A DESCRIPTION OF THE PROBLEM :
XMLEventReader closes underlying input source just during process of parsing XML. This is unexpected and leads to undesirable effects.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run a program compiled from the source code specified below.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Console output reads:

The UncheckedIOException is expected here.
ACTUAL -
Console output reads:

We don't expect UncheckedIOException to show up here.
There must be no way for xmlEventReader.hasNext() to be true at this point.

---------- BEGIN SOURCE ----------
package ru.gazprombank.omniglossary;

import javax.xml.XMLConstants;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import java.io.IOException;
import java.io.StringReader;
import java.io.UncheckedIOException;

public class XMLEventReaderBugReport {

    public static void main(String[] args) throws XMLStreamException {
        var xmlInputFactory = XMLInputFactory.newFactory();
        var input = new StringReader("<a/>") {
            private boolean closed = false;
            @Override
            public void close() {
                if (closed) {
                    return;
                }
                this.closed = true;
                if (System.currentTimeMillis() > 0) {
                    throw new UncheckedIOException(new IOException("close failed"));
                }
            }
        };
        var xmlEventReader = xmlInputFactory.createXMLEventReader(input);
        while (xmlEventReader.hasNext()) {
            try {
                xmlEventReader.nextEvent();
            } catch (UncheckedIOException e) {
                System.err.printf("We don't expect UncheckedIOException to show up here.%n");
                break;
            }
        }
        if (xmlEventReader.hasNext()) {
            System.err.printf("There must be no way for xmlEventReader.hasNext() to be true at this point.%n");
        }
        try {
            input.close();
        } catch (UncheckedIOException e) {
            System.err.printf("The UncheckedIOException is expected here.%n");
        }
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Wrap input stream into custom classes to control time of calling the method close() and to catch its exceptions.

FREQUENCY : always