASessionImpl.java:300)
File "debug1.py", line 128, in doit
File "debug1.py", line 145, in ?
Caused by: org.apache.jackrabbit.core.TransactionException: Unable to prepare transaction.
at org.apache.jackrabbit.core.state.XAItemStateManager.prepare(XAItemStateManager.java:159)
at org.apache.jackrabbit.core.TransactionContext.prepare(TransactionContext.java:121)
... 22 more
Caused by: org.apache.jackrabbit.core.state.StaleItemStateException: 36eca6a5-8e5d-46a8-897a-4b81734aaad4/

{http://www.jcp.org/jcr/1.0}

predecessors has been modified externally
at org.apache.jackrabbit.core.state.SharedItemStateManager$Update.begin(SharedItemStateManager.java:546)
at org.apache.jackrabbit.core.state.SharedItemStateManager.beginUpdate(SharedItemStateManager.java:717)
at org.apache.jackrabbit.core.state.XAItemStateManager.prepare(XAItemStateManager.java:151)
... 23 more
javax.transaction.xa.XAException: javax.transaction.xa.XAException

Note that the mentionned property (here, "jcr:predecessors") has changed when I was cutting down on the program size to get a simpler testcase. It's not necessarily a "system" property, and sometimes it was property of the subnode created under the main node.