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From Patrick Hunt <ph...@apache.org>
Subject Re: Xid out of order. Got 8 expected 7
Date Wed, 12 May 2010 18:51:49 GMT
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
>
> 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 - 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
>>> getChildren (xid 7) got lost.
>>>
>>> Patrick
>>>
>>> On 05/12/2010 11:30 AM, Jordan Zimmerman wrote:
>>>
>>>> Oh, OK. When I get a moment I'll restart the 3.2.2 and post logs,
>>>> etc.
>>>>
>>>> Yes, we're calling getChildren with the callback.
>>>>
>>>> -JZ
>>>>
>>>> On May 12, 2010, at 11:28 AM, Patrick Hunt wrote:
>>>>
>>>>
>>>>> 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't be they type of problem with
>>>>> this configuration as you describe. I'd still be interested for you
>>>>> to create that jira.
>>>>>
>>>>> Regards,
>>>>>
>>>>> Patrick
>>>>>
>>>>> On 05/12/2010 11:23 AM, Jordan Zimmerman wrote:
>>>>>
>>>>>> 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
>>>>>>> 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 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 10:59 AM, Mahadev Konar wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>>> 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"<jzimmerman@proofpoint.com>    wrote:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> 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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