@Camille asked me how hot standby works in etcd. It's too much to answer
over the weekend. I've been organizing information and try my best to
answer now. It's better late than nothing.
The goal is to make physically different identities behave logically the
same. In order to do so, you need two t
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J.Andreina commented on ZOOKEEPER-2156:
---
Testcase failures are not related to th
We should move the discussion to JIRA so that we don't lose all the
inputs. Camille, could you open 2 JIRAs when you get a chance?
1. Node TTLs
2. Pluggable RPC endpoints, starting with HTTP
On Mon, Apr 13, 2015 at 3:00 PM, Patrick Hunt wrote:
> That's really the easy part. Coming up with somet
That's really the easy part. Coming up with something that will work in our
context is the harder bit IMO. For example, if you have multiple REST
service endpoints how will that work, one per zk server? Are you going to
tie a particular client session to a particular server, how will sessions
be ma
I also like the plugin idea, it's a good one.
-Flavio
> On 13 Apr 2015, at 18:58, Patrick Hunt wrote:
>
> Once something is generally available, embedded and easy to enable, it
> probably won't take much for someone to extend. Once they see the benefits.
> Although there are already folks inter
An even easier way to start is to put an HTTP server in front of a ZK client.
There is clearly a performance overhead, but is high performance a requirement
for such use cases?
-Flavio
> On 13 Apr 2015, at 18:48, Camille Fournier wrote:
>
> Yes ok agreed. I do personally think fully supporti
See https://builds.apache.org/job/ZooKeeper-trunk-openjdk7/779/
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[mkdir] Created dir:
/x1/jenkins
As for noting that a ZNode is a container, would you suggest the hack of a
special ephemeralOwner value or would you add a new field to Stat?
-Jordan
On April 10, 2015 at 6:40:23 PM, Patrick Hunt (ph...@apache.org) wrote:
Adding is typically good from a b/w compact perspective. If you use the
Never mind - found it (ant build-generated)
On April 13, 2015 at 2:14:24 PM, Jordan Zimmerman (jor...@jordanzimmerman.com)
wrote:
OK - I found it. How do I build it so that the generated files get correctly
placed in the source tree? I don’t see an ant task for it.
-Jordan
On April 13, 20
OK - I found it. How do I build it so that the generated files get correctly
placed in the source tree? I don’t see an ant task for it.
-Jordan
On April 13, 2015 at 1:53:08 PM, Hongchao Deng (fengjingc...@hotmail.com) wrote:
Those are generated by the jute compiler. Source file:
https://git
Those are generated by the jute compiler. Source file:
https://github.com/apache/zookeeper/blob/trunk/src/zookeeper.jute
- Hongchao Deng
> Date: Mon, 13 Apr 2015 13:47:09 -0500
> From: jor...@jordanzimmerman.com
> To: ph...@apache.org; dev@zookeeper.apache.org
> CC: mi...@cs.stanford.edu
> Subjec
How are things such as Create2Request et al generated? I see the comment that
it’s the Hadoop compiler but I don’t see the source files anywhere. Is it OK to
manually create these (for new classes) or am I missing some source?
-Jordan
On April 10, 2015 at 6:40:23 PM, Patrick Hunt (ph...@apach
FYI
https://issues.apache.org/jira/browse/ZOOKEEPER-2163
On Fri, Apr 10, 2015 at 6:39 PM, Patrick Hunt wrote:
> Adding is typically good from a b/w compact perspective. If you use the new
> feature (at runtime) it generally precludes rollback though.
>
> See CreateTxn and CreateTxnV0
>
> A bit o
Jordan Zimmerman created ZOOKEEPER-2163:
---
Summary: Introduce new ZNode type: container
Key: ZOOKEEPER-2163
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2163
Project: ZooKeeper
I
Once something is generally available, embedded and easy to enable, it
probably won't take much for someone to extend. Once they see the benefits.
Although there are already folks interested in what we have today.
We could do the same thing re thrift, or any other "plugin" for that
matter, (enable
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https://issues.apache.org/jira/browse/ZOOKEEPER-2147?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tom Distler updated ZOOKEEPER-2147:
---
Attachment: ZOOKEEPER-2147.patch
Granted: ASF license consistent with current ZooKeeper li
Yes ok agreed. I do personally think fully supporting TTL nodes (and
long-poll based watches) for purposes of enabling the same types of
high-level behaviors as etcd/consul would probably be useful, as per the
original start of this epic thread. But even starting with an embedded
proxy is a good st
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ram yadav commented on ZOOKEEPER-1626:
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We are running zookeeper C client along w
We already have a proxy. My thought was to take advantage of jetty now
being embedded in ZK (3.5+) so that a proxy wouldn't be necessary.
Patrick
On Mon, Apr 13, 2015 at 10:39 AM, Camille Fournier
wrote:
> I've lost the thread now. Are we talking about inside of the ZK servers
> themselves, or
I've lost the thread now. Are we talking about inside of the ZK servers
themselves, or as a proxy in front of them?
On Mon, Apr 13, 2015 at 1:35 PM, Jordan Zimmerman <
jor...@jordanzimmerman.com> wrote:
> I agree that get/set kinds of things is useful - especially for OPs
> groups. What if ZK had
Yes, pluggable is what I had in mind. My thought was that now that jetty is
embedded it shouldn't be too hard to allow the REST to be registered
dynamically via config.
Patrick
On Mon, Apr 13, 2015 at 10:35 AM, Jordan Zimmerman <
jor...@jordanzimmerman.com> wrote:
> I agree that get/set kinds of
I agree that get/set kinds of things is useful - especially for OPs groups.
What if ZK had some sort of pluggable server support? Ops folks could plug in a
simple REST server, others could plug in a Thrift server, etc.
On April 13, 2015 at 12:31:51 PM, Patrick Hunt (ph...@apache.org) wrote:
I
I think it depends on the use case. I've had a number of folks asking for
the REST support, in those cases I think they are mainly interested in
active participation (get/set rather than watches/ephemerals).
The SPEC page has all the details on what the REST proxy currently supports.
Patrick
On
Awesome! Is there any design docs and related code to read?
I'm not very sure. The proxy is more like a client to ZooKeeper. I'm thinking
in terms of ZK server RPC api.
- Hongchao Deng
> Date: Mon, 13 Apr 2015 11:57:45 -0500
> From: jor...@jordanzimmerman.com
> To: fengjingc...@hotmail.com; dev@
Hongchao, as I mentioned before I wrote an RPC proxy for Curator that exposes
all the ZooKeeper APIs and all the Curator APIs and recipes. This proxy uses
Thrift and writing clients is actually very easy and natural as Thrift
generates native APIs.
http://curator.apache.org/curator-x-rpc/index.
Hi Jordan, I can share some thoughts on this.
I think it's not easy to write client in other languages because the client
connection is stateful. It contains information of watches, session, etc. Even
if the server exposes RPC, REST, it's still a lot of work to write a client. I
think making cli
@Flavio, Cool, thanks for the info. I will take a look at the JIRA.
- Hongchao Deng
> Date: Mon, 13 Apr 2015 10:33:40 +
> From: fpjunque...@yahoo.com.INVALID
> To: dev@zookeeper.apache.org
> Subject: Re: design thoughts: node TTLs
>
> Yeah, I agree with Camille, there seems to be some sensiti
How does the current REST code handle watches and background notifications? Are
clients required to poll periodically? This is really RPC and REST is not ideal
for RPC. So, as I mentioned before, I think the ZK team should consider a real
RPC system like Thrift instead of REST.
-Jordan
On Ap
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Hadoop QA commented on ZOOKEEPER-2156:
--
-1 overall. Here are the results of test
Jira: https://issues.apache.org/jira/browse/ZOOKEEPER-2156
Build: https://builds.apache.org/job/PreCommit-ZOOKEEPER-Build/2632/
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J.Andreina updated ZOOKEEPER-2156:
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Attachment: ZOOKEEPER-2156.4.patch
> If JAVA_HOME is not set zk startup and fetching status
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J.Andreina commented on ZOOKEEPER-2156:
---
Thanks [~rakeshr] for reviewing the pat
See https://builds.apache.org/job/ZooKeeper-trunk/2659/
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[exec] ZooKeeper JMX enabled by defau
See https://builds.apache.org/job/ZooKeeper-trunk-jdk8/351/
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[junit] 2015-04-13 11:44:20,794 [m
See https://builds.apache.org/job/ZooKeeper_branch35_jdk7/263/
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[junit] 2015-04-13 10:57:46,378
Yeah, I agree with Camille, there seems to be some sensitiveness around the
topic, even though this thread seems to be a simple exercise of understanding
what is out there.
Performing periodic verifications of the txn log CRCs enables one to detect
latent errors earlier, but I'm not sure what y
See https://builds.apache.org/job/ZooKeeper-trunk-solaris/1000/
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Started by timer
Building remotely on solaris1 (Solaris) in works
See https://builds.apache.org/job/ZooKeeper-trunk-WinVS2008/1752/
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[javacc] File "SimpleCharStream.
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