DefaultFtpStatistics throws NullPointerException when account login repeatdly
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Key: FTPSERVER-290
URL: https://issues.apache.org/jira/browse/FTPSERVER-290
Project: FtpServer
Issue Type: Bug
Components: Core
Affects Versions: 1.0.0
Environment: Linux RedHat EL 2.6.9-42.ELsmp
Reporter: Ulysses Lee
When I write a Testcase to make a proformance test for Apache ftp server,
and I only use ONE ftp account in many threads to upload different files, then
after about 10 users loged in,
it throws exception:
[2009-04-14 09:30:52,973] [WARN ] DefaultFtpHandler [[email protected]]
[125.88.130.8] - RequestHandler.service()
java.lang.NullPointerException
at
java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
at
org.apache.ftpserver.impl.DefaultFtpStatistics$UserLogins.loginsFromInetAddress(DefaultFtpStatistics.java:90)
at
org.apache.ftpserver.impl.DefaultFtpStatistics.getCurrentUserLoginNumber(DefaultFtpStatistics.java:259)
at org.apache.ftpserver.command.impl.USER.execute(USER.java:152)
at
org.apache.ftpserver.impl.DefaultFtpHandler.messageReceived(DefaultFtpHandler.java:169)
at
org.apache.ftpserver.listener.nio.FtpHandlerAdapter.messageReceived(FtpHandlerAdapter.java:65)
most likey a thread lock problem?
My test case used Apache NET lib with FTP, it like:
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPReply;
public static void main(String[] args) {
starttime = System.currentTimeMillis();
final File f = new File("F:/WorkSpace/Hermes/Hermes.jar");
for (int i = 0; i < 300; i++) {
final int j = i;
new Thread() {
public void run() {
testUpload("user", "pass", f);
}
}.start();
}
}
public static void testUpload(String username, String password, File localFile)
{
FTPClient ftp = new FTPClient();
try {
ftp.connect(server, port);
System.out.println("Connected to " + server + ".");
ftp.login(username, password);
int reply = ftp.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
ftp.disconnect();
System.err.println("FTP server refused connection.");
System.exit(1);
}
ftp.setFileType(FTP.BINARY_FILE_TYPE);
ftp.enterLocalActiveMode();
ftp.setFileTransferMode(FTP.STREAM_TRANSFER_MODE);
InputStream input = new FileInputStream(localFile);
BufferedInputStream bin = new BufferedInputStream(input);
boolean flag = ftp.storeFile(localFile.getName(), bin);
if (flag) {
System.out.println("success！ cost:<" +
(System.currentTimeMillis() - starttime)
+ " ms>");
} else {
System.out.println("fail！ cost:<" +
(System.currentTimeMillis() - starttime)
+ " ms>");
}
ftp.logout();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (ftp.isConnected()) {
try {
ftp.disconnect();
} catch (IOException ioe) {
}
}
}
}
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