/** Make sure ephemerals get cleaned up when a session times out. */
@Test
public void testSessionTimeout() throws Exception {
final int TIMEOUT = 5000;
DisconnectableZooKeeper zk = createClient(TIMEOUT);
zk.create("/stest", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
zk.disconnect();
Thread.sleep(TIMEOUT * 2);
zk = createClient(TIMEOUT);
zk.create("/stest", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
tearDown();
zk.close();
zk.disconnect();
setUp();
zk = createClient(TIMEOUT);
Assert.assertTrue(zk.exists("/stest", false) != null);
Thread.sleep(TIMEOUT * 2);
Assert.assertTrue(zk.exists("/stest", false) == null);
zk.close();
}
@Test
public void testMinMaxSessionTimeout() throws Exception {
// override the defaults
final int MINSESS = 20000;
final int MAXSESS = 240000;
ZooKeeperServer zs = serverFactory.getZooKeeperServer();
zs.setMinSessionTimeout(MINSESS);
zs.setMaxSessionTimeout(MAXSESS);
// validate typical case - requested == negotiated
int timeout = 120000;
DisconnectableZooKeeper zk = createClient(timeout);
Assert.assertEquals(timeout, zk.getSessionTimeout());
// make sure tostring works in both cases
LOG.info(zk.toString());
zk.close();
LOG.info(zk.toString());
// validate lower limit
zk = createClient(MINSESS / 2);
Assert.assertEquals(MINSESS, zk.getSessionTimeout());
LOG.info(zk.toString());
zk.close();
LOG.info(zk.toString());
// validate upper limit
zk = createClient(MAXSESS * 2);
Assert.assertEquals(MAXSESS, zk.getSessionTimeout());
LOG.info(zk.toString());
zk.close();
LOG.info(zk.toString());
}
/** Verify access to the negotiated session timeout. */
@Test
public void testSessionTimeoutAccess() throws Exception {
// validate typical case - requested == negotiated
DisconnectableZooKeeper zk = createClient(TICK_TIME * 4);
Assert.assertEquals(TICK_TIME * 4, zk.getSessionTimeout());
// make sure tostring works in both cases
LOG.info(zk.toString());
zk.close();
LOG.info(zk.toString());
// validate lower limit
zk = createClient(TICK_TIME);
Assert.assertEquals(TICK_TIME * 2, zk.getSessionTimeout());
LOG.info(zk.toString());
zk.close();
LOG.info(zk.toString());
// validate upper limit
zk = createClient(TICK_TIME * 30);
Assert.assertEquals(TICK_TIME * 20, zk.getSessionTimeout());
LOG.info(zk.toString());
zk.close();
LOG.info(zk.toString());
}
/**
* This test verifies that when the session id is reused, and the original client is disconnected,
* but not session closed, that the server will remove ephemeral nodes created by the original
* session.
*/
@Test
public void testSession() throws IOException, InterruptedException, KeeperException {
DisconnectableZooKeeper zk = createClient();
zk.create("/e", new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
LOG.info("zk with session id 0x" + Long.toHexString(zk.getSessionId()) + " was destroyed!");
// disconnect the client by killing the socket, not sending the
// session disconnect to the server as usual. This allows the test
// to verify disconnect handling
zk.disconnect();
Stat stat = new Stat();
startSignal = new CountDownLatch(1);
zk =
new DisconnectableZooKeeper(
HOSTPORT, CONNECTION_TIMEOUT, this, zk.getSessionId(), zk.getSessionPasswd());
startSignal.await();
LOG.info("zk with session id 0x" + Long.toHexString(zk.getSessionId()) + " was created!");
zk.getData("/e", false, stat);
LOG.info("After get data /e");
zk.close();
zk = createClient();
Assert.assertEquals(null, zk.exists("/e", false));
LOG.info("before close zk with session id 0x" + Long.toHexString(zk.getSessionId()) + "!");
zk.close();
}