Program: 103119
Project: 103119
Buggy source:
/** 
 * Notifies a specific <tt>CallPeer</tt> about changes in the telephony conference-related information.
 * @param callPeer the <tt>CallPeer</tt> to notify.
 */
private void notify(CallPeer callPeer){
  if (!(callPeer instanceof CallPeerJabberImpl))   return;
  final CallPeerJabberImpl callPeerJabber=(CallPeerJabberImpl)callPeer;
  final long timeSinceLastCoin=System.currentTimeMillis() - callPeerJabber.getLastConferenceInfoSentTimestamp();
  if (timeSinceLastCoin < COIN_MIN_INTERVAL) {
    if (callPeerJabber.isCoinScheduled())     return;
    logger.info("String_Node_Str" + callPeerJabber);
    callPeerJabber.setCoinScheduled(true);
    new Thread(new Runnable(){
      @Override public void run(){
        try {
          Thread.sleep(1 + COIN_MIN_INTERVAL - timeSinceLastCoin);
        }
 catch (        InterruptedException ie) {
        }
        OperationSetTelephonyConferencingJabberImpl.this.notify(callPeerJabber);
      }
    }
).start();
    return;
  }
  String to=getBasicTelephony().getFullCalleeURI(callPeer.getAddress());
  try {
    DiscoverInfo discoverInfo=parentProvider.getDiscoveryManager().discoverInfo(to);
    if (!discoverInfo.containsFeature(ProtocolProviderServiceJabberImpl.URN_XMPP_JINGLE_COIN)) {
      logger.info(callPeer.getAddress() + "String_Node_Str");
      callPeerJabber.setCoinScheduled(false);
      return;
    }
  }
 catch (  XMPPException xmppe) {
    logger.warn("String_Node_Str" + to,xmppe);
  }
  ConferenceInfoDocument currentConfInfo=getCurrentConferenceInfo(callPeer);
  ConferenceInfoDocument lastSentConfInfo=callPeerJabber.getLastConferenceInfoSent();
  ConferenceInfoDocument diff=getConferenceInfoDiff(lastSentConfInfo,currentConfInfo);
  if (diff != null) {
    int newVersion=lastSentConfInfo == null ? 1 : lastSentConfInfo.getVersion() + 1;
    diff.setVersion(newVersion);
    IQ iq=getConferenceInfo(callPeerJabber,diff);
    if (iq != null) {
      parentProvider.getConnection().sendPacket(iq);
      currentConfInfo.setVersion(newVersion);
      callPeerJabber.setLastConferenceInfoSent(currentConfInfo);
      callPeerJabber.setLastConferenceInfoSentTimestamp(System.currentTimeMillis());
    }
  }
  callPeerJabber.setCoinScheduled(false);
}

Fixed version (ground truth):
/** 
 * Notifies a specific <tt>CallPeer</tt> about changes in the telephony conference-related information.
 * @param callPeer the <tt>CallPeer</tt> to notify.
 */
private void notify(CallPeer callPeer){
  if (!(callPeer instanceof CallPeerJabberImpl))   return;
  final CallPeerJabberImpl callPeerJabber=(CallPeerJabberImpl)callPeer;
  final long timeSinceLastCoin=System.currentTimeMillis() - callPeerJabber.getLastConferenceInfoSentTimestamp();
  if (timeSinceLastCoin < COIN_MIN_INTERVAL) {
    if (callPeerJabber.isCoinScheduled())     return;
    logger.info("String_Node_Str" + callPeerJabber);
    callPeerJabber.setCoinScheduled(true);
    new Thread(new Runnable(){
      @Override public void run(){
        try {
          Thread.sleep(1 + COIN_MIN_INTERVAL - timeSinceLastCoin);
        }
 catch (        InterruptedException ie) {
        }
        OperationSetTelephonyConferencingJabberImpl.this.notify(callPeerJabber);
      }
    }
).start();
    return;
  }
  String to=getBasicTelephony().getFullCalleeURI(callPeer.getAddress());
  try {
    DiscoverInfo discoverInfo=parentProvider.getDiscoveryManager().discoverInfo(to);
    if (!discoverInfo.containsFeature(ProtocolProviderServiceJabberImpl.URN_XMPP_JINGLE_COIN)) {
      logger.info(callPeer.getAddress() + "String_Node_Str");
      callPeerJabber.setCoinScheduled(false);
      return;
    }
  }
 catch (  XMPPException xmppe) {
    logger.warn("String_Node_Str" + to,xmppe);
  }
  ConferenceInfoDocument currentConfInfo=getCurrentConferenceInfo(callPeer);
  ConferenceInfoDocument lastSentConfInfo=callPeerJabber.getLastConferenceInfoSent();
  ConferenceInfoDocument diff;
  if (lastSentConfInfo == null)   diff=currentConfInfo;
 else   diff=getConferenceInfoDiff(lastSentConfInfo,currentConfInfo);
  if (diff != null) {
    int newVersion=lastSentConfInfo == null ? 1 : lastSentConfInfo.getVersion() + 1;
    diff.setVersion(newVersion);
    IQ iq=getConferenceInfo(callPeerJabber,diff);
    if (iq != null) {
      parentProvider.getConnection().sendPacket(iq);
      currentConfInfo.setVersion(newVersion);
      callPeerJabber.setLastConferenceInfoSent(currentConfInfo);
      callPeerJabber.setLastConferenceInfoSentTimestamp(System.currentTimeMillis());
    }
  }
  callPeerJabber.setCoinScheduled(false);
}