Yes. That is roughly what I mean.
If one server starts a GC, it can effectively go offline. That might
pressure the other servers enough that one of them starts a GC.
This is unlikely with your GC settings, but you should turn on the verbose
GC logging to be sure.
On Wed, May 12, 2010 at 10:09
On 05/12/2010 08:30 PM, Aaron Crow wrote:
I may have a better idea of what caused the trouble. I way, WAY
underestimated the number of nodes we collect over time. Right now we're at
1.9 million. This isn't a bug of our application; it's actually a feature
(but perhaps an ill-conceived one).
A m
Hi Ted, yeah it's a big number, eh? We're essentially using Zookeeper to
track the state of cache entries, and currently we don't bound our cache. I
didn't realize how many entries we grow to over a long period of time, until
I started counting nodes in Zookeeper. But, sorry, I'm not sure what you
Impressive number here, especially at your quoted "few per second" rate.
Are you sure that you haven't inadvertently synchronized GC on multiple
machines?
On Wed, May 12, 2010 at 8:30 PM, Aaron Crow wrote:
> Right now we're at
> 1.9 million. This isn't a bug of our application; it's actually a
I may have a better idea of what caused the trouble. I way, WAY
underestimated the number of nodes we collect over time. Right now we're at
1.9 million. This isn't a bug of our application; it's actually a feature
(but perhaps an ill-conceived one).
A most recent snapshot from a Zookeeper db is 22
Anyone interested in using Cages and ZooKeeper with NoSQL databases might
like new blog post
http://ria101.wordpress.com/2010/05/12/locking-and-transactions-over-cassandra-using-cages/
On 12 May 2010 00:02, Dominic Williams wrote:
Anyone looking for a Java client library for ZooKeeper, please c
Hm, if you don't mind enter that jira, would still like to verify by
looking at the logs.
Patrick
On 05/12/2010 11:52 AM, Jordan Zimmerman wrote:
So, I'm off the Jira hook then?
-JZ
On May 12, 2010, at 11:49 AM, Patrick Hunt wrote:
You're right. Ben, would you mind entering a JIRA?
Patric
So, I'm off the Jira hook then?
-JZ
On May 12, 2010, at 11:49 AM, Patrick Hunt wrote:
> You're right. Ben, would you mind entering a JIRA?
>
> Patrick
>
> On 05/12/2010 11:41 AM, Benjamin Reed wrote:
>> is this a bug? shouldn't we be returning an error.
>>
>> ben
>>
>> On 05/12/2010 11:34 AM
I think Ben meant that the unknown operation itself (from server
perspective) should result in an error directly on both client and server.
Patrick
On 05/12/2010 11:45 AM, Jordan Zimmerman wrote:
Technically, there is an error generated. IMO - a more descriptive error would
be helpful.
-JZ
You're right. Ben, would you mind entering a JIRA?
Patrick
On 05/12/2010 11:41 AM, Benjamin Reed wrote:
is this a bug? shouldn't we be returning an error.
ben
On 05/12/2010 11:34 AM, Patrick Hunt wrote:
I think that explains it then - the server is probably dropping the new
(3.3.0) "getChild
Technically, there is an error generated. IMO - a more descriptive error would
be helpful.
-JZ
On May 12, 2010, at 11:41 AM, Benjamin Reed wrote:
> is this a bug? shouldn't we be returning an error.
>
> ben
>
> On 05/12/2010 11:34 AM, Patrick Hunt wrote:
>> I think that explains it then - th
is this a bug? shouldn't we be returning an error.
ben
On 05/12/2010 11:34 AM, Patrick Hunt wrote:
I think that explains it then - the server is probably dropping the new
(3.3.0) "getChildren" message (xid 7) as it (3.2.2 server) doesn't know
about that message type. Then the server responds to
I think that explains it then - the server is probably dropping the new
(3.3.0) "getChildren" message (xid 7) as it (3.2.2 server) doesn't know
about that message type. Then the server responds to the client for a
subsequent operation (xid 8), and at that point the client notices that
getChildr
I'm still interested though... Are you using the new "getChildren" api
that was added to the client in 3.3.0? (it provides a Stat object on
return, the old getChildren did not). While we don't officially support
3.3.0 client with 3.2.2 server (we do support the other way around),
there shouldn'
Apologies...
I thought I was running 3.3.0 server, but was running 3.2.2 server with 3.3.0
client. I upgraded the server and now all works again. Sorry to trouble y'all.
-Jordan
On May 12, 2010, at 11:11 AM, Patrick Hunt wrote:
> Hi Jordan, you've seen this once or frequently? (having the serv
Hi Mahadev,
Thanks for your interest.
We currently use Cages to apply locking where necessary in our operations
against the Cassandra database, to manage node membership of an in-house
clustered distributed platform called Starburst, and soon for maintaining
centralized configuration for those St
Hi Patrick,
Internally, ZkMultiLock constructs single path ZkReadLock and ZkWriteLock
objects to handle the lock paths you add to it. These work in a similar way
to that described in the ZooKeeper recipes.
If you only add a single lock path to ZkMultiLock, then when you try and
acquire() it behav
Hi Jordan, you've seen this once or frequently? (having the server +
client logs will help alot)
Patrick
On 05/12/2010 11:08 AM, Jordan Zimmerman wrote:
Sure - if you think it's a bug.
We were using Zookeeper without issue. I then refactored a bunch of
code and this new behavior started. I'm
Sure - if you think it's a bug.
We were using Zookeeper without issue. I then refactored a bunch of code and
this new behavior started. I'm starting ZK using "zkServer start" and haven't
made any changes to the code at all.
I'll get the logs together and post a JIRA.
-JZ
On May 12, 2010, at 1
Hi Jordan,
Can you create a jira for this? And attach all the server logs and client
logs related to this timeline? How did you start up the servers? Is there
some changes you might have made accidentatlly to the servers?
Thanks
mahadev
On 5/12/10 10:49 AM, "Jordan Zimmerman" wrote:
> We've
We've just started seeing an odd error and are having trouble determining the
cause.
"Xid out of order. Got 8 expected 7"
Any hints on what can cause this? Any ideas on how to debug?
We're using ZK 3.3.0. The error occurs in ClientCnxn.java line 781
-Jordan
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