How to use

sendOOB

method

in

org.apache.hadoop.hdfs.server.datanode.DataXceiver

public synchronized void sendOOBToPeers() {
 if (!datanode.shutdownForUpgrade) {
  return;
 }
 for (Peer p : peers.keySet()) {
  try {
   peersXceiver.get(p).sendOOB();
  } catch (IOException e) {
   LOG.warn("Got error when sending OOB message.", e);
  } catch (InterruptedException e) {
   LOG.warn("Interrupted when sending OOB message.");
  }
 }
}

public synchronized void sendOOBToPeers() {
 if (!datanode.shutdownForUpgrade) {
  return;
 }
 for (Peer p : peers.keySet()) {
  try {
   peersXceiver.get(p).sendOOB();
  } catch (IOException e) {
   LOG.warn("Got error when sending OOB message.", e);
  } catch (InterruptedException e) {
   LOG.warn("Interrupted when sending OOB message.");
  }
 }
}

public synchronized void sendOOBToPeers() {
 if (!datanode.shutdownForUpgrade) {
  return;
 }
 for (Peer p : peers.keySet()) {
  try {
   peersXceiver.get(p).sendOOB();
  } catch (IOException e) {
   LOG.warn("Got error when sending OOB message.", e);
  } catch (InterruptedException e) {
   LOG.warn("Interrupted when sending OOB message.");
  }
 }
}