Tag Archives: Operation and maintenance development

[Solved] Error: unable to perform an operation on node ‘rabbit@DESKTOP-xxx‘. Please see diagnostics informa

1. Recurrence problem

Today, I logged in to the rabbitmq background management. After inputting the user name and password, this error was reported: not management user, as shown in the following figure:

So I decided to execute the command rabbitmqctl list_users check whether there is this user.

  1. First D:\Software\rabbitmq\rabbitmq_server-3.8.15\sbinenter in the directory cmd:

  1. Execute the following command in the cmdcommand window:
rabbitmqctl list_users

But the following error is reported:

D:\Software\rabbitmq\rabbitmq_server-3.8.15\sbin>rabbitmqctl list_users
Error: unable to perform an operation on node 'rabbit@DESKTOP-UVTEHFR'. Please see diagnostics information and suggestions below.

Most common reasons for this are:

 * Target node is unreachable (e.g. due to hostname resolution, TCP connection or firewall issues)
 * CLI tool fails to authenticate with the server (e.g. due to CLI tool's Erlang cookie not matching that of the server)
 * Target node is not running

In addition to the diagnostics info below:

 * See the CLI, clustering and networking guides on https://rabbitmq.com/documentation.html to learn more
 * Consult server logs on node rabbit@DESKTOP-UVTEHFR
 * If target node is configured to use long node names, don't forget to use --longnames with CLI tools

DIAGNOSTICS
===========

attempted to contact: ['rabbit@DESKTOP-UVTEHFR']

rabbit@DESKTOP-UVTEHFR:
  * connected to epmd (port 4369) on DESKTOP-UVTEHFR
  * epmd reports: node 'rabbit' not running at all
                  no other nodes on DESKTOP-UVTEHFR
  * suggestion: start the node

Current node details:
 * node name: 'rabbitmqcli-999-rabbit@DESKTOP-UVTEHFR'
 * effective user's home directory: C:\Users\zxy
 * Erlang cookie hash: pkFzX53V7Ok1QDOYqiMzXg==

3. Solving problems

Copy the .erlang.cookie file from the C:\user\your username\ directory to the C:\Windows\System32\config\systemprofile\ directory, as follows:

If the .erlang.cookie file already exists in C:\Windows\System32\config\systemprofile\, just use the .erlang.cookie file in the C:\user\your username\ directory to replace it.

Double-click rabbitmq-server.bat to restart the rabbitmq service, as shown in the following image:


In the cmd command line window, enter rabbitmqctl list_users again:

Error while loading error while loading shared libraries [How to Solve]

Error while loading error while loading shared libraries solution

If it’s missing, find it and put it back

Distribution: archlinux
as stated in the title, take the yaourt encountered before writing this article as an example:

➜  ~ yaourt -Ss uswsusp
yaourt: error while loading shared libraries: libalpm.so.12

After looking at the in the system, I found that libalpm. So has been upgraded to 13 

➜  ~ ls -l /usr/lib/libalpm.so*
lrwxrwxrwx 1 root root     13 Jul 16 03:26 /usr/lib/libalpm.so -> libalpm.so.13
lrwxrwxrwx 1 root root     17 Jul 16 03:26 /usr/lib/libalpm.so.13 -> libalpm.so.13.0.0
-rwxr-xr-x 1 root root 243608 Jul 16 03:26 /usr/lib/libalpm.so.13.0.0

Well, the problem is very simple. The library has been upgraded, but the dependent software developers have not upgraded.

Next, only three steps are required:
confirm the software from libalpm. So and download the old version (which may contain 12 generally open the package. You can directly find the corresponding link library and copy it to under /usr/Lib My detailed steps:
the search discovery may be in the Pacman package

➜  ~ pacman -Ss libalpm
core/pacman 6.0.0-5 (base-devel) [installed]
    A library-based package manager with dependency support
extra/pyalpm 0.10.6-1
    Python 3 bindings for libalpm
(..... Other insignificant packages)

To download the old software package of archlinux, you need to find it in arch archive.

In the /packages/P/Pacman/ directory, I tried to download the previous version of the current version (v6.0.0), pacman-5.2.2-4-x86_ 64.pkg.tar.zst

Open it directly and find libalpm. So. 12

finally, copy the extracted libalpm. So. * to /usr/lib （ Be careful not to copy the one without version suffix ( libalpm. So )