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This particular issue plagued multiple applications after upgrading, specifically by causing some of the tests to fail during the build. NET Core 2.2, we had very little application changes and did not experience these intermittent issues at all. It is a clear workaround.Īnother piece of the puzzle is that I experienced this issue after upgrading to. While I can use the fix above to increase the file watchers inside my container execution, it didn’t seem to get at the root problem. Whether locally on Linux or in a Linux Container you can work around the issue by increasing the number of watchers: echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/nf & sudo sysctl -p Build & Runtime Watchers. #Filewatcher created passing parameters windowsThat being said I was able to experience the issue locally on Windows when running the application inside a container. Specifically, some have a workaround for experiencing additional file watchers as a part of just developing and using vscode with. The local development issues have come up for those with Linux locally. Additionally, in my case, I never experienced this issue in my local Windows development environment, nor should I expect to. That makes sense given that “inotify” max users is a Linux specific construct. Unclear to me at first when looking at this was that the error message is actually platform-specific and only occurs on Linux. #Filewatcher created passing parameters codeIn either case, I have no custom code or file watching in place for most of my API driven applications. This change supposedly places a small performance hit and memory increase as a result of polling for the changes. You can adjust this behavior so that when using this type of API, instead of place the file watcher the application can poll for file changes. An example would be the FileSystemWatcher class. DOTNET Polling File Watches export DOTNET_USE_POLLING_FILE_WATCHER=trueīy default, the DOTNET runtime can watch for file changes by receiving notification asynchronously when that happens. This may work, I never tried it… don’t really use Razor or views in ASP.NET Core much these days with most of the UIs being built as static SPAs. Development File Watchers Disable Razor View Engine File Watches RazorViewEngineOptions.AllowRecompilingViewsOnFileChange = false Turning to our trusty friend “google” for some help, it would seem there are a couple of workarounds being suggested, all depending on where you are encountering the error. Some piece or library within our application is consuming more file watchers than we thought. Essentially this error is telling us that we are watching too many files… more than the host OS allows for any single user (or application). #Filewatcher created passing parameters fullThis is a full application error that results in your host application terminating. System.IO.IOException: The configured user limit (128) on the number of inotify instances has been reached, or the per-process limit on the number of open file descriptors has been reached. If your reading this then you no doubt encountered the following error running you. ![]()
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