Ejemplo n.º 1
0
  /**
   * Bounce the master, causing replica1 to switch roles with the master. If a higher appVersion is
   * specified, the bounced node will also be upgraded.
   */
  private void bounceMaster(final int appVersion) throws Exception {

    /* Disable updates to RepGroupDB due to LocalCBVLSN updates. */
    LocalCBVLSNUpdater.setSuppressGroupDBUpdates(true);

    for (RepEnvInfo info : repEnvInfo) {
      if (info.getEnv() == masterEnv) {

        /*
         * Sync up the replication group so that node2 doesn't do
         * hard recovery.
         */
        RepTestUtils.syncGroupToLastCommit(repEnvInfo, repEnvInfo.length);
        /* Disable replay on replicas. */
        shutdownFeeder(info.getRepNode(), replicaEnv1);
        shutdownFeeder(info.getRepNode(), replicaEnv2);

        /* Close the master. */
        masterApp.close();
        masterApp = null;
        info.closeEnv();
        masterEnv = null;

        /* Force repEnvInfo[2] to the master. */
        WaitForMasterListener masterWaiter = new WaitForMasterListener();
        replicaEnv2.setStateChangeListener(masterWaiter);
        RepNode repNode = repEnvInfo[2].getRepNode();
        repNode.forceMaster(true);
        /* Enable the LocalCBVLSN updates. */
        LocalCBVLSNUpdater.setSuppressGroupDBUpdates(false);
        masterWaiter.awaitMastership();
        assertTrue(repNode.isMaster());
        masterEnv = replicaEnv2;

        /* Replica2 was elected, swap names with replica1. */
        final ReplicatedEnvironment tmpEnv = replicaEnv1;
        replicaEnv1 = replicaEnv2;
        replicaEnv2 = tmpEnv;
        final AppInterface tmpApp = replicaApp1;
        replicaApp1 = replicaApp2;
        replicaApp2 = tmpApp;

        /* Replica1 (or 2, see above) has been elected master. */
        masterApp = newAppObject(appVersion);
        masterApp.adopt(replicaApp1);
        /* Former master (just upgraded) becomes replica1. */
        replicaEnv1 = info.openEnv();
        replicaApp1.open(replicaEnv1);
        break;
      }
    }
    assertNotNull(masterApp);
    assertSame(masterEnv.getState(), ReplicatedEnvironment.State.MASTER);
  }
  /**
   * This is really multiple tests in one. It tests network restore with a replica in each of the
   * following three states:
   *
   * <p>1) A brand new node joining the group and needing a network restore.
   *
   * <p>2) An existing node with its own unique log needing a network restore.
   *
   * <p>3) Repeated network restores, reflecting a mature node.
   */
  @Test
  public void testBasic() throws DatabaseException, Exception {

    /*
     * The cleaner thread can see InsufficientLogExceptions so just stifle
     * those exceptions from stderr.
     */
    DaemonThread.stifleExceptionChatter = true;

    configureForMaxCleaning(2);

    final RepEnvInfo info1 = repEnvInfo[0];
    RepEnvInfo info2 = repEnvInfo[1];

    ReplicatedEnvironment masterRep = info1.openEnv();
    Environment menv = masterRep;
    EnvironmentMutableConfig mconfig = menv.getMutableConfig();
    mconfig.setConfigParam(EnvironmentParams.ENV_RUN_CLEANER.getName(), "false");
    menv.setMutableConfig(mconfig);

    /*
     * Have just the master join first. We do this to test the special case
     * of a brand new node joining a group and needing VLSN 1. The same
     * node then rejoins with its VLSN > 1 to test subsequent rejoins
     * where the node has already participated in the replication.
     */
    populateDB(masterRep, TEST_DB_NAME, 100);

    mconfig = menv.getMutableConfig();
    mconfig.setConfigParam(EnvironmentParams.ENV_RUN_CLEANER.getName(), "true");
    menv.setMutableConfig(mconfig);

    File cenvDir = info2.getEnvHome();
    final int cid = 2;

    for (int i = 0; i < RESTORE_CYCLES; i++) {

      leaveGroupAllButMaster();
      shiftVLSNRight(masterRep);
      RepNodeImpl memberPrev =
          info1.getRepNode().getGroup().getMember(info2.getRepConfig().getNodeName());
      /* Node1 is not known on the first iteration. */
      final VLSN prevSync = (i == 0) ? null : memberPrev.getBarrierState().getLastCBVLSN();
      try {
        /* Should force a network restore. */
        setExceptionListener(info2);
        info2.openEnv();
        fail("exception expected");
      } catch (InsufficientLogException e) {
        RepNodeImpl member =
            info1.getRepNode().getGroup().getMember(info2.getRepConfig().getNodeName());

        /*
         * The sync state should have been advanced to help contribute
         * to the global CBVLSN and prevent it from advancing.
         */
        final VLSN currSync = member.getBarrierState().getLastCBVLSN();
        assertTrue((i == 0) || currSync.compareTo(prevSync) >= 0);

        NetworkRestore networkRestore = new NetworkRestore();
        networkRestore.execute(e, new NetworkRestoreConfig());
        final NetworkBackupStats stats = networkRestore.getNetworkBackupStats();
        assertThat(stats.getExpectedBytes(), greaterThan(0));
        assertThat(stats.getTransferredBytes(), greaterThan(0));
        /* Create a replacement replicator. */
        info2 = RepTestUtils.setupEnvInfo(cenvDir, RepTestUtils.DEFAULT_DURABILITY, cid, info1);
        setExceptionListener(info2);
        info2.openEnv();
      }
      /* Verify that we can continue with the "restored" log files. */
      populateDB(masterRep, TEST_DB_NAME, 100, 100);
      VLSN commitVLSN = RepTestUtils.syncGroupToLastCommit(repEnvInfo, 2);
      RepTestUtils.checkNodeEquality(commitVLSN, false, repEnvInfo);
      info2.closeEnv();
    }
  }