/**
* @return clientPort return clientPort if there is another ZK backup can run when killing the
* current active; return -1, if there is no backups.
*/
public int killCurrentActiveZooKeeperServer() throws IOException, InterruptedException {
if (!started || activeZKServerIndex < 0) {
return -1;
}
// Shutdown the current active one
NIOServerCnxnFactory standaloneServerFactory =
standaloneServerFactoryList.get(activeZKServerIndex);
int clientPort = clientPortList.get(activeZKServerIndex);
standaloneServerFactory.shutdown();
if (!waitForServerDown(clientPort, CONNECTION_TIMEOUT)) {
throw new IOException("Waiting for shutdown of standalone server");
}
// remove the current active zk server
standaloneServerFactoryList.remove(activeZKServerIndex);
clientPortList.remove(activeZKServerIndex);
zooKeeperServers.remove(activeZKServerIndex);
LOG.info(
"Kill the current active ZK servers in the cluster " + "on client port: " + clientPort);
if (standaloneServerFactoryList.size() == 0) {
// there is no backup servers;
return -1;
}
clientPort = clientPortList.get(activeZKServerIndex);
LOG.info("Activate a backup zk server in the cluster " + "on client port: " + clientPort);
// return the next back zk server's port
return clientPort;
}
public void stopZookeeper() {
if (!useZookeeper) {
return;
}
standaloneServerFactory.shutdown();
Utils.rm(zklogdir);
}
public void killServer() throws Exception {
if (zkc != null) {
zkc.close();
}
// shutdown ZK server
if (serverFactory != null) {
serverFactory.shutdown();
assertTrue(
ClientBase.waitForServerDown(getZooKeeperConnectString(), ClientBase.CONNECTION_TIMEOUT),
"waiting for server down");
}
// ServerStats.unregister();
FileUtils.deleteDirectory(ZkTmpDir);
}
/** Kill one back up ZK servers */
public void killOneBackupZooKeeperServer() throws IOException, InterruptedException {
if (!started || activeZKServerIndex < 0 || standaloneServerFactoryList.size() <= 1) {
return;
}
int backupZKServerIndex = activeZKServerIndex + 1;
// Shutdown the current active one
NIOServerCnxnFactory standaloneServerFactory =
standaloneServerFactoryList.get(backupZKServerIndex);
int clientPort = clientPortList.get(backupZKServerIndex);
standaloneServerFactory.shutdown();
if (!waitForServerDown(clientPort, CONNECTION_TIMEOUT)) {
throw new IOException("Waiting for shutdown of standalone server");
}
// remove this backup zk server
standaloneServerFactoryList.remove(backupZKServerIndex);
clientPortList.remove(backupZKServerIndex);
zooKeeperServers.remove(backupZKServerIndex);
LOG.info("Kill one backup ZK servers in the cluster " + "on client port: " + clientPort);
}
/** @throws IOException */
public void shutdown() throws IOException {
if (!started) {
return;
}
// shut down all the zk servers
for (int i = 0; i < standaloneServerFactoryList.size(); i++) {
NIOServerCnxnFactory standaloneServerFactory = standaloneServerFactoryList.get(i);
int clientPort = clientPortList.get(i);
standaloneServerFactory.shutdown();
if (!waitForServerDown(clientPort, CONNECTION_TIMEOUT)) {
throw new IOException("Waiting for shutdown of standalone server");
}
}
// clear everything
started = false;
activeZKServerIndex = 0;
standaloneServerFactoryList.clear();
clientPortList.clear();
zooKeeperServers.clear();
LOG.info("Shutdown MiniZK cluster with all ZK servers");
}