http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8.
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package org.bouncycastle.crypto.tls;

import java.io.EOFException;


This exception will be thrown (only) when the connection is closed by the peer without sending a close_notify warning alert. If this happens, the TLS protocol cannot rule out truncation of the connection data (potentially malicious). It may be possible to check for truncation via some property of a higher level protocol built upon TLS, e.g. the Content-Length header for HTTPS. 
/**
 * This exception will be thrown (only) when the connection is closed by the peer without sending a
 * {@link AlertDescription#close_notify close_notify} warning alert. If this happens, the TLS
 * protocol cannot rule out truncation of the connection data (potentially malicious). It may be
 * possible to check for truncation via some property of a higher level protocol built upon TLS,
 * e.g. the Content-Length header for HTTPS.
 */
public class TlsNoCloseNotifyException
    extends EOFException
{
    public TlsNoCloseNotifyException()
    {
        super("No close_notify alert received before connection closed");
    }
}