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ASF GitHub Bot commented on IO-528: ----------------------------------- Github user asfgit closed the pull request at: https://github.com/apache/commons-io/pull/29 > Tailer.run race condition runaway logging > ----------------------------------------- > > Key: IO-528 > URL: https://issues.apache.org/jira/browse/IO-528 > Project: Commons IO > Issue Type: Bug > Components: Utilities > Affects Versions: 2.5 > Reporter: Dave Moten > > `Tailer.run` has a race condition that can have serious effects. > The `run()` method has two while loops. The first waits till the file exists > and the second loop reads lines from the file doing some file rotation > checking on the way. If the file is deleted while the second loop is in > progress then the loop goes crazy logging warnings that look like this: > ` > Dec 06, 2016 1:02:18 AM com.github.davidmoten.logan.LogFile$1 fileRotated > INFO: file rotated > Dec 06, 2016 1:02:18 AM com.github.davidmoten.logan.LogFile$1 fileNotFound > WARNING: file not found > Dec 06, 2016 1:02:18 AM com.github.davidmoten.logan.LogFile$1 fileRotated > INFO: file rotated > Dec 06, 2016 1:02:18 AM com.github.davidmoten.logan.LogFile$1 fileNotFound > WARNING: file not found > Dec 06, 2016 1:02:18 AM com.github.davidmoten.logan.LogFile$1 fileRotated > INFO: file rotated > Dec 06, 2016 1:02:18 AM com.github.davidmoten.logan.LogFile$1 fileNotFound > WARNING: file not found > Dec 06, 2016 1:02:18 AM com.github.davidmoten.logan.LogFile$1 fileRotated > INFO: file rotated > Dec 06, 2016 1:02:18 AM com.github.davidmoten.logan.LogFile$1 fileNotFound > WARNING: file not found > ` > In our case this had serious effects. The file being tailed was deleted by > another process and all available disk space was rapidly used up by the > logging. This crashed a system. > The fix is to put a sleep after the call to `fileNotFound()`. > This problem was raised in IO-398 three years ago but no change was made to > the code base. > PR submitted via github repo. -- This message was sent by Atlassian JIRA (v6.3.15#6346)