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Date: Wed, 20 Mar 2013 22:22:05 -0500
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Subject: Re: Error Path when creating a node
From: Bahman Kalali <bahman.kalali@gmail.com>
To: user@zookeeper.apache.org
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I think I find a way to create this /apps/neo4j/zookeeper/data path
recursively in Java code, but I need it change the mode to
CreateMode.PERSISTENT instead of CreateMode.EPHEMERAL_
SEQUENTIAL.

I am not sure why I did not run into issues on windows. The only difference
is that on windows the root is /zookeeper/data and on unix is
/apps/neo4j/zookeeper/data.

BR//Bahman
.

On Wed, Mar 20, 2013 at 5:06 PM, Camille Fournier <camille@apache.org>wrote:

> Did you create this path on the unix file system, or in ZooKeeper?
> ZooKeeper isn't reading the unix file system for nodes, it's reading its
> own internal data tree. You need to create the nodes in ZooKeeper.
>
>
> On Wed, Mar 20, 2013 at 6:04 PM, Bahman Kalali <bahman.kalali@gmail.com
> >wrote:
>
> > Hi Camille,
> >
> > Thank you very much for your reply!
> >
> > I already created the path /apps/neo4j/zookeeper/data on unix box. Under
> > this path for a cluster of three servers, I have zk1,zk2,zk3 for each
> > server where each zk1, zk2, zk3 have myid files. Also, I can see that
> > version-2 also created under  zk1,zk2,zk3. All these directors are
> created
> > manualy under my user id and not root.
> >
> > However, I still when I create a node under /apps/neo4j/zookeeper/data, I
> > will get an error "Error Path:/apps/neo4j/zookeeper/data
> > Error:KeeperErrorCode = NoNode for /apps/neo4j/zookeeper/data"
> >
> > BR//Bahman
> >
> >
> >
> > On Wed, Mar 20, 2013 at 4:29 PM, Camille Fournier <camille@apache.org
> > >wrote:
> >
> > > The path /apps/neo4j/zookeeper/data has not been created in the ZK on
> > your
> > > unix box. You need to create that path before you can write an
> ephemeral
> > > node to it. You probably did this already on your windows ZK which is
> why
> > > you aren't seeing the error. ZooKeeper does not create parent nodes in
> a
> > > path for you, you must create the full path yourself if it hasn't been
> > > created.
> > > As per the documentation:
> > > "If the parent node does not exist in the ZooKeeper, a KeeperException
> > with
> > > error code KeeperException.NoNode will be thrown."
> > >
> > >
> > > On Wed, Mar 20, 2013 at 4:52 PM, Bahman Kalali <
> bahman.kalali@gmail.com
> > > >wrote:
> > >
> > > > Hi,
> > > >
> > > > I am using this API to create a node:
> > > >
> > > >         lockPath = zk.create(/apps/neo4j/zookeeper/data/searchlock,
> > null,
> > > >                     Ids.OPEN_ACL_UNSAFE,
> > > CreateMode.EPHEMERAL_SEQUENTIAL);
> > > >
> > > > Here is my setting in zoo.cfg in one of three servers:
> > > >
> > > > tickTime=2000
> > > > initLimit=10
> > > > syncLimit=5
> > > > dataDir=/apps/neo4j/zookeeper/data/zk1
> > > > dataLogDir=/apps/neo4j/zookeeper/log/zk1
> > > > clientPort=2185
> > > > server.1=upladevzoo01v:2988:3988
> > > > server.2=upladevzoo01v:2989:3989
> > > > server.3=upladevzoo01v:2990:3990
> > > >
> > > >
> > > > However, I get this exception on the server log "Error
> > > > Path:/apps/neo4j/zookeeper/data"
> > > >
> > > > 2013-03-20 15:39:44,882 [myid:2] - INFO  [ProcessThread(sid:2
> > > > cport:-1)::PrepRequestProcessor@627] - Got user-level
> KeeperException
> > > when
> > > > processing sessionid:0x23d895990500004 type:create cxid:0x1
> > > > zxid:0x100000020 txntype:-1 reqpath:n/a Error
> > > > Path:/apps/neo4j/zookeeper/data Error:KeeperErrorCode = NoNode for
> > > > /apps/neo4j/zookeeper/data
> > > >
> > > > The same setting works fine on my local windows box, but not on a
> unix
> > > box.
> > > >
> > > > Does this have anything to do with permission on unix box?
> > > >
> > > > BR//Bahman
> > > >
> > >
> >
>

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