log4j rollingfileappender file missing

Question

We're seeing an odd problem with the RollingFileAppender.At the end of the day sometimes we look at the directory where the log files are stored, and it appears that some of the log file numbers are missing. It isn't just that it wrote it out with the wrong name, that content is really missing. The gaps in log entry times indicate those missing file names would have contained the missing content.

Is there anything that could explain this? Is there something we can do to mitigate the problem?

Answer 1

The same problem was reported for DailyRollingFileAppender here. It seems that when there's some error where log4j cannot rename a file, it simply overwrites it.