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From "Marcin Nowak" <marcin.j.no...@comarch.com>
Subject Adding nodes at the same time in two different sessions
Date Fri, 03 Nov 2006 12:29:51 GMT
Hi,

When adding nodes to the repository in two simultaneously threads and
sessions at the same time I get this:

javax.jcr.InvalidItemStateException: /: the item cannot be saved because it
has been modified externally.
	at
org.apache.jackrabbit.rmi.server.ServerObject.getRepositoryException(ServerO
bject.java:104)
	at
org.apache.jackrabbit.rmi.server.ServerSession.save(ServerSession.java:213)
	at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
	at sun.rmi.transport.Transport$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.rmi.transport.Transport.serviceCall(Unknown Source)
	at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown
Source)
	at java.lang.Thread.run(Unknown Source)
	at
sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown
Source)
	at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
	at sun.rmi.server.UnicastRef.invoke(Unknown Source)
	at org.apache.jackrabbit.rmi.server.ServerSession_Stub.save(Unknown
Source)
	at
org.apache.jackrabbit.rmi.client.ClientSession.save(ClientSession.java:207)

nodes are referencable but not versionable - test involved adding 20 nodes
in two sessions(10 nodes in one session) each in another thread at the same
time to an empty repository, first we've created parent node ('a' in session
one and 'b' in session two) and than we've putted there 10 nodes with
different names (10 to node 'a' for session one and another 10 to node 'b'
for session two) and it generates exception.

BR,
Marcin Nowak 


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