/** Restart a dead avatar node as a standby avatar. */
public void restartStandby(int nnIndex) throws IOException {
AvatarInfo dead = getDeadAvatar(nnIndex);
if (getPrimaryAvatar(nnIndex) == null || dead == null) {
throw new IOException("cannot start standby avatar: " + "primary or dead avatar not found");
}
LOG.info("restarting " + dead.startupOption + " as standby");
NameNodeInfo nni = this.nameNodes[nnIndex];
String[] args;
ArrayList<String> argList = new ArrayList<String>();
argList.add(dead.startupOption);
argList.add(AvatarConstants.StartupOption.STANDBY.getName());
argList.add(AvatarConstants.StartupOption.REGULAR.getName());
if (federation) {
argList.add(StartupOption.SERVICE.getName());
argList.add(nni.nameserviceId);
}
args = new String[argList.size()];
argList.toArray(args);
dead.avatar = AvatarNode.createAvatarNode(args, getServerConf(dead.startupOption, nni));
dead.state = AvatarState.STANDBY;
if (dead.avatar == null) {
throw new IOException("cannot start avatar node");
}
}
/** Check if ingest of the given node is running */
public static boolean isIngestAlive(AvatarNode node) throws IOException {
try {
if (node.reportAvatar() == Avatar.ACTIVE) {
return false;
}
Standby s = node.getStandby();
Field ingestThreadField;
ingestThreadField = Standby.class.getDeclaredField("ingestThread");
ingestThreadField.setAccessible(true);
Thread ingest = (Thread) ingestThreadField.get(s);
return ingest.isAlive();
} catch (Throwable t) {
LOG.warn("Exception: ", t);
throw new IOException("Failed to check ingest state");
}
}
private void startAvatarNode(NameNodeInfo nni) throws IOException {
registerZooKeeperNode(nni.nn0Port, nni.nnDn0Port, nni.http0Port, nni.rpc0Port, nni);
if (format) {
LOG.info("formatting");
// Start the NameNode
String[] a0FormatArgs;
ArrayList<String> argList = new ArrayList<String>();
argList.add(AvatarConstants.StartupOption.NODEZERO.getName());
argList.add(AvatarConstants.StartupOption.FORMATFORCE.getName());
if (federation) {
argList.add(StartupOption.SERVICE.getName());
argList.add(nni.nameserviceId);
}
a0FormatArgs = new String[argList.size()];
argList.toArray(a0FormatArgs);
AvatarNode.createAvatarNode(
a0FormatArgs, getServerConf(AvatarConstants.StartupOption.NODEZERO.getName(), nni));
}
ArrayList<AvatarInfo> avatars = new ArrayList<AvatarInfo>(2);
{
LOG.info("starting avatar 0");
String[] a0Args;
ArrayList<String> argList = new ArrayList<String>();
argList.add(AvatarConstants.StartupOption.NODEZERO.getName());
if (federation) {
argList.add(StartupOption.SERVICE.getName());
argList.add(nni.nameserviceId);
}
a0Args = new String[argList.size()];
argList.toArray(a0Args);
AvatarNode a0 =
AvatarNode.createAvatarNode(
a0Args, getServerConf(AvatarConstants.StartupOption.NODEZERO.getName(), nni));
// leave safe mode manually
a0.setSafeMode(FSConstants.SafeModeAction.SAFEMODE_LEAVE);
avatars.add(
new AvatarInfo(
a0,
AvatarState.ACTIVE,
nni.nn0Port,
nni.nnDn0Port,
nni.http0Port,
nni.rpc0Port,
AvatarConstants.StartupOption.NODEZERO.getName()));
}
{
LOG.info("starting avatar 1");
String[] a1Args;
ArrayList<String> argList = new ArrayList<String>();
argList.add(AvatarConstants.StartupOption.NODEONE.getName());
argList.add(AvatarConstants.StartupOption.STANDBY.getName());
argList.add(AvatarConstants.StartupOption.REGULAR.getName());
if (federation) {
argList.add(StartupOption.SERVICE.getName());
argList.add(nni.nameserviceId);
}
a1Args = new String[argList.size()];
argList.toArray(a1Args);
avatars.add(
new AvatarInfo(
AvatarNode.createAvatarNode(
a1Args, getServerConf(AvatarConstants.StartupOption.NODEONE.getName(), nni)),
AvatarState.STANDBY,
nni.nn1Port,
nni.nnDn1Port,
nni.http1Port,
nni.rpc1Port,
AvatarConstants.StartupOption.NODEONE.getName()));
}
for (AvatarInfo avatar : avatars) {
if (avatar.avatar == null) {
throw new IOException("Cannot create avatar nodes");
}
}
nni.setAvatarNodes(avatars);
DFSUtil.setGenericConf(nni.conf, nni.nameserviceId, AvatarNode.AVATARSERVICE_SPECIFIC_KEYS);
nni.updateAvatarConf(nni.conf);
}