Examples with KeeperException org.apache.zookeeper_voltpatches.KeeperException used on opensource projects

Example 6 with KeeperException

use of org.apache.zookeeper_voltpatches.KeeperException in project voltdb by VoltDB.

the class LeaderCache method processChildEvent.

/**
     * Update a modified child and republish a new snapshot. This may indicate
     * a deleted child or a child with modified data.
     */
private void processChildEvent(WatchedEvent event) throws Exception {
    HashMap<Integer, Long> cacheCopy = new HashMap<Integer, Long>(m_publicCache);
    ByteArrayCallback cb = new ByteArrayCallback();
    m_zk.getData(event.getPath(), m_childWatch, cb, null);
    try {
        // cb.getData() and cb.getPath() throw KeeperException
        byte[] payload = cb.getData();
        long HSId = Long.valueOf(new String(payload, "UTF-8"));
        cacheCopy.put(getPartitionIdFromZKPath(cb.getPath()), HSId);
    } catch (KeeperException.NoNodeException e) {
        // rtb: I think result's path is the same as cb.getPath()?
        cacheCopy.remove(getPartitionIdFromZKPath(event.getPath()));
    }
    m_publicCache = ImmutableMap.copyOf(cacheCopy);
    if (m_cb != null) {
        m_cb.run(m_publicCache);
    }
}

Example 7 with KeeperException

use of org.apache.zookeeper_voltpatches.KeeperException in project voltdb by VoltDB.

the class ClusterSettingsRef method store.

public int store(ZooKeeper zk) {
    Stat stat = null;
    int[] stamp = new int[] { 0 };
    ClusterSettings settings = get(stamp);
    try {
        // at this stage zookeeper is one version behind
        stat = zk.setData(VoltZK.cluster_settings, settings.asBytes(), stamp[0] - 1);
    } catch (KeeperException | InterruptedException e) {
        throw new SettingsException("Failed to store to ZooKeeper", e);
    }
    return stat.getVersion();
}

Example 8 with KeeperException

use of org.apache.zookeeper_voltpatches.KeeperException in project voltdb by VoltDB.

the class TopologyZKUtils method updateTopologyToZK.

public static void updateTopologyToZK(ZooKeeper zk, AbstractTopology topology) {
    Stat stat = new Stat();
    try {
        zk.getData(VoltZK.topology, false, stat);
        byte[] payload = topology.topologyToJSON().toString().getBytes(Charsets.UTF_8);
        zk.setData(VoltZK.topology, payload, stat.getVersion());
    } catch (KeeperException | InterruptedException | JSONException e) {
        VoltDB.crashLocalVoltDB("Unable to update topology to ZK, dying", true, e);
    }
}

Example 9 with KeeperException

use of org.apache.zookeeper_voltpatches.KeeperException in project voltdb by VoltDB.

the class MeshProber method considerMeshPlea.

@Override
public JoinAcceptor.PleaDecision considerMeshPlea(ZooKeeper zk, int hostId, JSONObject jo) {
    checkArgument(zk != null, "zookeeper is null");
    checkArgument(jo != null, "json object is null");
    if (!HostCriteria.hasCriteria(jo)) {
        return new JoinAcceptor.PleaDecision(String.format("Joining node version %s is incompatible with this node verion %s", jo.optString(SocketJoiner.VERSION_STRING, "(unknown)"), m_versionChecker.getVersionString()), false, false);
    }
    HostCriteria hc = new HostCriteria(jo);
    Map<Integer, HostCriteria> hostCriteria = m_hostCriteria.get();
    // when the cluster is forming anew)
    if (!getNodeState().operational() && !hostCriteria.values().stream().anyMatch(c -> c.getNodeState().operational())) {
        List<String> incompatibilities = asHostCriteria().listIncompatibilities(hc);
        if (!incompatibilities.isEmpty()) {
            Joiner joiner = Joiner.on("\n    ").skipNulls();
            String error = "Incompatible joining criteria:\n    " + joiner.join(incompatibilities);
            return new JoinAcceptor.PleaDecision(error, false, false);
        }
        return new JoinAcceptor.PleaDecision(null, true, false);
    } else {
        StartAction operationalStartAction = hostCriteria.values().stream().filter(c -> c.getNodeState().operational()).map(c -> c.getStartAction()).findFirst().orElse(getStartAction());
        if (operationalStartAction == StartAction.PROBE && hc.getStartAction() != StartAction.PROBE) {
            String msg = "Invalid VoltDB command. Please use init and start to join this cluster";
            return new JoinAcceptor.PleaDecision(msg, false, false);
        }
    }
    // how many hosts are already in the mesh?
    Stat stat = new Stat();
    try {
        zk.getChildren(CoreZK.hosts, false, stat);
    } catch (InterruptedException e) {
        String msg = "Interrupted while considering mesh plea";
        m_networkLog.error(msg, e);
        return new JoinAcceptor.PleaDecision(msg, false, false);
    } catch (KeeperException e) {
        EnumSet<KeeperException.Code> closing = EnumSet.of(KeeperException.Code.SESSIONEXPIRED, KeeperException.Code.CONNECTIONLOSS);
        if (closing.contains(e.code())) {
            return new JoinAcceptor.PleaDecision("Shutting down", false, false);
        } else {
            String msg = "Failed to list hosts while considering a mesh plea";
            m_networkLog.error(msg, e);
            return new JoinAcceptor.PleaDecision(msg, false, false);
        }
    }
    // connecting to already wholly formed cluster
    if (stat.getNumChildren() >= getHostCount()) {
        return new JoinAcceptor.PleaDecision(hc.isAddAllowed() ? null : "Cluster is already complete", hc.isAddAllowed(), false);
    } else if (stat.getNumChildren() < getHostCount()) {
        // check for concurrent rejoins
        final int rejoiningHost = CoreZK.createRejoinNodeIndicator(zk, hostId);
        if (rejoiningHost == -1) {
            return new JoinAcceptor.PleaDecision(null, true, false);
        } else {
            String msg = "Only one host can rejoin at a time. Host " + rejoiningHost + " is still rejoining.";
            return new JoinAcceptor.PleaDecision(msg, false, true);
        }
    }
    return new JoinAcceptor.PleaDecision(null, true, false);
}

Example 10 with KeeperException

use of org.apache.zookeeper_voltpatches.KeeperException in project voltdb by VoltDB.

the class DataTree method processTxn.

public ProcessTxnResult processTxn(TxnHeader header, Record txn) {
    ProcessTxnResult rc = new ProcessTxnResult();
    String debug = "";
    try {
        rc.clientId = header.getClientId();
        rc.cxid = header.getCxid();
        rc.zxid = header.getZxid();
        rc.type = header.getType();
        rc.err = 0;
        if (rc.zxid > lastProcessedZxid) {
            lastProcessedZxid = rc.zxid;
        }
        switch(header.getType()) {
            case OpCode.create:
                CreateTxn createTxn = (CreateTxn) txn;
                debug = "Create transaction for " + createTxn.getPath();
                createNode(createTxn.getPath(), createTxn.getData(), createTxn.getAcl(), createTxn.getEphemeral() ? header.getClientId() : 0, header.getZxid(), header.getTime());
                rc.path = createTxn.getPath();
                break;
            case OpCode.delete:
                DeleteTxn deleteTxn = (DeleteTxn) txn;
                debug = "Delete transaction for " + deleteTxn.getPath();
                deleteNode(deleteTxn.getPath(), header.getZxid());
                break;
            case OpCode.setData:
                SetDataTxn setDataTxn = (SetDataTxn) txn;
                debug = "Set data for  transaction for " + setDataTxn.getPath();
                rc.stat = setData(setDataTxn.getPath(), setDataTxn.getData(), setDataTxn.getVersion(), header.getZxid(), header.getTime());
                break;
            case OpCode.setACL:
                SetACLTxn setACLTxn = (SetACLTxn) txn;
                debug = "Set ACL for  transaction for " + setACLTxn.getPath();
                rc.stat = setACL(setACLTxn.getPath(), setACLTxn.getAcl(), setACLTxn.getVersion());
                break;
            case OpCode.closeSession:
                killSession(header.getClientId(), header.getZxid());
                break;
            case OpCode.error:
                ErrorTxn errTxn = (ErrorTxn) txn;
                rc.err = errTxn.getErr();
                break;
        }
    } catch (KeeperException e) {
        // These are expected errors since we take a lazy snapshot
        if (initialized || (e.code() != Code.NONODE && e.code() != Code.NODEEXISTS)) {
            LOG.warn("Failed:" + debug, e);
        }
    }
    return rc;
}