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Zookeeper >> mail # user >> Re: ephemeral node not deleted after client session closed


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kishore g 2011-11-11, 18:15
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Jun Rao 2011-02-11, 18:01
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Mahadev Konar 2011-02-11, 18:08
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Jun Rao 2011-02-11, 18:43
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Mahadev Konar 2011-02-11, 18:54
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Jun Rao 2011-02-11, 19:58
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Fournier, Camille F. [Tec... 2011-02-11, 21:32
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Re: ephemeral node not deleted after client long gone
I saw the following entries on the session. It seems that the client that
created the ephemeral node has already been closed. Also, I was using ZK
3.2.1 server and ZK 3.3.0 client. Any issues like that related to ZK 3.2.1?
Thanks,

2011-02-11 04:39:07,350 - INFO
[NIOServerCxn.Factory:12913:NIOServerCnxn@615] - Creating new session
0x22cab09a7380273
2011-02-11 04:39:25,803 - INFO  [CommitProcessor:0:NIOServerCnxn@833] -
closing session:0x22cab09a7380273 NIOServerCnxn:
java.nio.channels.SocketChannel[connected local=/172.17.135.39:12913remote=/
172.16.78.170:45385]

Jun

On Fri, Feb 11, 2011 at 1:32 PM, Fournier, Camille F. [Tech] <
[EMAIL PROTECTED]> wrote:

> There should be a log line somewhere associating that ephemeralOwner
> sessionID to a login, something like:
> 2010-12-07 02:04:26,824 - INFO  [CommitProcessor:0:NIOServerCnxn@1580] -
> Established session 0x2cbe924f570000 with negotiated timeout 30000 for
> client /10.150.27.112:53673
>
> -----Original Message-----
> From: Jun Rao [mailto:[EMAIL PROTECTED]]
> Sent: Friday, February 11, 2011 2:58 PM
> To: [EMAIL PROTECTED]
> Subject: Re: ephemeral node not deleted after client long gone
>
> Hmm, I am pretty sure the client that created the ephemeral node is gone.
> That client typically creates a bunch of ephemeral nodes. It seems that all
> nodes except one is gone. The hanging ephemeral node can be read from any
> ZK
> server and its info is listed below. Is there a way to get the information
> of the client who created an ephemeral node (host, processid, etc)?
>
> ctime = Fri Feb 11 04:39:25 PST 2011
> mZxid = 0x1f03f5ea35
> mtime = Fri Feb 11 04:39:25 PST 2011
> pZxid = 0x1f03f5ea35
> cversion = 0
> dataVersion = 0
> aclVersion = 0
> ephemeralOwner = 0x22cab09a7380273
> dataLength = 40
> numChildren = 0
>
> Thanks,
>
> Jun
>
> On Fri, Feb 11, 2011 at 10:54 AM, Mahadev Konar <[EMAIL PROTECTED]>
> wrote:
>
> > Jun Rao,
> >  No it cannot happen without a zookeeper restart.
> >
> > Are you sure you are shutting down the client?
> >
> > thanks
> > mahadev
> >
> > On Fri, Feb 11, 2011 at 10:43 AM, Jun Rao <[EMAIL PROTECTED]> wrote:
> > > Can the problems fixed in
> > > https://issues.apache.org/jira/browse/ZOOKEEPER-962 and
> > > https://issues.apache.org/<
> > https://issues.apache.org/jira/browse/ZOOKEEPER-919>
> > > jira/browse/ZOOKEEPER-919<
> > https://issues.apache.org/jira/browse/ZOOKEEPER-919>
> > > happen
> > > even when there is no restart in the ZK server ensemble? For the
> problem
> > > that I have seen, the ZK servers have always been up.
> > >
> > > Thanks,
> > >
> > > Jun
> > >
> > > On Fri, Feb 11, 2011 at 10:08 AM, Mahadev Konar <[EMAIL PROTECTED]>
> > wrote:
> > >
> > >> Hi Jun,
> > >>  Yes there was a bug reported:
> > >>
> > >> https://issues.apache.org/jira/browse/ZOOKEEPER-919
> > >>
> > >> Is this what you are seeing?
> > >>
> > >> thanks
> > >> mahadev
> > >>
> > >> On Fri, Feb 11, 2011 at 10:01 AM, Jun Rao <[EMAIL PROTECTED]> wrote:
> > >> > Hi,
> > >> >
> > >> > I found an issue in zookeeper 3.3.0 where an ephemeral node didn't
> get
> > >> > deleted after the client was long gone. This seems to be a rare
> event
> > and
> > >> > happens 1 out of 600 tries. Has there been a similar problem
> > >> reported/fixed?
> > >> > Thanks,
> > >> >
> > >> > Jun
> > >> >
> > >>
> > >
> >
>
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB