@Override
public Configuration getPeerConf(String peerId) throws ReplicationException {
String znode = ZKUtil.joinZNode(this.peersZNode, peerId);
byte[] data = null;
try {
data = ZKUtil.getData(this.zookeeper, znode);
} catch (KeeperException e) {
throw new ReplicationException("Error getting configuration for peer with id=" + peerId, e);
}
if (data == null) {
LOG.error("Could not get configuration for peer because it doesn't exist. peerId=" + peerId);
return null;
}
String otherClusterKey = "";
try {
otherClusterKey = parsePeerFrom(data);
} catch (DeserializationException e) {
LOG.warn(
"Failed to parse cluster key from peerId="
+ peerId
+ ", specifically the content from the following znode: "
+ znode);
return null;
}
Configuration otherConf = new Configuration(this.conf);
try {
ZKUtil.applyClusterKeyToConf(otherConf, otherClusterKey);
} catch (IOException e) {
LOG.error("Can't get peer configuration for peerId=" + peerId + " because:", e);
return null;
}
return otherConf;
}
private List<ReplicationPeer> listValidReplicationPeers() {
Map<String, ReplicationPeerConfig> peers = listPeerConfigs();
if (peers == null || peers.size() <= 0) {
return null;
}
List<ReplicationPeer> validPeers = new ArrayList<ReplicationPeer>(peers.size());
for (Entry<String, ReplicationPeerConfig> peerEntry : peers.entrySet()) {
String peerId = peerEntry.getKey();
String clusterKey = peerEntry.getValue().getClusterKey();
Configuration peerConf = new Configuration(this.connection.getConfiguration());
Stat s = null;
try {
ZKUtil.applyClusterKeyToConf(peerConf, clusterKey);
Pair<ReplicationPeerConfig, Configuration> pair = this.replicationPeers.getPeerConf(peerId);
ReplicationPeer peer = new ReplicationPeerZKImpl(peerConf, peerId, pair.getFirst());
s =
zkw.getRecoverableZooKeeper()
.exists(peerConf.get(HConstants.ZOOKEEPER_ZNODE_PARENT), null);
if (null == s) {
LOG.info(peerId + ' ' + clusterKey + " is invalid now.");
continue;
}
validPeers.add(peer);
} catch (ReplicationException e) {
LOG.warn(
"Failed to get valid replication peers. "
+ "Error connecting to peer cluster with peerId="
+ peerId);
LOG.debug("Failure details to get valid replication peers.", e);
continue;
} catch (KeeperException e) {
LOG.warn(
"Failed to get valid replication peers. KeeperException code=" + e.code().intValue());
LOG.debug("Failure details to get valid replication peers.", e);
continue;
} catch (InterruptedException e) {
LOG.warn("Failed to get valid replication peers due to InterruptedException.");
LOG.debug("Failure details to get valid replication peers.", e);
Thread.currentThread().interrupt();
continue;
} catch (IOException e) {
LOG.warn("Failed to get valid replication peers due to IOException.");
LOG.debug("Failure details to get valid replication peers.", e);
continue;
}
}
return validPeers;
}