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From "Sean Qiu (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-5981) [classlib][logging] FileHandler may throw exception when logging to the same file by multiple thread
Date Thu, 11 Sep 2008 12:39:45 GMT
[classlib][logging] FileHandler may throw exception when logging to the same file by multiple

                 Key: HARMONY-5981
                 URL: https://issues.apache.org/jira/browse/HARMONY-5981
             Project: Harmony
          Issue Type: Bug
          Components: Classlib
    Affects Versions: 5.0M7
            Reporter: Sean Qiu
            Assignee: Sean Qiu
             Fix For: 5.0M8

When we are trying to log by a Filehandler to publish the information into a same file,it
will introduce multi-thread defect .
As a result, it will throw such exception[1] while logging. 
The root cause is that the destination file may be deleted by other thread if they are not

Below testcase[2] can reproduce the issue.

java.util.logging.ErrorManager: WRITE_FAILURE
Error message - Exception occurred when writing to the output stream.
Exception - java.io.IOException: Writer is closed.

package logging;

import java.io.File;
import java.util.logging.FileHandler;
import java.util.logging.Logger;

public class FileHandlerTest {

    static class LoggingThread implements Runnable {
        private Logger logger;
        public LoggingThread(Logger logger){
            this.logger = logger;
        public void run() {
            while (true) {

    public static void main(String[] args) throws Exception {
        Logger logger = Logger.getLogger("test");
        String path = new File(".").getAbsolutePath();
        FileHandler fh = new FileHandler(path, 3000000, 12, false);

        Thread[] threads = new Thread[12];
        for (Thread thread : threads) {
            thread = new Thread(new LoggingThread(logger));

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