Hi Gordon,
Thanks a lot for the help.
Best Regards,
Sergey Zhemzhitsky
Information Technology Division
Troika Dialog, 4, Romanov lane, Moscow 125009, Russia
Phone. +7 495 2580500 ext. 1246
Gordon Sim
18.04.2011 19:52
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Sub
Hi there,
According to the
http://qpid.apache.org/books/0.8/Programming-In-Apache-Qpid/html/ch02s14.html
we can configure a client failover by means of the following snippet of
code
Connection connection("localhost:5672");
connection.setOption("reconnect", true);
try {
connection.open();
Hi there,
Sorry for so long answer.
We are planning to use the MRG Messaging with the latest updates, so the
problem may disappear.
For now I've raised the JIRA issue
https://issues.apache.org/jira/browse/QPID-3189 with minor priority
because such a behavior is hardly reproducable.
Best Rega
Hi Alan,
Thanks for information,
>From you message I understood that queue policy error can occur due to
previous errors with persistent store, for example, queue policy is
incremented and just after that the error occurs when trying to persist a
message.
Best Regards,
Sergey Zhemzhitsky
Hi Alan,
I thought that such tests should have already been done.
Unfortunately I don't have enough time to do it right now so I try to do
it later.
Best Regards,
Sergey Zhemzhitsky
Alan Conway
31.03.2011 17:07
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sergey_z
Hi there,
I would like to have a reliable single broker system and I wonder is there
any dirrerence in performance and reliability between a single exchange
with multiple binding keys and multiple exchanges with single binding key?
What is more reliable, a single exchange with multiple binding
Hi there,
I'm using qpid 0.8 and sending only durable messages.
>From time to time the following exceptions can occur:
1. Journal "MyQueue": get_events() returned JERR_JCNTL_AIOCMPLWAIT;
wmgr_status: wmgr: pi=29 pc=44 po=0 aer=32 edac:TFFF
ps=[] wrfc: state: Act
Marnie, Rajith thanks a lot.
We try to omit to use transactions because of performance penalty. To
achieve the maximum performance and have our messages guaranteed delivered
we have the following configuration:
1. cluster of two qpid brokers
2. all queues are cluster-durable
3. all messages ar
Hi there
I'm working with qpid 0.8 by means of JMS API and I'm using
CLIENT_ACKNOWLEDGE mode to get higher performance comparing to
transactinal processing.
As a rule performance is rather pure in both cases. In transactional mode
I can receive about 1.6K messages per second, in CLIENT_ACKNOWLE
We have to replay all the data which is some kind of deals, and the most
recent deals must be processed in the first place, so LVQ seems not to fit
our needs.
Best Regards,
Sergey Zhemzhitsky
Gordon Sim
03.03.2011 11:39
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Hi Gordon,
We have a queue with market data, sometimes we need to resend all the data
and we would like to process the most recent data earlier in that case.
Best Regards,
Sergey Zhemzhitsky
Gordon Sim
02.03.2011 19:12
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Hi Gordon,
Maybe I have not properly understood LVQ. I thought that LVQ allows to
read messages in reverse order. It is a nice feature to have, so that we
will be able to read the most recent messages in the first place.
Best Regards,
Sergey Zhemzhitsky
Gordon Sim
02.03.2011 16:14
Please
Hi there,
I have some questions regarding message ordering. Could you please help?
1. Is it possible to read messages from the queue in reverse order to get
the most recent messages?
2. If queue is declared as LVQ is it possible to use durable messages in
the latest version of qpid?
3. Is it po
Alan, thanks a lot.
It's more clearer now.
Best Regards,
Sergey Zhemzhitsky
Alan Conway
01.03.2011 00:25
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Subject
Re: QPID Clustering
On 02/28/2011 10:58 AM, sergey_zhemzhit...@troika.r
Hi Alan, thanks for support
>> I'm not familiar with stonish.
Sorry for mistyping, I have meant stonith.
So, does it make sense to use cman instead of corosync in case of two-node
cluster? Are there any benefits in using cman?
Best Regards,
Sergey Zhemzhitsky
Information Technology Division
Tr
Hi there,
I'm using MRG 1.3 and I have the following questions regarding qpid
clustering?
1. Is it possible to use quorum, fencing, stonish if I'm using a messaging
cluster (
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_MRG/1.3/html/Messaging_Installation_Guide/chap-Messaging_Installati
Alan, thanks a lot.
I will give it a try.
Best Regards,
Sergey Zhemzhitsky
Alan Conway
24.02.2011 18:02
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Subject
Re: Building qpid 0.8 with clustering on RHEL 6
On 02/24/2011 02:04 AM, s
Hi Chris,
I'm afraid of using corosynclib-devel-1.2.0 for building qpid that will be
used with corosynclib-1.2.3, because of possible incompatibility, so I
prefer to build corosync-1.2.3 additionally.
Finally I have managed to find that selinux was the problem although
corosync was from the di
Hi Alan,
Thanks for response.
There is no corosynclib-devel in the RHEL 6 distribution.
Both qpid and corosync are started as services, so SELinux must not bring
any problems.
And firewall allows all traffic.
As I have mentioned the problem occurs only after reboot, and services are
started m
Hi there,
I'm trying to build qpid 0.8 with support of clustering on the RedHat
Enterprise Linux 6.
For the clustering support to be available it is necessary corosync
headers and object files to be available, but in there are only
corosync_1.2.3-21.el6.x86_64.rpm, corosynclib_1.2.3-21.el6.x86_
Thanks a lot for help.
Best Regards,
Sergey Zhemzhitsky
Alan Conway
09.02.2011 17:40
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Re: Qpid: cluster-durable queues
On 02/08/2011 01:47 AM, sergey_zhemzhit...@troika.ru wrote:
Alan, thanks for help.
Best Regards,
Sergey Zhemzhitsky
Alan Conway
09.02.2011 17:36
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Re: QPID 0.8: Time callback overran
On 02/08/2011 02:40 AM, sergey_zhemzhit...@troika.ru wrote
Hi there,
I'm using qpid 0.8 c++ broker and java client.
In the log I have a lot of messages like these
Feb 7 11:01:24 cto-sandbox qpidd[10157]: 2011-02-07 11:01:24 warning
JournalInactive:MyQueue timer callback overran by 7ms [taking 14000ns]
Feb 7 11:01:25 cto-sandbox qpidd[10157]: 2011-02-0
Carl, thanks a lot.
Could you provide me with links to read more about cman and quorum
manager?
Best Regards,
Sergey Zhemzhitsky
Carl Trieloff
07.02.2011 16:56
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Re: Qpid: cluster-durable queues
yes, that
Hi Gordon,
So, if a queue is --durable, no persistent messages will be lost.
If the queue is --durable and --cluster-durable all non persistent
messages will become persistent when only one node of the cluster remains.
Is my understanding of --cluster-durable option correct?
Best Regards,
Ser
Gordon,
I completely agree about filtering.
At least now I understand what they are for. Thanks a lot.
Best Regards,
Sergey Zhemzhitsky
Gordon Sim
04.02.2011 13:22
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Re: QPID Reliability
On 02/04/2011 09:32
Hi Alan,
First of all thanks for helping to understand the meaning of these queues.
How long the broker will keep those queues? Because if they exist until
the broker restarts, it will be difficult to find a concrete queue because
of amount of _@amq.failover_.
Best Regards,
Sergey Zhem
Hi Carl,
I want my queue to become durable when only one node in the cluster stands
alive. I believe this is what the --cluster-durable option is for.
Best Regards,
Sergey Zhemzhitsky
Carl Trieloff
03.02.2011 17:36
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Sub
Hi there,
I'm using qpid 0.8 and I'd like to use cluster durable queues.
Here is my test case:
1. Start a cluster that contains two nodes.
2. Create cluster durable queue: qpid-config add queue MyQueue
--cluster-durable
3. Kill one node by means of kill -9
4. Restart qpid on the second node
5.
Jonathan, thanks for help.
Those are queues, not exchanges.
There are a lot of queues like that
_@amq.failover_54cb1666-c325-472b-9b83-1bececd2f0a8 when I'm executing
qpid-stat -q.
It seems that they are created automatically?
When client starts for the first time there are no such queues.
By the way, I'm using qpid 0.8.
Best Regards,
Sergey Zhemzhitsky
sergey_zhemzhit...@troika.ru
03.02.2011 12:31
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QPID Reliability
Hi there
I'm testing reliability of my application
Connection Factory URL: a
Hi there
I'm testing reliability of my application
Connection Factory URL: amqp:
//guest:guest@/?brokerlist='tcp://host1:5672?tcp_nodelay='true';tcp://host2:5672?tcp_nodelay='true''&failover='failover_exchange'&connectdelay='5000'&retries='10'
Queue URL: BURL:direct://MyExchange//MyQueue?routing
It's interesting to know.
I will investigate this issue if I have more time.
Thanks for help.
Best Regards,
Sergey Zhemzhitsky
Ted Ross
02.02.2011 17:02
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Re: Delete all the messages from a queue.
Interestin
The issue was in a remaining subscriber. When I killed it I was able to
purge my queue.
Best Regards,
Sergey Zhemzhitsky
sergey_zhemzhit...@troika.ru
02.02.2011 10:20
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Re: Delete all the messages from a queue.
Ted, sessions are not transactional.
It seems that the only way is to recreate queue.
Is it possible to get amount of messages or get all the messages by means
of plain qpid API even if there are transactional sessions?
Best Regards,
Sergey
Ted Ross
01.02.2011 18:27
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use
Hi Gordon,
I'm not able to reproduce such a behavior on another environment.
When I'm trying to execute call purge 0, the command executes
successfully and there aren't exceptions in the log file. However "show
" and "qpid-stat" show that some messages remain.
Best Regards,
Sergey Zhemzhitsk
Here is the command I have used
qpid-config --durable --file-count 128 --file-size 32 add queue MyQueue
Best Regards,
Sergey Zhemzhitsky
Gordon Sim
01.02.2011 18:13
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Re: Delete all the messages from a queue.
Hi Jonathan,
I have tried all the ways to get a valid number of messages but without
success.
qpid-stat and qpid-tool return the same number of messages that is not 0.
If I try to browse the queue by means of HermesJMS there are no messages
in the queue.
Best Regards,
Sergey Zhemzhitsky
Well, queue seems to be empty, because I can't read a message from it.
Does anybody know how make qpid-tool and qpid-stat return an appropriate
information?
Here is output of the qpid-stat command
Queues
queue dur autoDel excl msg
msgIn msgOut
Hi there,
Is there any guaranteed way to remove all the messages from a queue?
I'm using MRG 1.3, and I have tried the following way:
qpid-tool
qpid: list
qpid: list queue
qpid: call queue-id purge 0
quit
but without success.
Could you please tell where the problem could be? And what to p
Pete, if you need only client to be OSGi-fied take a look here
http://repo1.maven.org/maven2/org/apache/servicemix/bundles/org.apache.servicemix.bundles.qpid/0.8.0_1/
The following feature for the Apache Karaf should work just fine (please
let me know if not):
mvn:edu.emory.mathcs.backpor
Gordon,
Thanks for such a detailed answer. It's much clearer now.
Best Regards,
Sergey Zhemzhitsky
Gordon Sim
26.01.2011 15:06
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Re: Differences between AMQP 0.10 and AMQP 1.0
On 01/26/2011 06:57 AM, sergey
Hi there,
I'm using qpid 0.6 and AMQP 0.10. Not so far ago we decided to migrate to
the latest version of qpid, which currently is 0.8.
I have looked through the AMQP 1.0 specification and discovered that it's
completely different from the previous one.
I wonder what is the analog of the exchang
Ted thanks a lot.
As far as I understand 'subject' is more preferable to use, because there
are no routing keys in the AMQP 1.0. There are filters instead. Am I
right?
Best Regards,
Sergey Zhemzhitsky
Ted Ross
25.01.2011 22:20
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Hi there,
According to following link
http://qpid.apache.org/books/0.8/Programming-In-Apache-Qpid/html/ch02s04.html#id3068029
subjects can be used to direct messages to different destinations. Routing
and binding keys can used for the same purpose. So what is the difference
between subjects a
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