"File Closed" when writing to log file

[joelg236]

private static DataOutputStream logFile() throws IOException {
if (logFile == null || !logFile.isOpen() || !logFile.exists()) {
if(logFile != null) {
logFile.close();
}
logFile = (FileConnection) Connector.open(PATH, Connector.READ_WRITE);
logFile.create();
outputStream = logFile.openDataOutputStream();
}
return outputStream;
}

public static void logFile(String msg) throws IOException {
System.out.println(msg);
appendToFile(msg, logFile());
}

public static void appendToFile(String msg, DataOutputStream outputStream) throws IOException {
if (msg == null || outputStream == null) {
throw new NullPointerException();
}
try {
outputStream.write(msg.getBytes());
outputStream.close();
} catch (IOException ex) {
System.err.println("Error while printing " + msg + "\n\t" + ex.getMessage());
}
}


This code outputs the first log sent to it properly, but every subsequent time logs:
[cRIO] Error while printing test message
[cRIO]
[cRIO] Stream closed

I assumed the stream should always be open (since I open it whenever the stream !isOpen()). But it's not.

Any idea why this is happening?

[joelg236]

EDIT: Solved. I was stupid and put outputStream.close(); every time it appends to the file...