CODEWITHSUNDEEP
.net-core.net-core-2.0
David Hunsicker
David Hunsicker

Reputation: 1240

The library 'libhostpolicy.so' required to execute the application was not found

During running a dotnet console application I encountered this error. I ran it from a directory that had the .dll and .pdb file copied into it.

What is the cause of this error?

Upvotes: 8

Views: 17677

Answers (4)

Michael Smith
Michael Smith

Reputation: 732

I receive this error when I had compiled the dll using the incorrect runtime.

Running a linux-x64 binary on a linux-arm64 system will show this error and vice versa.

Upvotes: 2

robbpriestley
robbpriestley

Reputation: 3300

If you are running a solution that has multiple projects, check to make sure the correct startup project is set.

Upvotes: -1

Mirac
Mirac

Reputation: 138

Please check chmod of application folder. When I change folder access mode, problem was resolved. I know it is a little weird but sometimes it can be related to that :)

You have to determine them like that;

sudo chown -R yourusername:yourusername /var/www/
sudo setfacl -R -d -m u:yourusername:rwx,g:yourusername:rwx,o::r /var/www/

If you don't have setfacl command please install ACL package via this command;

sudo apt install acl

If this doesn't work, please use this command when publishing your project(in Package Manager Console of Visual Studio);

dotnet publish -c Release --self-contained --runtime linux-x64 -o out

And it will create "out" folder in your solution directory, you can copy its contain to server.

Upvotes: 5

David Hunsicker
David Hunsicker

Reputation: 1240

the deps.json and runtimeconfig.json must also be copied into the directory that the .dll is invoked in. Without these files you will encounter this error.

If you're doing post-build copies, make sure to include these files.

Upvotes: 1

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