rabbitmq-discuss Google Group

rabbmitmq - app hangs while calling login user method...

2013-05-25T08:55:07Z

using this library for ios rabbitmq client
integration: [link]

here is an iOS - obj C code:

-(void)establish{

AMQPConnection *connection = [[AMQPConnection alloc] init];

NSError *error, *error1,*error2,*error3;

[connection connectToHost:<hostname> onPort:<portno> error:&error] ?

[dotnet-client] Help mocking IModel.BasicPublish

2013-05-24T16:02:12Z

Hello,

I'm writing unit tests for the various components in my application, some
of which interface with a RabbitMQ broker.

I've managed to successfully implement reading from a mocked call to
IModel.BasicConsume() and acknowledging with IModel.BasicAck() but am stuck
on IModel.BasicPublish(), in particular mocking the ack/nack mechanism with

Re: [rabbitmq-discuss] Naming RabbitMQ nodes with complete domain names

2013-05-23T23:37:17Z

Hi there.....I know this is old thread, but I'm having the same
problem.....the thing is that I'm trying to build a cluster on amazon ec2.
there, there is no domain and the machines only have a hostname of the form
ip-0-0-0-0. everything works fine for one node (and erlang starts with
-name rabbit@ip-x-x-x-x), but when i try to join cluster to another node,

Re: channel.basicCancel hangs

2013-05-22T01:19:36Z

I found the problem... I had a message that was not ack.. so now before
closing the channel I ack the msg.

Re: channel.basicCancel hangs

2013-05-21T23:52:45Z

Updated to amqp-client 3.1.0 but still same problem.

Tried to close channel instead od basicCancel.. same problem.

channel.basicCancel hangs

2013-05-21T23:02:59Z

<dependency>
<groupId>com.rabbitmq</groupId >
<artifactId>amqp-client</artif actId>
<version>3.0.4</version>
</dependency>

RabbitMQ 3.0.2, Erlang R16A

I have a webpage that has a start button and a stop button.
These to buttons should start and stop the consuming messages.

When the user presses start button the consuming starts... when the user

Mirrored queue performance factors

2013-05-21T19:12:41Z

Hi,

We operate two dual-node brokers, each broker having quite different queues
and workloads. Each box has 24 cores (H/T) worth of Xeon E5645 @ 2.4GHz
with 48GB RAM, connected by Gigabit LAN with ~150μs latency, running RHEL
5.6, RabbitMQ 3.1, Erlang R16B with HiPE off. We've tried with HiPE on but

Re: [rabbitmq-discuss] Eager sync

2013-05-20T18:42:48Z

With eager sync enabled, queues will block (i.e., become unresponsive) when a new mirror/slave joins, whilst the slave is synchronised.

It will only happen if you *do* explicitly set ha-sync-mode to automatic, or manually call 'sync' via rabbitmqctl.

Cheers,
Tim

Eager sync

2013-05-20T13:56:30Z

There is a new feature in rabbitmq 3.1.0 - eager synchronization.
What is this eager synchronization in detail?
Should I explicitly set eager sync policy?

More throughput using cluster

2013-05-18T07:34:27Z

Hi all,

In case we have 2 or more rabbitmq nodes connected in cluster and each with
VIP assigned, would we get more throughput if messages are sent on all
nodes (using round-robin method) and received by workers connected on each
node.

If cluster is not goot way to get more throughput using additional rabbitmq

Failed to start rabbitmq-server

2013-05-18T05:26:18Z

*Hi, all,*

*I've been trying to install rabbitmq (ver 3.1.0) on my own vps ( linux
distribution: debian, x86) for a long time, but I just failed again and
again.*
*
*
*First, I'd like to show the error message I got:*

root@XXX:~/code# /etc/init.d/rabbitmq-server start
[warn] Starting message broker: rabbitmq-server[....] FAILED - check

Strange subtract_acks crash in RabbitMQ 3.1.0-1 (case_clause empty) on EC2

2013-05-18T03:20:01Z

Hi,

I am running a RabbitMQ cluster of 4 nodes in AWS EC2 on *c1.xlarge *instances
using Ubuntu 12.04 LTS (kernel 3.2.0-38). Periodically two of my nodes
holding the largest queues will crash and require me to restart the
rabbitmq-server service. Looking at the logs, I'm at a loss as to why the

Expected msg/s per CPU core

2013-05-17T20:44:09Z

Hello,

What is expected value of consumed msg/s per CPU code running at 2.4GHz?

We're using 4 core VM running only RabbitMQ. When under load of about
500msg/s, IDLE is only about 50%. This sounds like far away from high
performance, since we're expecting much much more msg/s :(

There is enough RAM, about 30-35 connections are reported, 32 channels, 61

Recovering an 3-node cluster after power failure

2013-05-17T19:32:26Z

Hi All,

I have a three node cluster running on VMs for testing purposes:
node1 (disk)
node2(disk)
node3(ram)

Today we had a power outage and all the nodes went down at once. I am
having a serious issue recovering from this because node1 thinks it belongs
to a cluster but node3 disagrees. I can not seem to do anything at all

Channel versus Connection shutdown

2013-05-16T19:26:40Z

Are channels ever shutdown independent of connections? If so, what would
cause a channel to be involuntarily shutdown while the connection remains?
Is there any way to test for this scenario by forcefully closing a channel
(I don't see anything on the server console)?
Thanks,
Josh

HTTP API Callback

2013-05-15T14:38:52Z

Hi,

Just wondering if there is a way RabbitMQ can send messages to a rest based
API, for example I have an application that publishes a message to RabbitMQ
when a certain action is performed, would RabbitMQ then be able to
automatically send that message to another endpoint e.g.
[link]

Trace on specific queues

2013-05-15T12:22:48Z

Hello -
I'm trying to trace messages flowing through a set of queues in a given vhost. These queues start with a naming convention of app.module.xxx. I've tried different patterns suggested on the trace screen (web admin) but nothing except for "#" works. Could someone provide a pattern for setting up trace on queues matching the naming conv above?

Re: Flow control issue when shovelling messages between data centres

2013-05-15T09:48:43Z

It appears that part of the problem is that the shovel mechanism is slow to
consume due to a load balancer issue which I won't go into here.

I'd be interested though to understand better the relationship is between
down-stream queue size / consumption rate and flow control. For example, if

question about rabbitmq http api basic auth

2013-05-15T02:32:24Z

Hello. I have a question about rabbitmq http api basic auth.

I use rabbitmq v3.1.0 and my code is below.

--
package com.foo.bar.controller;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URLEncoder;

import javax.servlet.http.HttpServlet Request;

.NET Client Connection.CreateModel Possible Deadlock / Not Thread Safe?

2013-05-14T16:56:42Z

Hi All,

Server version: 3.0.4
.NET client version: 3.0.4

I have had a problem on my Production servers this week where it looks like
the call to CreateModel on IConnection is not thread safe, despite the
documentation indicating that the entire IConnection should be thread safe.
My application runs a single shared connection with somewhere in the region

Flow control issue when shovelling messages between data centres

2013-05-14T16:50:06Z

We have a rabbit cluster in our existing data centre (call it DC1). This
cluster has messages (fairly large in size - around 100K) being published
to it at a rate of between 500 to 1000/s.

Recently, we introduced a new data centre with its own rabbit cluster
(DC2). Our intention is to shovel messages that originate in DC1 to DC2 and

Production cluster fun, make that not so fun (production cluster setup guidance)!

2013-05-14T04:52:08Z

What is the ideal setup for our production cluster, currently we have two
ABs with two nodes in each, after setting pause_minority today and having a
partition where all nodes were paused, we changed to autoheal and restarted
all nodes. In the midst of this something happened, and even rolling back

persistent connections on rabbitmq-server when android client losses internet connection

2013-05-11T12:08:20Z

Hello

I have a question about about connections to server from java client. I'm
developing a Android application using rabbitmq-java-client library. I
followed the tutorials on the rabbitmq website, so I created a
ConnectionFactory with my own ip address (without any timeout or
heartbeat), then called newConnection(). Everything works fine, sending and

Re: Queues no longer expire in RabbitMq 3.1.0

2013-05-10T15:09:23Z

As advised, I've just tested this in the nightly build 3.1.0.40510 on my
OpenSuse box and the bug seems to be fixed. Thanks a lot guys.

Problem with rabbimq-server 3.1.0 and rabbitmq_web_stomp_examples

2013-05-10T12:32:12Z

Hi,

I installed my rabbitmq-server without problems. I can enable or disable
some pluglins, but when I enable rabbitmq_web_stomp_examples, I can restart
my rabbitmq. When I try to restart, says fail.

The logs files:

*startup_log*

BOOT FAILED
===========

Error description:
{error,{"no such file or directory","rabbitmq_mochiweb. app"}}

Re: Queues no longer expire in RabbitMq 3.1.0

2013-05-10T09:49:25Z

Nah, there is more there than meets the eye. I've got durable expirable
queues, holding several messages, that don't want to go away. There is
definitely something screwy there.

[java-client] Is there a full working example of "DefaultConsumer" without deprecated QueueingConsumer ?

2013-05-10T08:48:54Z

Hi everyone,

I'm a RabbitMQ newbie. I try some code with the java client. Offical site
tutorial codes are just fine with QueueingConsumer. But then I saw this at
javadoc:

QueueingConsumer is now deprecated in favour of implementing Consumer

Then I saw an example usage at api guide<[link]>

Re: [rabbitmq-discuss] Cannot start rabbitmq

2013-05-10T08:29:15Z

What specific package are you using?

Cannot start rabbitmq

2013-05-10T01:17:11Z

Hi,

I installed Rabbit OSX version of 3.1.0 and I am getting the following
error when starting up the server:

$ ./rabbitmq-server
usage: dirname path
./../erts-5.10.1/bin/erl: line 29: /../../erts-5.10.1/bin/erlexec : No such
file or directory
./../erts-5.10.1/bin/erl: line 29: exec: /../../erts-5.10.1/bin/erlexec :

Using a VIP address for Clients Connecting to 3.1.0

2013-05-09T22:55:17Z

Hi I am setting up a Rabbit MQ installation for HA. I am using clustering
and active/active mirroring for HA.

My Current Setup is two nodes that are set to mirror each other. I want to
use a VIP address for my clients to connect to.

I am not clear on how to configure the VIP. To me it appears that prior to

Re: Cluster not running - getting Error: {cannot_discover_cluster,"The nodes provided are either offline or not running" error

2013-05-09T19:54:35Z

if you can resolve the hostnames from node1<-->node2
and you can telnet between the two nodes to port 4369
then perhaps you forgot to set the erlang_cookie to the same value on both
nodes

Hope this helps.

Re: Queues no longer expire in RabbitMq 3.1.0

2013-05-09T09:46:07Z

Here is a bit more info on the subject. Ran some tests and apparently the
queues seem to expire if they've been declared as durable after all the
consumers dropped. Apart from my initial report, the setting is also
ignored if they've been declared as auto-delete, which sort of makes sense
(in this case they get deleted immediately).

RabbitMQ Flow Control Behavior Questions

2013-05-08T19:05:34Z

Hi,

I am using 3.0.4 Java client library/RabbitMQ server and have some
questions about RabbitMQ flow control behavior.

1. What is the recommended way of handling/detecting flow control
invocations on the client side? Is it possible to detect that flow control
has been invoked on the RabbitMQ server by adding FlowListener or any other

RabbitMQ 3.1.0 LDAP plugin help

2013-05-08T13:50:38Z

I'm trying to get the LDAP plugin to work. At this point, it does not log
when "log" is set to "true" or "network", so I've been using tcpdump.

Anyways, I'm trying to take what I use in PHP/Zend
(Zend_Auth_Adapter_Ldap):

using Rabbit MQ to send messages directly from Oracle 10g Database

2013-05-08T05:33:04Z

I have a requirement to send messages to a rabbit mq queue directly from an
oracle 10g database. The database uses v1.4 of the Java VM and i am having
troubles loading the rabbit mq client into the Oracle JVM. I am using v2.2
for java 1.4 of the Rabbit Client.

The errors i am getting when using the loadjava command in oracle are

ha-sync-mode policy is NOT recognized

2013-05-08T02:01:10Z

Hi there.
I'm trying to set up auto synching on my RabbitMQ cluster with mirrored
queues however when running particular command as per documetation
([link]) I'm getting the error that this policy is
NOT recognized:

$ sudo rabbitmqctl set_policy -p my_vhost HA '^(?!amq.).*' '{"ha-mode": "all", "ha-sync-mode": "automatic"}'

Re: Hanging connections in management interface (v3.0.4)

2013-05-07T18:05:02Z

We are running RabbitMQ *2.8.7* on Erlang *R14B04 and see similar
behavior. Usually around the same time as network glitches. We use an F5
load balancer that we believe is keeping the connection open even though
the client was (sometimes forcefully) severed. We either Force the
connection closed through API, or just let it sit long enough that the

RabbitMQ 3.1.0 : LDAP Plugin

2013-05-07T13:08:16Z

I'm unable to get the ldap plugin to log any debug information.

Current configuration:

<snip>
{servers, ["ldap.example.com"]},
{dn_lookup_attribute, "sAMAccountName"},
{dn_lookup_base, "DC=example,DC=com"},
{other_bind, {"example\\\ldapadmin", "mypasswd"}},
{use_ssl, false},
{port, 389},

topic for rabbitmq

2013-05-07T11:39:29Z

Hi,all,

Background: now client produces many messages of different
labels.Consumers may subscribe some labels of them(different consumer need
different labels's msgs).
Now method: I used direct exchange in *rabbitmq*, consumer declared queue
for itself, exchange distribute msgs to these queues.

Queues no longer expire in RabbitMq 3.1.0

2013-05-07T11:24:08Z

Declaring a queue with "x-expires" set to a valid value has no effect after
the consumers disconnect. The admin interface reports the queue being idle
with no consumers present.

They used to expire in earlier versions. Are there additional requirements
now to achieve the same behavior?

Re: Bug/Behavior Change in binds to header exchanges in rabbitmq 3.1.0

2013-05-06T20:56:53Z

I also ran into this behavior when updating my brokers today. However, the
change was a little more mysterious, as I had persistent queues setup with
existing bindings from 3.0.2. Instead of seeing any information about
requiring x-match header on the queue bindings, I instead just received the

how to find the number of subscribers to a durable queue in rabbitmq?

2013-05-06T11:24:38Z

In my android app I need to find offline/online status of user. the user
connects to rabbitmq, creates a durable queue with his name and binds to a
durable exchange with queue name as routing key. when the user disconnects
from rabbitmq, if any other user asked my LAMP server the status of
previous user, how can i find it. How can i use rabbitmq http api to do

Re: RECONDITION_FAILED - unknown delivery tag

2013-05-05T23:06:39Z

prefetchCount:1 fixes this issue, but i want to pop items in parallel if
possible.

Re: RECONDITION_FAILED - unknown delivery tag

2013-05-05T22:54:02Z

btw, this is how my API is publishing to the queue:

exchange = connection.exchange('main', { durable: true });
exchange.publish('loc' , { some data in json format }, {deliveryMode: 2});

RECONDITION_FAILED - unknown delivery tag

2013-05-05T22:48:47Z

My Node.js worker crashes (RECONDITION_FAILED - unknown delivery tag) if
the following 2 conditions are met:

1. I start it AFTER the queue have at least 2 messages.
2. The q.shift() is in an async code.

[link]

// index.js
var amqp = require('amqp');

Bug/Behavior Change in binds to header exchanges in rabbitmq 3.1.0

2013-05-03T15:19:20Z

In rabbit 3.0.4 and 2.8.7, I was able to bind a queue to a headers exchange
without specifying any bind arguments, which resulted in that queue
receiving all the messages. In rabbit 3.1.0, when I make that same bind I
get an error message telling me I must include the "x-match" header. While
this is an irritation for clients that use AMQP or the HTTP API to create

Re: Cluster not running - getting Error: {cannot_discover_cluster,"The nodes provided are either offline or not running" error

2013-05-03T08:19:40Z

@shankaralingegowda Singonahalli Chikkarevanna
how did you solved the problem????
i m facing d same problem

On Thursday, 28 February 2013 21:10:56 UTC+5:30, shankaralingegowda

Single Consumer for Queues

2013-05-03T00:29:40Z

Is anyone aware of a way to force only one consumer of a queue. I am not
looking for an exclusive queue since that behavior deletes the queue when
the channel is closed. I need to allow only one consumer on the queue and
have it not be deleted after disconnect.

Jay

MySQL UDF or Storage Engine for RabbitMQ

2013-05-02T15:44:59Z

Hi all,

Does anyone know if there is some work being done on MySQL User Defined
Function (UDF) or AMQP/RabbitMQ specific Storage Engine for MySQL, which
would enable direct integration between MySQL and RabbitMQ.

Primary need we have is to be able to send AMQP messages directly from
MySQL. This is required because some tables are updated by MySQL, without

rabbitmq-discuss Google Group

rabbmitmq - app hangs while calling login user method...

[dotnet-client] Help mocking IModel.BasicPublish

Re: [rabbitmq-discuss] Naming RabbitMQ nodes with complete domain names

Re: channel.basicCancel hangs

Re: channel.basicCancel hangs

channel.basicCancel hangs

Mirrored queue performance factors

Re: [rabbitmq-discuss] Eager sync

Eager sync

More throughput using cluster

Failed to start rabbitmq-server

Strange subtract_acks crash in RabbitMQ 3.1.0-1 (case_clause empty) on EC2

Expected msg/s per CPU core

Recovering an 3-node cluster after power failure

Channel versus Connection shutdown

HTTP API Callback

Trace on specific queues

Re: Flow control issue when shovelling messages between data centres

question about rabbitmq http api basic auth

.NET Client Connection.CreateModel Possible Deadlock / Not Thread Safe?

Flow control issue when shovelling messages between data centres

Production cluster fun, make that not so fun (production cluster setup guidance)!

persistent connections on rabbitmq-server when android client losses internet connection

Re: Queues no longer expire in RabbitMq 3.1.0

Problem with rabbimq-server 3.1.0 and rabbitmq_web_stomp_examples

Re: Queues no longer expire in RabbitMq 3.1.0

[java-client] Is there a full working example of "DefaultConsumer" without *deprecated * QueueingConsumer ?

Re: [rabbitmq-discuss] Cannot start rabbitmq

Cannot start rabbitmq

Using a VIP address for Clients Connecting to 3.1.0

Re: Cluster not running - getting Error: {cannot_discover_cluster,"The nodes provided are either offline or not running" error

Re: Queues no longer expire in RabbitMq 3.1.0

RabbitMQ Flow Control Behavior Questions

RabbitMQ 3.1.0 LDAP plugin help

using Rabbit MQ to send messages directly from Oracle 10g Database

ha-sync-mode policy is NOT recognized

Re: Hanging connections in management interface (v3.0.4)

RabbitMQ 3.1.0 : LDAP Plugin

topic for rabbitmq

Queues no longer expire in RabbitMq 3.1.0

Re: Bug/Behavior Change in binds to header exchanges in rabbitmq 3.1.0

how to find the number of subscribers to a durable queue in rabbitmq?

Re: RECONDITION_FAILED - unknown delivery tag

Re: RECONDITION_FAILED - unknown delivery tag

RECONDITION_FAILED - unknown delivery tag

Bug/Behavior Change in binds to header exchanges in rabbitmq 3.1.0

Re: Cluster not running - getting Error: {cannot_discover_cluster,"The nodes provided are either offline or not running" error

Single Consumer for Queues

MySQL UDF or Storage Engine for RabbitMQ

[java-client] Is there a full working example of "DefaultConsumer" without deprecated QueueingConsumer ?