erlang | Development repository for the erlang cookbook | Infrastructure Automation library

 by   sous-chefs Ruby Version: 8.1.19 License: Apache-2.0

kandi X-RAY | erlang Summary

kandi X-RAY | erlang Summary

erlang is a Ruby library typically used in Devops, Infrastructure Automation, Chef applications. erlang has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Manages installation of Erlang via packages or source.
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              erlang has a low active ecosystem.
              It has 85 star(s) with 113 fork(s). There are 58 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 2 open issues and 20 have been closed. On average issues are closed in 263 days. There are 1 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of erlang is 8.1.19

            kandi-Quality Quality

              erlang has no bugs reported.

            kandi-Security Security

              erlang has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              erlang is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              erlang releases are available to install and integrate.

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            erlang Key Features

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            erlang Examples and Code Snippets

            No Code Snippets are available at this moment for erlang.

            Community Discussions

            QUESTION

            RabbitMQ does not load the advanced.config file
            Asked 2021-Jun-14 at 09:19

            We are looking to upgrade to the latest version of RabbitMQ so I have installed Erlang 24.0 and RabbitMQ 3.8.16 onto a Windows 10 PC for testing. I have the two RabbitMQ configuration files (rabbitmq.conf and advanced.config) stored in a folder called C:\RabbitMQ. The advanced.config contains static shovel configuration. I cannot get RabbitMQ to recognise the advanced.config file. Has anyone encountered this problem before?

            We have earlier installs of RabbitMQ (i.e. Erlang 22.1 an RabbitMQ 3.8.2) running on Windows Server 2019 and these earlier versions load both config files with no issues.

            All of our RabbitMQ installations store the config files in a folder called C:\RabbitMQ. We then set three environment variables to ensure that RabbitMQ recognises the folder and files:

            • RABBITMQ_ADVANCED_CONFIG_FILE - C:\RabbitMQ\advanced
            • RABBITMQ_BASE - C:\RabbitMQ
            • RABBITMQ_CONFIG_FILE - C:\RabbitMQ\rabbitmq

            I have followed the advice on the RabbitMQ config page https://www.rabbitmq.com/configure.html with regard to verifying the config file location.

            I have also run the rabbitmq-diagnostics command which shows that only one config file is being loaded:

            If I run the same command on our earlier installation then I can see that both files are being loaded:

            ...

            ANSWER

            Answered 2021-Jun-14 at 09:19

            We tested it internally and everything works as expected.

            Note that:

            Source https://stackoverflow.com/questions/67962479

            QUESTION

            Why are atoms not garbage collected by the BEAM?
            Asked 2021-Jun-14 at 05:13

            Well, the title says it all: I'm wondering what is the reason why the BEAM doesn't garbage collect atoms. I'm aware of question How Erlang atoms can be garbage collected but, while related, it doesn't reply to why.

            ...

            ANSWER

            Answered 2021-Jun-12 at 20:42

            Because that is not possible (or at least very hard) to do in the current design. Atoms are important part of:

            • modules, as module names are atoms
            • function names, which also are atoms
            • distributed Erlang also extensively use atoms

            Especially last point makes it hard. Imagine for second that we would have a GC for atoms. What would happen if there would be a GC cleanup in between the distributed call where we send some atoms over the wire? All of that makes atoms quite essential to how VM works and making them GCed would not only make implementation of VM much more complex, it would also make code much slower as atoms do not need to be copied between processes and as these aren't GCed, these can be completely omitted in GC mark step.

            Source https://stackoverflow.com/questions/67923700

            QUESTION

            What is the Erlang/OTP release and LTS schedule?
            Asked 2021-Jun-13 at 17:19

            What is the Erlang/OTP release schedule? How many major versions are released per year, and is there a schedule you can link?

            What versions have long-term support (LTS)?

            ...

            ANSWER

            Answered 2021-Feb-01 at 09:57

            Since the release of Erlang/OTP 18.0 in June 2015, there has been a major release every year in June, followed by minor releases (x.1, x.2, x.3) in September, December and March. There are also frequent patch packages announced on the erlang-announce mailing list.

            I'm pretty sure this release schedule was announced on the erlang-questions mailing list, but I can't find it now...

            There are, strictly speaking, no LTS versions. The documentation on supported releases says:

            In general, bugs are only fixed on the latest release, and new features are introduced in the upcoming release that is under development. However, when we, due to internal reasons, fix bugs on older releases, these will be available and announced as well.

            Source https://stackoverflow.com/questions/65979482

            QUESTION

            Rabbitmq msg_store_transient of a queue is consuming all disk space
            Asked 2021-Jun-11 at 17:28

            erlang version = 1:24.0.2-1

            rabbitmq-server version = 3.8.16-1

            Recently installed latest rabbitmq on Ubuntu20. I verified that all was working fine and consumer was consuming the notification from messaging queue as required.

            After approximately a day, rabbbitmq crashed as there was 0 disk space left.

            After analysis found that around 10G was consumed by msg_store_transient, to which restarting rabbitmq solved the issue. But after a day, it happens again.

            Can someone help me further?

            ...

            ANSWER

            Answered 2021-Jun-06 at 12:54

            most likely you are consuming messages without sending back the basic_ack, see for example here the ch.basic_ack

            What to do:

            • check the unacked messages see:
            • check if you are using too many not persistent messages
            • check if you are using too many not persistent queues

            Source https://stackoverflow.com/questions/67851369

            QUESTION

            Python3.6 is there a erlang style message queue?
            Asked 2021-Jun-10 at 08:34

            I'm looking for a message queue implementation for python 3.6 (this exact version) that can be used to communicate between multiprocess.Processes, specifically, It should be a multiproducer, single consumer, fifo with priority receive of messages of application specific types (e.g. if there is an system message (in erlang terms) in the middle of the queue, and an normal message in the head of the queue, the next receive should return the system message rather than the normal one)

            But I doubt there will be such an library, so the question becomes, is there any stdlib or third party lib that gives me a chunk of shared memory or better a list, so I can read write to a buffer backed but the memory/list and guard the order with something like mp.Lock?

            multiprocessing.Manager uses tcp, and starts a new process

            ...

            ANSWER

            Answered 2021-Jun-10 at 08:34

            I'm not so familiar with Erlang, but, based on how you described your needs, I think you might be able to take the approach of using multiprocessing.Queue and sorting your messages before reading them.

            The idea is to have a multiprocessing.Queue (FIFO message queue) for each process. When process A sends a message to process B, process A puts its message along with the message's priority into process B's message queue. When a process reads its messages, it transfers the messages from the FIFO queue into a list and then sorts the list before handling the messages. Messages are sorted first by their priority followed by the time at which they arrived in the message queue.

            Here's an example that has been tested with Python 3.6 on Windows.

            Source https://stackoverflow.com/questions/67914662

            QUESTION

            Rabbitmq: Consumers for SAC queues are not connected after node in a cluster is restarted
            Asked 2021-Jun-09 at 08:46

            Setup: 3 node cluster of rabbitmq nodes(via docker), behind ha-proxy.

            Version:

            • RabbitMQ: 3.8.11
            • Erlang: 23.2.3
            • Spring-amqp: 1.7.3

            Spring-boot(1.5.4) app with 3 queues.

            1. defined as "exclusive", durable, auto-delete is false
            2. defined as "SAC", durable, auto-delete is false
            3. classic, durable, auto-delete is false

            Policy:

            Scenario:

            1. When application starts at first, queues are registered correctly.
            2. I bring down any node at random, if it is master node, the mirroring is triggered and one of the mirrored node becomes master.All fine so far.
            3. When I bring that node up, it is when I start to get exceptions in the application logs:

            Logs:

            ...

            ANSWER

            Answered 2021-Mar-18 at 21:25

            Boot 1.5.x and Spring AMQP 1.7.x are end of life and no longer supported.

            That said, the following applies to 1.7.x too.

            This situation will occur if queue recovery takes longer then 15 seconds (by default).

            This is controlled by 2 container properties.

            Source https://stackoverflow.com/questions/66697495

            QUESTION

            How to dockerize rebar3-erlang application?
            Asked 2021-Jun-05 at 06:23

            I have encountered some problems with dockerizing my rebar3 app. As I'm trying to run the app (after building) I receive an error /prod/bin/prod: line 272: /prod/erts-11.2.2.1/bin/erl: not found

            This is my rebar.config:

            ...

            ANSWER

            Answered 2021-May-30 at 10:09

            Erlang does not compile into binary files, you still need the erlang runtime to be able to run the application, yet your final docker image is a fresh alpine install that doesn't have erlang installed

            Source https://stackoverflow.com/questions/67752740

            QUESTION

            Unable to see color in vim after upgrade
            Asked 2021-Jun-03 at 06:48

            Recently updated the macOS to Bigsur and as part of the update, I also updated the packages through homebrew. My coc.nvim plugin was not working so, I reinstalled the package. And after that, I am unable to see the color of my scheme (gruvbox) which is also installed as a plugin. Now the screen is all grey with the dark background (the background was dark even previously). I am attaching the vim settings for clarification. The syntax setting is enabled and it is rightly picking erlang, the termguicolors is set as well. I am using mac terminal to invoke vim.

            ...

            ANSWER

            Answered 2021-Jun-03 at 06:48

            Vim colorschemes typically define styling attributes for basic terminals (term), color terminals (cterm*), and GUI (gui*). Here is an example:

            Source https://stackoverflow.com/questions/67811827

            QUESTION

            Erlang: starting sellaprime app with supervisor returns undef error
            Asked 2021-Jun-01 at 19:38

            Trying to run the example app, sellaprime app, from the programming erlang book. I tested the supervisor code with the testing function within the supervisor. So, the supervisor should be OK. The application gets loaded but the application start runs into problem with below error:

            ...

            ANSWER

            Answered 2021-Jun-01 at 19:38

            QUESTION

            Debugging Elixir streams
            Asked 2021-May-22 at 15:56

            I am new to Elixir and I would like to learn how to debug Streams better.

            It's common where I work to have operations performed on large datasets. This means that Streams are used heavily until the final operation, usually an Enum.sum().

            But this unfortunately means several calls look indecipherable as they are composed of several undocumented Stream.map functions. (a problem we are currently fixing). I would like to see the state of the data as it passes from stream to stream for debugging. How is this normally accomplished?

            Example:

            ...

            ANSWER

            Answered 2021-May-22 at 15:56

            Would it be enough to start with connecting IO.inspect/2 to your pipeline? ie:

            Source https://stackoverflow.com/questions/67625607

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install erlang

            You can download it from GitHub.
            On a UNIX-like operating system, using your system’s package manager is easiest. However, the packaged Ruby version may not be the newest one. There is also an installer for Windows. Managers help you to switch between multiple Ruby versions on your system. Installers can be used to install a specific or multiple Ruby versions. Please refer ruby-lang.org for more information.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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