Just doing some testing on local machine, would like somewhere to inspect messages that are published and persisted by RabbitMQ (deliveryMode = 2). Or at least to have a time when messages was actually persisted. First try was RabbitMQ admin management, went trough all options and closest what i have found is following:
Database directory: /usr/local/var/lib/rabbitmq/mnesia/rabbit#localhost
There i can found many files with rdq extenstions and many logs file, but can't actually see nothing.
you can't, RabbitMQ uses a custom database and it is not possible to browse it.
you can only browse the RabbitMQ definitions as "queues", "users", "exchanges" etc.. but not the messages.
By default, the messages index is inside:
/usr/local/var/lib/rabbitmq/mnesia/rabbit#localhost/queues/HASHQUEUE
The only way it is as suggested by #Johansson
It's possible to manually inspect your message in the queue via the Management interface. Press on the queue that has the message, and then "Get message". If you mark it as "requeue", RabbitMQ puts it back to the queue in the same order.
https://www.cloudamqp.com/blog/2015-05-27-part3-rabbitmq-for-beginners_the-management-interface.html
Related
rabbitMQ version: 3.11.8 , MassTransit: 8.0.1.
I have a queue with this config:
x-queue-type:quorum, x-single-active-consumer:true, durable:true
sometimes I need to do the action: GetMessage(s) in the Management panel.
but now with this queue I got this exeption:
405 RESOURCE_LOCKED - cannot obtain access to locked queue 'myQueue' in vhost 'xxx'. basic.get operations are not supported by quorum queues with single active consumer
usaully I need to read messages from errpr_queue that Masstransit created.
I've searched for that, and I found just some solutions for exclusive queues- for example issue 1 and issue 2.
but I couldn't find any solution for 'cannot obtain access to locked queue'
So, you've requested a single active consumer on the queue. And when you try to get messages in the console, it reports that the queue is locked.
Seems like that would be expected behavior, and it's telling you as much in the error message.
I am running a workflow on a n1-ultramem-40 instance that will run for several days. If an error occurs, I would like to catch and log the error, be notified, and automatically terminate the Virtual Machine. Could I use StackDriver and gcloud logging to achieve this? How could I automatically terminate the VM using these tools? Thanks!
Let's break the puzzle into two parts. The first is logging an error to Stackdriver and the second is performing an external action automatically when such an error is detected.
Stackdriver provides a wide variety of language bindings and package integrations that result in log messages being written. You could include such API calls in your application which detects the error. If you don't have access to the source code of your application but it instead logs to an external file, you could use the Stackdriver agents to monitor log files and relay the log messages to Stackdriver.
Once you have the error messages being sent to Stackdriver, the next task would be defining a Stackdriver log export definition. This is the act of defining a "filter" that looks for the specific log entry message(s) that you are interested in acting upon. Associated with this export definition and filter would be a PubSub topic. A pubsub message would then be written to this topic when an Stackdriver log entry is made.
Finally, we now have our trigger to perform your action. We could use a Cloud Function triggered from a PubSub message to execute arbitrary API logic. This could be code that performs an API request to GCP to terminate the VM.
The following piece of code has been working for some time and it has suddenly stopped returning:
await availableChangedPublishEndpoint
.Publish<IAvailableStockChanged>(
AvailableStockCounter.ConvertSkuQtyToAvailableStockChangedEvent(
newAvailable,
absMessage.Warehouse)
);
There is nothing clever in ConvertSkuQtyToAvailableStockChangedEvent - it just maps one simple class to another.
We added logs before and after this code and it's definitely just stopping at this point. Other systems are publishing fine, other messages are being sent from this application (for e.g. logs are actually sent via RabbitMQ). We have redeployed and we have upgraded to latest MassTransit version. We are seeing that the messages are being published - possibly multiple times, but this Publish method never returns.
We had a broken RabbitMQ node and a clean service restart on one node fixed it. I appreciate there might be other reasons for this behaviour, but this was our problem.
systemctl restart rabbitmq-server
Looking further into RabbitMQ we saw that some of the empty queues that were connected to this exchange were not synchronized (see below) and when we tried to synchronize them that wouldn't work.
We also couldn't delete some of these unsynchronized queues.
We believe an unexpected shutdown of one of the nodes had caused this problem - but it left most queues / exchanges completely OK.
I'm working on a notification tool for our MSMQ instances at work. It will need to peek at every queue on a machine. However I'm having a hard time with the permissions related to the DeadLetter and XactDeadLetter system queues. Access is always denied.
I open up Computer Management, expand Services and Applications, right click Message Queuing and click properties. In the properties dialog, I go to the Security tab and add my domain service account user and indicate that I want to give the user Full Control. Upon clicking apply, I get this popup:
And when I click ok on that popup, I get:
I've looked into setting the security on queues manually, but it seems that system queues do not get files in C:\WINDOWS\system32\msmq\storage\lqs as described by this question.
If I try to take ownership over the Message Queuing, I get the same popups as above.
I'm told "Access to Message Queuing system is denied" in a MessageQueueException thrown at the MoveNext below:
MessageEnumerator enumer = messageQueue.GetMessageEnumerator2();
while (enumer.MoveNext()) {
...
}
What can be done to allow my service account to peek at the remote system queue?
I had the same issue recently, I couldn't assume ownership of the queues to set an account's permissions to peek. However, stopping the msmq service and using this advice solved my problem.
http://blog.aggregatedintelligence.com/2012/03/msmqsecurity-descriptor-cannot-be-set.html
Im having major issues with Mule 3 and files being read and that later should be put on some standard queue on ActiveMQ.
basically its a really simple service, initially started that on inbound starts off by
This file is read correctly from the SFTP area, and in the mule log for the reading application its stated that the file is written to the specified archiveDir..
After this, its silent, nothing else happens... the file is just placed in the archiveDir and neithe ActiveMQ or Mule3 gives any indications to that something have gone wrong...
The queue names etc etc is all correct.
Basically the same environment is running on a second server, with no disturbance..
Is there any commonly known issues that could make mule not continue on with its processing putting the file on queue?
Thx in advance!