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Zookeeper >> mail # user >> ephemeral node not removed after the client session is long gone


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Jun Rao 2011-09-25, 18:54
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Camille Fournier 2011-09-25, 19:56
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kishore g 2011-09-26, 05:06
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Re: ephemeral node not removed after the client session is long gone
Any idea on why this is happened. I tried reproducing this by doing the
following repeatedly
* create a session
* create ephemeral node
* close the session

Could not reproduce the issue.

We can provide additional details if needed

thanks,
Kishore G

On Sun, Sep 25, 2011 at 10:06 PM, kishore g <[EMAIL PROTECTED]> wrote:

> Hi,
>
> I got the following information from the logs.
>
> The node that still exists is
> /kafka-tracking/consumers/UserPerformanceEvent-<host>/owners/UserPerformanceEvent/529-7
>
> I saw that the ephemeral owner is 86167322861045079 which is session id
> 0x13220b93e610550.
>
> After searching in the transaction log of one of the ZK servers found that
> session expired
>
> 9/22/11 12:17:57 PM PDT session 0x13220b93e610550 cxid 0x74 zxid
> 0x601bd36f7 closeSession null
>
> On digging further into the logs I found that there were multiple sessions
> created in quick succession and every session tried to create the same node.
> But i verified that the sessions were closed and opened in order
> 9/22/11 12:17:56 PM PDT session 0x13220b93e610550 cxid 0x0 zxid 0x601bd36b5
> createSession 6000
> 9/22/11 12:17:57 PM PDT session 0x13220b93e610550 cxid 0x74 zxid
> 0x601bd36f7 closeSession null
> 9/22/11 12:17:58 PM PDT session 0x13220b93e610551 cxid 0x0 zxid 0x601bd36f8
> createSession 6000
> 9/22/11 12:17:59 PM PDT session 0x13220b93e610551 cxid 0x74 zxid
> 0x601bd373a closeSession null
> 9/22/11 12:18:00 PM PDT session 0x13220b93e610552 cxid 0x0 zxid 0x601bd373e
> createSession 6000
> 9/22/11 12:18:01 PM PDT session 0x13220b93e610552 cxid 0x6c zxid
> 0x601bd37a0 closeSession null
> 9/22/11 12:18:02 PM PDT session 0x13220b93e610553 cxid 0x0 zxid 0x601bd37e9
> createSession 6000
> 9/22/11 12:18:03 PM PDT session 0x13220b93e610553 cxid 0x74 zxid
> 0x601bd382b closeSession null
> 9/22/11 12:18:04 PM PDT session 0x13220b93e610554 cxid 0x0 zxid 0x601bd383c
> createSession 6000
> 9/22/11 12:18:05 PM PDT session 0x13220b93e610554 cxid 0x6a zxid
> 0x601bd388f closeSession null
> 9/22/11 12:18:06 PM PDT session 0x13220b93e610555 cxid 0x0 zxid 0x601bd3895
> createSession 6000
> 9/22/11 12:18:07 PM PDT session 0x13220b93e610555 cxid 0x6a zxid
> 0x601bd38cd closeSession null
> 9/22/11 12:18:10 PM PDT session 0x13220b93e610556 cxid 0x0 zxid 0x601bd38d1
> createSession 6000
> 9/22/11 12:18:11 PM PDT session 0x13220b93e610557 cxid 0x0 zxid 0x601bd38f2
> createSession 6000
> 9/22/11 12:18:11 PM PDT session 0x13220b93e610557 cxid 0x51 zxid
> 0x601bd396a closeSession null
>
> Here is the log output for the sessions that tried creating the same node
>
> 9/22/11 12:17:54 PM PDT session 0x13220b93e61054f cxid 0x42 zxid
> 0x601bd366b create
> '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7
> 9/22/11 12:17:56 PM PDT session 0x13220b93e610550 cxid 0x42 zxid
> 0x601bd36ce create
> '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7
> 9/22/11 12:17:58 PM PDT session 0x13220b93e610551 cxid 0x42 zxid
> 0x601bd3711 create
> '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7
> 9/22/11 12:18:00 PM PDT session 0x13220b93e610552 cxid 0x42 zxid
> 0x601bd3777 create
> '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7
> 9/22/11 12:18:02 PM PDT session 0x13220b93e610553 cxid 0x42 zxid
> 0x601bd3802 create
> '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7
> 9/22/11 12:18:05 PM PDT session 0x13220b93e610554 cxid 0x44 zxid
> 0x601bd385d create
> '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7
> 9/22/11 12:18:07 PM PDT session 0x13220b93e610555 cxid 0x44 zxid
> 0x601bd38b0 create
> '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7
> 9/22/11 12:18:11 PM PDT session 0x13220b93e610557 cxid 0x52 zxid
> 0x601bd396b create
> '/kafka-tracking/consumers/UserPerformanceEvent-<hostname>/owners/UserPerformanceEvent/529-7
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Fournier, Camille F. 2011-09-27, 21:20
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Mahadev Konar 2011-09-27, 23:26
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Camille Fournier 2011-09-28, 00:42
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kishore g 2011-09-28, 04:38
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Mahadev Konar 2011-09-29, 07:20
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