ADDITIONAL SYSTEM INFORMATION :
JDK : JDK1.7.0_79-b15(bug same in jdk1.7.0_80);
OS:Windows7 and linux2.6.32


A DESCRIPTION OF THE PROBLEM :
1.execute ImageIO.read(url) when the resource of url is not exist.
2.the number of "TCP close_wait" keeps growing

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.execute ImageIO.read(url) like the following codes:
 
//Author:yuyicheng
// domain must exists,but file doesnot.
String vivofsUrl = "https://domain/wiwNWYCFW9ieGbWq/20181129/3a2adfde12cd328d81f965088890eeffff.jpg";

File file = null;

BufferedImage image = null;

try {
file = File.createTempFile("abc", "jpg");

URL url1 = new URL(vivofsUrl);
image = ImageIO.read(url1);

} catch (Throwable e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (null != file) {
file.delete();
}
if (null != image) {
image.flush();
image = null;
// System.gc();
}

}
2.to execute many times for Obviousness!
Ofcourse,it will throw FileNotFoundException and "IIOException: Can't get input stream from URL!"),

3.check tcp status




EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Close Connection correctly.
ACTUAL -
1.Tracking TCP flow：many tcp "RST" message occured
2.print TCP Status:the number of "TCP close_wait" keeps growing

---------- BEGIN SOURCE ----------
public static void main(String[] args) throws InterruptedException {

ExecutorService ex = Executors.newFixedThreadPool(10);
for (int i = 0; i < 5000; i++) {
ex.execute(task());
}
}

/**
* @throws IOException
* @throws MalformedURLException
*/
private static Runnable task() {

return new Runnable() {

@Override
public void run() {
// Author:yuyicheng
// domain must exists,but file doesnot.
String vivofsUrl = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1543505646937&di=ec0e29a9994a9a96e044c85228d01d18&imgtype=0&src=http%3A%2F%2Fimages.nike.com%2Fis%2Fimage%2FDotCom%2FPDP_HERO_S%2FNIKE-TEXTURED-FOAM-ROLLER-NER123_644_A.jpg";

File file = null;

BufferedImage image = null;

try {
file = File.createTempFile("abc", "jpg");

URL url1 = new URL(vivofsUrl);
image = ImageIO.read(url1);

} catch (Throwable e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (null != file) {
file.delete();
}
if (null != image) {
image.flush();
image = null;
}

}
}
};

}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
do not use ImageIO.read(url) ，use others instead!

FREQUENCY : always