Quite a few platforms make the specification of weak listeners explicit e.g.
in ActionScript you can specify a boolean in addEventListener that specifies
whether the event source should hold weak references to listeners. Therefore
I think whether you want an event source to hold a weak or strong re
Hi all,
I'm developing a library of primitives backed by ZooKeeper. An issue I've
recently hit is that you can only add children to persistent nodes.
When you're creating primitives for things like locking - for use for exampe
synchronizing cluster-wide processing of a NOSQL database like Cassand
zkServer.sh uses sh's builtin echo on BSD, behaves incorrectly.
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Key: ZOOKEEPER-722
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-722
Project: Zookeeper
Issue Type: Bug
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Ivan Kelly updated ZOOKEEPER-722:
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Attachment: zk-722.diff
Fix by making zk use the echo executable directly when -n in use.
> z
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Ivan Kelly updated ZOOKEEPER-722:
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Release Note: Fix zkServer.sh script for BSD systems.
Status: Patch Available (was:
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Hadoop QA commented on ZOOKEEPER-722:
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-1 overall. Here are the results of testing
Hi Dominic,
Is it acceptable to use ephemeral nodes with hierarchical names, such as
"starburst.cluster.nodes"?
Hi Lei, that's perfectly fine, however the issue would be that
operations such as "getchildren(/path)" would return all these, vs if
you had an explicit path structure such as
getchildren(/path/starburst/cluster/nodes) - ie flat vs hierarchical.
Patrick
Lei Zhang wrote:
Hi Dominic,
Is it ac
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Henry Robinson commented on ZOOKEEPER-722:
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Hi Ivan -
Thanks for the patch -
Dominic Williams wrote:
1/ If a node crashes or something else goes wrong, you leave behind
persistent nodes. Over time these will grow and grow, rather like the old
tmp folders used to fill with files under Windows
That's true. One either needs to use ephemerals or use persistent and
have a "
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Ivan Kelly updated ZOOKEEPER-722:
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Attachment: zk-722.diff
> zkServer.sh uses sh's builtin echo on BSD, behaves incorrectly.
> --
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Ivan Kelly updated ZOOKEEPER-722:
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Status: In Progress (was: Patch Available)
> zkServer.sh uses sh's builtin echo on BSD, behav
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Ivan Kelly updated ZOOKEEPER-722:
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Attachment: (was: zk-722.diff)
> zkServer.sh uses sh's builtin echo on BSD, behaves incorr
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Ivan Kelly commented on ZOOKEEPER-722:
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Hi Henry,
I had assumed it used -p1, I've
Would "WeakWatcher", a proxy watcher that holds a weak reference to the
proxied watcher, not also solve this with minimal overhead? You could do
this today.
1/ Add a useWeakReferences parameter to new constructor (sets default
behaviour)
2/ Add alternative methods, which take useWeakWatcherRef
Hi Patrick,
This is a little more complex than I'd initially given consideration to. The
biggest point being the question about what would happen to an ephemeral
parent node when the session that owns it exits.
What I'd suggest might work:
- when the session that created the parent ends, ownershi
Dominic Williams wrote:
What I'd suggest might work:
- when the session that created the parent ends, ownership of the parent
could either be transferred to the owner/session that created the oldest
child, or instead ownership could be transferred to some kind of nominal
system session (which wo
You have probably heard by now that there is a discussion going on in
the Hadoop PMC as to whether a number of the subprojects (Hbase, Avro,
Zookeeper, Hive, and Pig) should move out from under the Hadoop
umbrella and become top level Apache projects (TLP). This discussion
has picked up recently s
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Henry Robinson updated ZOOKEEPER-720:
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Hadoop Flags: [Reviewed]
> Use zookeeper-{version}-sources.jar instead of zookeeper-{v
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Henry Robinson commented on ZOOKEEPER-720:
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Patch looks good to me, +1.
> Use
On 22 March 2010 16:59, Patrick Hunt wrote:
> Would "WeakWatcher", a proxy watcher that holds a weak reference to the
> proxied watcher, not also solve this with minimal overhead? You could do
> this today.
>
>
Hi,
Yup a WeakWatcher would certainly provide an interim solution.
>
> 1/ Add a us
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Florian Moga commented on ZOOKEEPER-703:
I am a GSoC applicant and I find this p
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Mahadev konar commented on ZOOKEEPER-703:
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florian,
http://hadoop.apache.org/zo
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Patrick Hunt reassigned ZOOKEEPER-722:
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Assignee: Ivan Kelly
> zkServer.sh uses sh's builtin echo on BSD, behaves incorrectl
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Henry Robinson reassigned ZOOKEEPER-722:
Assignee: Ivan Kelly (was: Henry Robinson)
Assigning back to Ivan after I gave
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Henry Robinson updated ZOOKEEPER-722:
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Status: Patch Available (was: In Progress)
> zkServer.sh uses sh's builtin echo on BS
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Henry Robinson reassigned ZOOKEEPER-722:
Assignee: Henry Robinson (was: Ivan Kelly)
> zkServer.sh uses sh's builtin echo
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Erwin Tam updated ZOOKEEPER-464:
Assignee: Erwin Tam
I'm working on this enhancement now and just about ready to submit this as a
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Patrick Hunt updated ZOOKEEPER-720:
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Affects Version/s: (was: 3.0.0)
3.3.0
> Use zookeeper-{version}
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Patrick Hunt updated ZOOKEEPER-720:
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Fix Version/s: 3.4.0
Assignee: Paolo Castagna
> Use zookeeper-{version}-sources.j
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Patrick Hunt updated ZOOKEEPER-721:
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Affects Version/s: (was: 3.3.1)
(was: 3.0.0)
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Patrick Hunt commented on ZOOKEEPER-720:
once 3.3.0 goes out officially we shoul
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Patrick Hunt updated ZOOKEEPER-722:
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Affects Version/s: 3.3.0
Fix Version/s: 3.4.0
3.3.1
> zkSer
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Hadoop QA commented on ZOOKEEPER-722:
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-1 overall. Here are the results of testing
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Patrick Hunt commented on ZOOKEEPER-719:
Is this really a bug or improvement? If
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Patrick Hunt updated ZOOKEEPER-719:
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Affects Version/s: 3.3.0
Fix Version/s: 3.4.0
> Add throttling to BookKeeper clien
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Patrick Hunt updated ZOOKEEPER-714:
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Fix Version/s: 3.4.0
> snapshotting doesn't handle runtime exceptions (like out of memory)
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Patrick Hunt updated ZOOKEEPER-715:
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Fix Version/s: 3.4.0
> add better reporting for initLimit being reached
>
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Patrick Hunt updated ZOOKEEPER-706:
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Fix Version/s: 3.4.0
> large numbers of watches can cause session re-establishment to fail
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Patrick Hunt updated ZOOKEEPER-707:
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Fix Version/s: 3.4.0
> c client close can crash with cptr null
> -
pat, i think you articulated well the problems with becoming a TLP. you
don't seem to have voted for one of the options though :)
i guess my view corresponds to option 2). it does seem like a good idea
in the long term for ZooKeeper to become its own project, but for the
near term, for the rea
let me put out an idea that we have kicked around for a while: ephemeral
containers. the idea is that the znode disappears if it doesn't have
children. you would create the znode with create("/path", data, acl,
EPHEMERAL_CONTAINER) this would result in the creation two znodes: /path
and /path/c
Hey Ben,
Perhaps you should open a JIRA for further discussion?
Thanks,
Jeff
On Mon, Mar 22, 2010 at 7:42 PM, Benjamin Reed wrote:
> let me put out an idea that we have kicked around for a while: ephemeral
> containers. the idea is that the znode disappears if it doesn't have
> children. you w
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