Examples with StaleAppendRequestException com.hazelcast.cp.exception.StaleAppendRequestException used on opensource projects

Example 1 with StaleAppendRequestException

use of com.hazelcast.cp.exception.StaleAppendRequestException in project hazelcast by hazelcast.

the class LocalRaftTest method when_leaderStaysInMinority_then_itDemotesItselfToFollower.

@Test
public void when_leaderStaysInMinority_then_itDemotesItselfToFollower() {
    group = newGroup(3);
    group.start();
    RaftNodeImpl leader = group.waitUntilLeaderElected();
    group.split(leader.getLocalMember());
    InternalCompletableFuture f = leader.replicate(new ApplyRaftRunnable("val"));
    try {
        f.joinInternal();
        fail();
    } catch (StaleAppendRequestException ignored) {
    }
}

Example 2 with StaleAppendRequestException

use of com.hazelcast.cp.exception.StaleAppendRequestException in project hazelcast by hazelcast.

the class RaftNodeImpl method installSnapshot.

/**
 * Restores the snapshot sent by the leader if it's not applied before.
 *
 * @return true if snapshot is restored, false otherwise.
 */
public boolean installSnapshot(SnapshotEntry snapshot) {
    long commitIndex = state.commitIndex();
    if (commitIndex > snapshot.index()) {
        logger.info("Ignored stale " + snapshot + ", commit index at: " + commitIndex);
        return false;
    } else if (commitIndex == snapshot.index()) {
        logger.info("Ignored " + snapshot + " since commit index is same.");
        return true;
    }
    state.commitIndex(snapshot.index());
    RaftLog raftLog = state.log();
    int truncated = raftLog.setSnapshot(snapshot);
    raftLog.flush();
    if (truncated > 0) {
        logger.info(truncated + " entries are truncated to install " + snapshot);
    }
    raftIntegration.restoreSnapshot(snapshot.operation(), snapshot.index());
    // If I am installing a snapshot, it means I am still present in the last member list,
    // but it is possible that the last entry I appended before the snapshot could be a membership change.
    // Because of this, I need to update my status.
    // Nevertheless, I may not be present in the restored member list, which is ok.
    setStatus(ACTIVE);
    state.restoreGroupMembers(snapshot.groupMembersLogIndex(), snapshot.groupMembers());
    printMemberState();
    state.lastApplied(snapshot.index());
    invalidateFuturesUntil(snapshot.index(), new StaleAppendRequestException(state.leader()));
    logger.info(snapshot + " is installed.");
    return true;
}

Example 3 with StaleAppendRequestException

use of com.hazelcast.cp.exception.StaleAppendRequestException in project hazelcast by hazelcast.

the class SnapshotTest method when_isolatedLeaderAppendsEntries_then_itInvalidatesTheirFeaturesUponInstallSnapshot.

@Test
public void when_isolatedLeaderAppendsEntries_then_itInvalidatesTheirFeaturesUponInstallSnapshot() throws ExecutionException, InterruptedException {
    int entryCount = 50;
    RaftAlgorithmConfig config = new RaftAlgorithmConfig().setCommitIndexAdvanceCountToSnapshot(entryCount);
    group = newGroup(3, config);
    group.start();
    RaftNodeImpl leader = group.waitUntilLeaderElected();
    RaftNodeImpl[] followers = group.getNodesExcept(leader.getLocalMember());
    for (int i = 0; i < 40; i++) {
        leader.replicate(new ApplyRaftRunnable("val" + i)).get();
    }
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : group.getNodes()) {
            assertEquals(40, getCommitIndex(raftNode));
        }
    });
    group.split(leader.getLocalMember());
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : followers) {
            RaftEndpoint leaderEndpoint = getLeaderMember(raftNode);
            assertNotNull(leaderEndpoint);
            assertNotEquals(leader.getLocalMember(), leaderEndpoint);
        }
    });
    List<InternalCompletableFuture> futures = new ArrayList<>();
    for (int i = 40; i < 45; i++) {
        InternalCompletableFuture f = leader.replicate(new ApplyRaftRunnable("isolated" + i));
        futures.add(f);
    }
    RaftNodeImpl newLeader = group.getNode(getLeaderMember(followers[0]));
    for (int i = 40; i < 51; i++) {
        newLeader.replicate(new ApplyRaftRunnable("val" + i)).get();
    }
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : followers) {
            assertTrue(getSnapshotEntry(raftNode).index() > 0);
        }
    });
    group.dropMessagesToMember(leader.getLocalMember(), followers[0].getLocalMember(), AppendRequest.class);
    group.dropMessagesToMember(leader.getLocalMember(), followers[1].getLocalMember(), AppendRequest.class);
    group.merge();
    for (InternalCompletableFuture f : futures) {
        try {
            f.joinInternal();
            fail();
        } catch (StaleAppendRequestException ignored) {
        }
    }
    assertTrueEventually(() -> {
        for (RaftNodeImpl raftNode : group.getNodes()) {
            assertEquals(51, getCommitIndex(raftNode));
            RaftDataService service = group.getService(raftNode);
            assertEquals(51, service.size());
            for (int i = 0; i < 51; i++) {
                assertEquals(("val" + i), service.get(i + 1));
            }
        }
    });
}