java.io.IOException: Couldn't get lock for

问题:

Get error as

"java.io.IOException: Couldn't get lock for ..\log\abc.log", not sure why this happen.

Can somebody help me out? Thank you

        logger = LogManager.getLogManager().getLogger(className);
        FileHandler logFile = new FileHandler(file);

        // create txt Formatter
        SimpleFormatter formatterTxt = new SimpleFormatter();
        logFile.setFormatter(formatterTxt);         
        logger.addHandler(logFile);

回答1:

@Catheryan

I also had the same issue. For me issue was:

private static final String FILE_PATH="/home/jeril/Logs.log";
handler = new FileHandler(FILE_PATH);

FILE_PATH was WRONG

回答2:

This issue is a long standing bug in FileHandler (reported way back in March 2005, in Java 4):

JDK-6244047 : impossible to specify directories to logging FileHandler unless they exist

Quoting from the description of this bug:

If you specify a patern to the FileHandler that contains directories that don't currently exist then the FileHandler will fail to initialise even if the directories can be created

Its mentioned that it has been fixed in Java 8. For versions earlier than 8, the workaround is to either not use any directory in the pattern used for a FileHandler or use a directory which actually exists on the disk.

回答3:

I think this is due to there being more than one instance of the logger that has it open or some other external application has it open with a read/write lock.