We used 3.3.3. We will check out the latest code.
Thanks Camille. Alex 2011/8/30 Camille Fournier <[email protected]> > More specifically, we fixed this for the upcoming release: > https://issues.apache.org/jira/browse/ZOOKEEPER-1046 > > You can try checking out the latest code and building it, should fix > your error. I believe 3.3.4 will be released in a week or two. > > c > > On Mon, Aug 29, 2011 at 9:56 PM, Camille Fournier <[email protected]> > wrote: > > What version of ZK were you using? > > > > On Mon, Aug 29, 2011 at 9:50 PM, 박영근(Alex) <[email protected]> wrote: > >> Hi, all > >> > >> I met a problem of NodeExistsException when creating a znode with > sequential > >> and ephemeral mode. > >> the number of total test was 6442314 and 797 errors had occurred. > >> > >> The related log message is as in the following: > >> 2011-08-27 16:26:17,559 - INFO > [ProcessThread:-1:PrepRequestProcessor@407][] > >> - Got user-level KeeperException when processing > sessionid:0x2320911802a0002 > >> type:create cxid:0x1246d7 zxid:0xfffffffffffffffe txntype:unknown > >> reqpath:n/a Error > >> Path:/NexR/MasteElection/__rwLock/readLock-lssm07-0005967078 > >> Error:KeeperErrorCode = NodeExists for > >> /NexR/MasteElection/__rwLock/readLock-lssm07-0005967078 > >> > >> The sequential number would be created by increasing parent's Cversion > in > >> the PrepRequestProcess. > >> So, I guess that this problem was caused by inconsistency of parent > znode. > >> > >> Our test scenario is very aggressive: > >> The grinder agent sends a request of creating a znode of > >> CreateMode. SEQUENTIAL_EPHEMERAL. > >> three number of servers compose ensemble. > >> each NIC of server is down and up repeatedly; > >> NIC of server1 become down every one minute and sleeping for 9 seconds, > then > >> up > >> NIC of server2 become down every 2 minute and sleeping for 9 seconds, > then > >> up > >> NIC of server3 become down every 3 minute and sleeping for 9 seconds, > then > >> up > >> > >> while the probability of error occurrence is 0.0001 as mentioned above, > >> if the ZooKeeper cannot guarantee the consistency, it is a fatal. > >> > >> Is there any idea or related issue? > >> > >> thanks in advance. > >> > >> alex. > >> > > >
