Could not run logtail or save output how to#
Could not run logtail or save output code#

The command is executed when the files are passed as arguments.

The xargs command takes a list of files and the name of a command.

The output filenames are the oldest files in the directory.

Using the Linux tail command without specifying options, we will read the last ten files from the list.

We pipe the file list to the Linux tail command. This also serves as a protection so that you don’t accidentally delete important files when you open it. This is a common file extension for backup files. The oldest files are at the bottom of the list.

Using the “-t” option, the files are sorted according to their modification date.

The ls command lists the files in a directory.

Useful to abort the live tail when the file-writing program is terminated. Used in conjunction with the -f option, the tail command is terminated when the process with the specified process ID terminates. This is particularly useful in combination with the “-follow=name” option to continue monitoring the new file with the same name after a log file has been rotated. Try to reopen an unavailable file as soon as it becomes available again. Output of the file is left to rest for the specified number of seconds. This means that the live tail continues to run even if the file is renamed or moved.Ĭorrespond to the call with -follow= name -retry the effect is that the live tail continues to run even if the original file is removed during the log rotation and replaced by a new file with the same name.

If a value is not specified after “-follow=”, “descriptor” is used as the default value. This works good and we have 3 files at LogFiles Directory.Monitor the file for changes and continuously output new data written to the end of the file. We have debug.log, error.log and info.log. We are checking possible move from Rackspace to Azure. We just to tail on one of the log file or on catalina.out. We are looking for a solution to do the same in azure as watching the logfiles in real-time is very critical to the development process. It seems that azure cli should provide this kind of functionality. But it refresh the output only when I access to the log file (e.g the debug.log) throw kudu system. It seems like accessing the file trigger an event change or something like that.

Could not run logtail or save output how to#

I have test in in several different times and its only output the log into the command line when I reenter the file via kudu file editor Edit 2 Summary: Any idea how to get real-time logging information? But without reentering the file there is no output to the console. I connected to a linux server on azure and did curl.

If I open the kudu editor it triggers the output of the curl For some reason it does not show the output of tomcat logfiles in realtime. Moreover I looked into the Kudu/Logstream source code. It uses FileSystemWatcher to watch the folder for change. More important this function - according to quite a few reports in stackoverflow- is not reliable function in order to monitor.So it basically uses only the default values For example this answer ended up writing a separate thread in order to read single byte from each file. They claim the read function will trigger the event, even a single byte read. I'm guessing here that this is exactly what happen when I read the file via Kudu editor. Yes, the cat function on kudu command line also triggers the output which support the 2nd point above This forces the system to read from the file which triggers the onChange event. 'if you're watching multiple files, even if they're all in the same directory and being watched by the same watcher, you'll need a FileInfo instance for each file you're watching and your timer callback should refresh them all with each 'tick'.'Īm.

Could not run logtail or save output code#

I don't think the solution should come from the app code as the log4j2 starts writing before the app is complete up.