Hello,
we have a problem with locking and unlocking of nodes in our clustered
environment. We keep getting javax.jcr.lock.LockException: Precondition
Failed errors caused by Caused by:
org.apache.jackrabbit.webdav.DavException: Precondition Failed. We are not
sure whether this is a communication problem or a session/cluster based
error.
We are a using Jackrabbit 2.2.4 deployed as repository server on websphere
unsing two cluster nodes which are directly connected to a DB 2 database.
The errors occur randomly but constantly
when we execute our testcase trying to add several nodes one after
another. A JCR-WebDAV .doc stated the error as:
412 (Precondition Failed) – if the lock token transmitted with the
TransactionId header is not a transaction lock token or is invalid.
This is how our testcase looks like:
dmsSession = ... .loginRepository();
Node nodeToAddMixin = dmsSession.getNode("Path to node");
if (nodeToAddMixin.canAddMixin(NodeType.MIX_LOCKABLE)) {
nodeToAddMixin.addMixin(NodeType.MIX_LOCKABLE);
dmsSession.save();
}
lockManager = dmsSession.getWorkspace().getLockManager();
boolean isLocked = lockManager.isLocked("Path to node");
... wait till unlocked
if (!isLocked) {
lock = lockManager.lock("Path to node", true, false, 10,
"");
lockManager.addLockToken(lock.getLockToken());
}
... do stuff with locked node
if (lockManager != null) {
try {
if (lockManager.isLocked("Path to node")) {
if (dmsSession.hasPendingChanges()) {
dmsSession.save();
}
lockManager.unlock("Path to node");
}
} catch (RepositoryException e) {
dmsSession.logout();
// TODO Auto-generated catch block
e.printStackTrace();
}
}
dmsSession.save();
dmsSession.logout();
Does somebody know about bugs in the communication layer or obvious
programming mistakes we might have made?
Greets
Klemens Letulé
SIGNAL Krankenversicherung a. G., Sitz: Dortmund, HR B 2405, AG Dortmund
IDUNA Vereinigte Lebensversicherung aG für Handwerk, Handel und Gewerbe,
Sitz: Hamburg, HR B 2740, AG Hamburg
Deutscher Ring Krankenversicherungsverein a.G., Sitz: Hamburg,
HR B 4673, AG Hamburg,
SIGNAL IDUNA Allgemeine Versicherung AG, Sitz: Dortmund, HR B 19108,
AG Dortmund
Vorstände: Reinhold Schulte (Vorsitzender),
Dr. Karl-Josef Bierth,Jens O. Geldmacher, Marlies Hirschberg-Tafel,
Michael Johnigk, Ulrich Leitermann, Michael Petmecky,
Dr. Klaus Sticker, Prof. Dr. Markus Warg
Vorsitzender der Aufsichtsräte: Günter Kutz
SIGNAL IDUNA Gruppe Hauptverwaltungen, Internet: www.signal-iduna.de
44121 Dortmund, Hausanschrift: Joseph-Scherer-Str. 3, 44139 Dortmund
20351 Hamburg, Hausanschrift: Neue Rabenstraße 15-19, 20354 Hamburg
