问题
I have a application server for network operations written with Java based on Apache Mina. Recently I encounter a strange behavior in my log files. I noticed that the log file is full of @^@^@^@^@^@^@^@^@^@^@^@^.... characters. I mean those unexpected characters are vast amount of as such the log file gets hundreds of GB in a couple of hours! I have no clue about this problem and it is almost impossible to google it. What could be the reason? Are those set of characters any familiar to anybody?
I can give more details about the application if needed.
Thanks in advance.
回答1:
Those characters are null characters (NUL, ASCII value 0) in caret notation.
In caret notation for control characters the null character is ^@.
来源：https://stackoverflow.com/questions/3043740/strange-messages-in-log-file