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Example 6 with GetDataRequest

use of org.apache.zookeeper.proto.GetDataRequest in project zookeeper by apache.

the class FinalRequestProcessor method processRequest.

public void processRequest(Request request) {
    if (LOG.isDebugEnabled()) {
        LOG.debug("Processing request:: " + request);
    }
    // request.addRQRec(">final");
    long traceMask = ZooTrace.CLIENT_REQUEST_TRACE_MASK;
    if (request.type == OpCode.ping) {
        traceMask = ZooTrace.SERVER_PING_TRACE_MASK;
    }
    if (LOG.isTraceEnabled()) {
        ZooTrace.logRequest(LOG, traceMask, 'E', request, "");
    }
    ProcessTxnResult rc = null;
    synchronized (zks.outstandingChanges) {
        // Need to process local session requests
        rc = zks.processTxn(request);
        // that add to outstandingChanges.
        if (request.getHdr() != null) {
            TxnHeader hdr = request.getHdr();
            Record txn = request.getTxn();
            long zxid = hdr.getZxid();
            while (!zks.outstandingChanges.isEmpty() && zks.outstandingChanges.get(0).zxid <= zxid) {
                ChangeRecord cr = zks.outstandingChanges.remove(0);
                if (cr.zxid < zxid) {
                    LOG.warn("Zxid outstanding " + cr.zxid + " is less than current " + zxid);
                }
                if (zks.outstandingChangesForPath.get(cr.path) == cr) {
                    zks.outstandingChangesForPath.remove(cr.path);
                }
            }
        }
        // do not add non quorum packets to the queue.
        if (request.isQuorum()) {
            zks.getZKDatabase().addCommittedProposal(request);
        }
    }
    // Calling closeSession() after losing the cnxn, results in the client close session response being dropped.
    if (request.type == OpCode.closeSession && connClosedByClient(request)) {
        // we are just playing diffs from the leader.
        if (closeSession(zks.serverCnxnFactory, request.sessionId) || closeSession(zks.secureServerCnxnFactory, request.sessionId)) {
            return;
        }
    }
    if (request.cnxn == null) {
        return;
    }
    ServerCnxn cnxn = request.cnxn;
    String lastOp = "NA";
    zks.decInProcess();
    Code err = Code.OK;
    Record rsp = null;
    try {
        if (request.getHdr() != null && request.getHdr().getType() == OpCode.error) {
            /*
                 * When local session upgrading is disabled, leader will
                 * reject the ephemeral node creation due to session expire.
                 * However, if this is the follower that issue the request,
                 * it will have the correct error code, so we should use that
                 * and report to user
                 */
            if (request.getException() != null) {
                throw request.getException();
            } else {
                throw KeeperException.create(KeeperException.Code.get(((ErrorTxn) request.getTxn()).getErr()));
            }
        }
        KeeperException ke = request.getException();
        if (ke != null && request.type != OpCode.multi) {
            throw ke;
        }
        if (LOG.isDebugEnabled()) {
            LOG.debug("{}", request);
        }
        switch(request.type) {
            case OpCode.ping:
                {
                    zks.serverStats().updateLatency(request.createTime);
                    lastOp = "PING";
                    cnxn.updateStatsForResponse(request.cxid, request.zxid, lastOp, request.createTime, Time.currentElapsedTime());
                    cnxn.sendResponse(new ReplyHeader(-2, zks.getZKDatabase().getDataTreeLastProcessedZxid(), 0), null, "response");
                    return;
                }
            case OpCode.createSession:
                {
                    zks.serverStats().updateLatency(request.createTime);
                    lastOp = "SESS";
                    cnxn.updateStatsForResponse(request.cxid, request.zxid, lastOp, request.createTime, Time.currentElapsedTime());
                    zks.finishSessionInit(request.cnxn, true);
                    return;
                }
            case OpCode.multi:
                {
                    lastOp = "MULT";
                    rsp = new MultiResponse();
                    for (ProcessTxnResult subTxnResult : rc.multiResult) {
                        OpResult subResult;
                        switch(subTxnResult.type) {
                            case OpCode.check:
                                subResult = new CheckResult();
                                break;
                            case OpCode.create:
                                subResult = new CreateResult(subTxnResult.path);
                                break;
                            case OpCode.create2:
                            case OpCode.createTTL:
                            case OpCode.createContainer:
                                subResult = new CreateResult(subTxnResult.path, subTxnResult.stat);
                                break;
                            case OpCode.delete:
                            case OpCode.deleteContainer:
                                subResult = new DeleteResult();
                                break;
                            case OpCode.setData:
                                subResult = new SetDataResult(subTxnResult.stat);
                                break;
                            case OpCode.error:
                                subResult = new ErrorResult(subTxnResult.err);
                                break;
                            default:
                                throw new IOException("Invalid type of op");
                        }
                        ((MultiResponse) rsp).add(subResult);
                    }
                    break;
                }
            case OpCode.create:
                {
                    lastOp = "CREA";
                    rsp = new CreateResponse(rc.path);
                    err = Code.get(rc.err);
                    break;
                }
            case OpCode.create2:
            case OpCode.createTTL:
            case OpCode.createContainer:
                {
                    lastOp = "CREA";
                    rsp = new Create2Response(rc.path, rc.stat);
                    err = Code.get(rc.err);
                    break;
                }
            case OpCode.delete:
            case OpCode.deleteContainer:
                {
                    lastOp = "DELE";
                    err = Code.get(rc.err);
                    break;
                }
            case OpCode.setData:
                {
                    lastOp = "SETD";
                    rsp = new SetDataResponse(rc.stat);
                    err = Code.get(rc.err);
                    break;
                }
            case OpCode.reconfig:
                {
                    lastOp = "RECO";
                    rsp = new GetDataResponse(((QuorumZooKeeperServer) zks).self.getQuorumVerifier().toString().getBytes(), rc.stat);
                    err = Code.get(rc.err);
                    break;
                }
            case OpCode.setACL:
                {
                    lastOp = "SETA";
                    rsp = new SetACLResponse(rc.stat);
                    err = Code.get(rc.err);
                    break;
                }
            case OpCode.closeSession:
                {
                    lastOp = "CLOS";
                    err = Code.get(rc.err);
                    break;
                }
            case OpCode.sync:
                {
                    lastOp = "SYNC";
                    SyncRequest syncRequest = new SyncRequest();
                    ByteBufferInputStream.byteBuffer2Record(request.request, syncRequest);
                    rsp = new SyncResponse(syncRequest.getPath());
                    break;
                }
            case OpCode.check:
                {
                    lastOp = "CHEC";
                    rsp = new SetDataResponse(rc.stat);
                    err = Code.get(rc.err);
                    break;
                }
            case OpCode.exists:
                {
                    lastOp = "EXIS";
                    // TODO we need to figure out the security requirement for this!
                    ExistsRequest existsRequest = new ExistsRequest();
                    ByteBufferInputStream.byteBuffer2Record(request.request, existsRequest);
                    String path = existsRequest.getPath();
                    if (path.indexOf('\0') != -1) {
                        throw new KeeperException.BadArgumentsException();
                    }
                    Stat stat = zks.getZKDatabase().statNode(path, existsRequest.getWatch() ? cnxn : null);
                    rsp = new ExistsResponse(stat);
                    break;
                }
            case OpCode.getData:
                {
                    lastOp = "GETD";
                    GetDataRequest getDataRequest = new GetDataRequest();
                    ByteBufferInputStream.byteBuffer2Record(request.request, getDataRequest);
                    DataNode n = zks.getZKDatabase().getNode(getDataRequest.getPath());
                    if (n == null) {
                        throw new KeeperException.NoNodeException();
                    }
                    PrepRequestProcessor.checkACL(zks, request.cnxn, zks.getZKDatabase().aclForNode(n), ZooDefs.Perms.READ, request.authInfo, getDataRequest.getPath(), null);
                    Stat stat = new Stat();
                    byte[] b = zks.getZKDatabase().getData(getDataRequest.getPath(), stat, getDataRequest.getWatch() ? cnxn : null);
                    rsp = new GetDataResponse(b, stat);
                    break;
                }
            case OpCode.setWatches:
                {
                    lastOp = "SETW";
                    SetWatches setWatches = new SetWatches();
                    // XXX We really should NOT need this!!!!
                    request.request.rewind();
                    ByteBufferInputStream.byteBuffer2Record(request.request, setWatches);
                    long relativeZxid = setWatches.getRelativeZxid();
                    zks.getZKDatabase().setWatches(relativeZxid, setWatches.getDataWatches(), setWatches.getExistWatches(), setWatches.getChildWatches(), cnxn);
                    break;
                }
            case OpCode.getACL:
                {
                    lastOp = "GETA";
                    GetACLRequest getACLRequest = new GetACLRequest();
                    ByteBufferInputStream.byteBuffer2Record(request.request, getACLRequest);
                    Stat stat = new Stat();
                    List<ACL> acl = zks.getZKDatabase().getACL(getACLRequest.getPath(), stat);
                    rsp = new GetACLResponse(acl, stat);
                    break;
                }
            case OpCode.getChildren:
                {
                    lastOp = "GETC";
                    GetChildrenRequest getChildrenRequest = new GetChildrenRequest();
                    ByteBufferInputStream.byteBuffer2Record(request.request, getChildrenRequest);
                    DataNode n = zks.getZKDatabase().getNode(getChildrenRequest.getPath());
                    if (n == null) {
                        throw new KeeperException.NoNodeException();
                    }
                    PrepRequestProcessor.checkACL(zks, request.cnxn, zks.getZKDatabase().aclForNode(n), ZooDefs.Perms.READ, request.authInfo, getChildrenRequest.getPath(), null);
                    List<String> children = zks.getZKDatabase().getChildren(getChildrenRequest.getPath(), null, getChildrenRequest.getWatch() ? cnxn : null);
                    rsp = new GetChildrenResponse(children);
                    break;
                }
            case OpCode.getChildren2:
                {
                    lastOp = "GETC";
                    GetChildren2Request getChildren2Request = new GetChildren2Request();
                    ByteBufferInputStream.byteBuffer2Record(request.request, getChildren2Request);
                    Stat stat = new Stat();
                    DataNode n = zks.getZKDatabase().getNode(getChildren2Request.getPath());
                    if (n == null) {
                        throw new KeeperException.NoNodeException();
                    }
                    PrepRequestProcessor.checkACL(zks, request.cnxn, zks.getZKDatabase().aclForNode(n), ZooDefs.Perms.READ, request.authInfo, getChildren2Request.getPath(), null);
                    List<String> children = zks.getZKDatabase().getChildren(getChildren2Request.getPath(), stat, getChildren2Request.getWatch() ? cnxn : null);
                    rsp = new GetChildren2Response(children, stat);
                    break;
                }
            case OpCode.checkWatches:
                {
                    lastOp = "CHKW";
                    CheckWatchesRequest checkWatches = new CheckWatchesRequest();
                    ByteBufferInputStream.byteBuffer2Record(request.request, checkWatches);
                    WatcherType type = WatcherType.fromInt(checkWatches.getType());
                    boolean containsWatcher = zks.getZKDatabase().containsWatcher(checkWatches.getPath(), type, cnxn);
                    if (!containsWatcher) {
                        String msg = String.format(Locale.ENGLISH, "%s (type: %s)", new Object[] { checkWatches.getPath(), type });
                        throw new KeeperException.NoWatcherException(msg);
                    }
                    break;
                }
            case OpCode.removeWatches:
                {
                    lastOp = "REMW";
                    RemoveWatchesRequest removeWatches = new RemoveWatchesRequest();
                    ByteBufferInputStream.byteBuffer2Record(request.request, removeWatches);
                    WatcherType type = WatcherType.fromInt(removeWatches.getType());
                    boolean removed = zks.getZKDatabase().removeWatch(removeWatches.getPath(), type, cnxn);
                    if (!removed) {
                        String msg = String.format(Locale.ENGLISH, "%s (type: %s)", new Object[] { removeWatches.getPath(), type });
                        throw new KeeperException.NoWatcherException(msg);
                    }
                    break;
                }
        }
    } catch (SessionMovedException e) {
        // session moved is a connection level error, we need to tear
        // down the connection otw ZOOKEEPER-710 might happen
        // ie client on slow follower starts to renew session, fails
        // before this completes, then tries the fast follower (leader)
        // and is successful, however the initial renew is then
        // successfully fwd/processed by the leader and as a result
        // the client and leader disagree on where the client is most
        // recently attached (and therefore invalid SESSION MOVED generated)
        cnxn.sendCloseSession();
        return;
    } catch (KeeperException e) {
        err = e.code();
    } catch (Exception e) {
        // log at error level as we are returning a marshalling
        // error to the user
        LOG.error("Failed to process " + request, e);
        StringBuilder sb = new StringBuilder();
        ByteBuffer bb = request.request;
        bb.rewind();
        while (bb.hasRemaining()) {
            sb.append(Integer.toHexString(bb.get() & 0xff));
        }
        LOG.error("Dumping request buffer: 0x" + sb.toString());
        err = Code.MARSHALLINGERROR;
    }
    long lastZxid = zks.getZKDatabase().getDataTreeLastProcessedZxid();
    ReplyHeader hdr = new ReplyHeader(request.cxid, lastZxid, err.intValue());
    zks.serverStats().updateLatency(request.createTime);
    cnxn.updateStatsForResponse(request.cxid, lastZxid, lastOp, request.createTime, Time.currentElapsedTime());
    try {
        cnxn.sendResponse(hdr, rsp, "response");
        if (request.type == OpCode.closeSession) {
            cnxn.sendCloseSession();
        }
    } catch (IOException e) {
        LOG.error("FIXMSG", e);
    }
}
Also used : MultiResponse(org.apache.zookeeper.MultiResponse) WatcherType(org.apache.zookeeper.Watcher.WatcherType) CreateResponse(org.apache.zookeeper.proto.CreateResponse) GetACLRequest(org.apache.zookeeper.proto.GetACLRequest) ErrorResult(org.apache.zookeeper.OpResult.ErrorResult) ProcessTxnResult(org.apache.zookeeper.server.DataTree.ProcessTxnResult) GetACLResponse(org.apache.zookeeper.proto.GetACLResponse) SetACLResponse(org.apache.zookeeper.proto.SetACLResponse) CreateResult(org.apache.zookeeper.OpResult.CreateResult) OpResult(org.apache.zookeeper.OpResult) CheckResult(org.apache.zookeeper.OpResult.CheckResult) List(java.util.List) GetChildren2Response(org.apache.zookeeper.proto.GetChildren2Response) GetChildren2Request(org.apache.zookeeper.proto.GetChildren2Request) OpCode(org.apache.zookeeper.ZooDefs.OpCode) Code(org.apache.zookeeper.KeeperException.Code) GetChildrenResponse(org.apache.zookeeper.proto.GetChildrenResponse) SyncRequest(org.apache.zookeeper.proto.SyncRequest) SetWatches(org.apache.zookeeper.proto.SetWatches) SessionMovedException(org.apache.zookeeper.KeeperException.SessionMovedException) GetDataResponse(org.apache.zookeeper.proto.GetDataResponse) KeeperException(org.apache.zookeeper.KeeperException) DeleteResult(org.apache.zookeeper.OpResult.DeleteResult) ExistsResponse(org.apache.zookeeper.proto.ExistsResponse) Create2Response(org.apache.zookeeper.proto.Create2Response) SetDataResponse(org.apache.zookeeper.proto.SetDataResponse) RemoveWatchesRequest(org.apache.zookeeper.proto.RemoveWatchesRequest) GetDataRequest(org.apache.zookeeper.proto.GetDataRequest) SetDataResult(org.apache.zookeeper.OpResult.SetDataResult) QuorumZooKeeperServer(org.apache.zookeeper.server.quorum.QuorumZooKeeperServer) Stat(org.apache.zookeeper.data.Stat) SyncResponse(org.apache.zookeeper.proto.SyncResponse) Record(org.apache.jute.Record) ChangeRecord(org.apache.zookeeper.server.ZooKeeperServer.ChangeRecord) ReplyHeader(org.apache.zookeeper.proto.ReplyHeader) ExistsRequest(org.apache.zookeeper.proto.ExistsRequest) GetChildrenRequest(org.apache.zookeeper.proto.GetChildrenRequest) IOException(java.io.IOException) CheckWatchesRequest(org.apache.zookeeper.proto.CheckWatchesRequest) ByteBuffer(java.nio.ByteBuffer) KeeperException(org.apache.zookeeper.KeeperException) IOException(java.io.IOException) SessionMovedException(org.apache.zookeeper.KeeperException.SessionMovedException) ErrorTxn(org.apache.zookeeper.txn.ErrorTxn) ChangeRecord(org.apache.zookeeper.server.ZooKeeperServer.ChangeRecord) TxnHeader(org.apache.zookeeper.txn.TxnHeader)

Example 7 with GetDataRequest

use of org.apache.zookeeper.proto.GetDataRequest in project zookeeper by apache.

the class CommitProcessorConcurrencyTest method processAsMuchUncommittedRequestsAsPossibleTest.

/**
     * Here we create the following requests queue structure: R1_1, W1_2, R1_3,
     * R2_1, R2_2, W2_3, R2_4, R3_1, R3_2, R3_3, W3_4, R3_5, ... , W5_6, R5_7
     * i.e., 5 sessions, each has different amount or read requests, followed by
     * single write and afterwards single read. The idea is to check that all of
     * the reads that can be processed concurrently do so, and that none of the
     * uncommited requests, followed by the reads are processed.
     */
@Test
public void processAsMuchUncommittedRequestsAsPossibleTest() throws Exception {
    final String path = "/testAsMuchAsPossible";
    LinkedList<Request> shouldBeProcessed = new LinkedList<Request>();
    HashSet<Request> shouldNotBeProcessed = new HashSet<Request>();
    for (int sessionId = 1; sessionId <= 5; ++sessionId) {
        for (int readReqId = 1; readReqId <= sessionId; ++readReqId) {
            Request readReq = newRequest(new GetDataRequest(path, false), OpCode.getData, sessionId, readReqId);
            shouldBeProcessed.add(readReq);
            processor.queuedRequests.add(readReq);
        }
        Request writeReq = newRequest(new CreateRequest(path, new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT_SEQUENTIAL.toFlag()), OpCode.create, sessionId, sessionId + 1);
        Request readReq = newRequest(new GetDataRequest(path, false), OpCode.getData, sessionId, sessionId + 2);
        processor.queuedRequests.add(writeReq);
        processor.queuedRequests.add(readReq);
        shouldNotBeProcessed.add(writeReq);
        shouldNotBeProcessed.add(readReq);
    }
    processor.initThreads(defaultSizeOfThreadPool);
    processor.stoppedMainLoop = true;
    processor.run();
    Thread.sleep(1000);
    shouldBeProcessed.removeAll(processedRequests);
    for (Request r : shouldBeProcessed) {
        LOG.error("Did not process " + r);
    }
    Assert.assertTrue("Not all requests were processed", shouldBeProcessed.isEmpty());
    Assert.assertFalse("Processed a wrong request", shouldNotBeProcessed.removeAll(processedRequests));
}
Also used : CreateRequest(org.apache.zookeeper.proto.CreateRequest) GetDataRequest(org.apache.zookeeper.proto.GetDataRequest) CreateRequest(org.apache.zookeeper.proto.CreateRequest) SetDataRequest(org.apache.zookeeper.proto.SetDataRequest) Request(org.apache.zookeeper.server.Request) GetDataRequest(org.apache.zookeeper.proto.GetDataRequest) LinkedList(java.util.LinkedList) HashSet(java.util.HashSet) Test(org.junit.Test)

Example 8 with GetDataRequest

use of org.apache.zookeeper.proto.GetDataRequest in project zookeeper by apache.

the class CommitProcessorConcurrencyTest method processAllFollowingUncommittedAfterFirstCommitTest.

/**
     * In the following test, we add a write request followed by several read
     * requests of the same session, and we verify several things - 1. The write
     * is not processed until commit arrives. 2. Once the write is processed,
     * all the read requests are processed as well. 3. All read requests are
     * executed after the write, before any other write, along with new reads.
     */
@Test
public void processAllFollowingUncommittedAfterFirstCommitTest() throws Exception {
    final String path = "/testUncommittedFollowingCommited";
    HashSet<Request> shouldBeInPending = new HashSet<Request>();
    HashSet<Request> shouldBeProcessedAfterPending = new HashSet<Request>();
    Request writeReq = newRequest(new CreateRequest(path, new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT_SEQUENTIAL.toFlag()), OpCode.create, 0x1, 1);
    processor.queuedRequests.add(writeReq);
    shouldBeInPending.add(writeReq);
    for (int readReqId = 2; readReqId <= 5; ++readReqId) {
        Request readReq = newRequest(new GetDataRequest(path, false), OpCode.getData, 0x1, readReqId);
        processor.queuedRequests.add(readReq);
        shouldBeInPending.add(readReq);
        shouldBeProcessedAfterPending.add(readReq);
    }
    processor.initThreads(defaultSizeOfThreadPool);
    processor.stoppedMainLoop = true;
    processor.run();
    Assert.assertTrue("Processed without waiting for commit", processedRequests.isEmpty());
    Assert.assertTrue("Did not handled all of queuedRequests' requests", processor.queuedRequests.isEmpty());
    shouldBeInPending.removeAll(processor.pendingRequests.get(writeReq.sessionId));
    for (Request r : shouldBeInPending) {
        LOG.error("Should be in pending " + r);
    }
    Assert.assertTrue("Not all requests moved to pending from queuedRequests", shouldBeInPending.isEmpty());
    processor.committedRequests.add(writeReq);
    processor.stoppedMainLoop = true;
    processor.run();
    processor.initThreads(defaultSizeOfThreadPool);
    Thread.sleep(500);
    Assert.assertTrue("Did not process committed request", processedRequests.peek() == writeReq);
    Assert.assertTrue("Did not process following read request", processedRequests.containsAll(shouldBeProcessedAfterPending));
    Assert.assertTrue("Did not process committed request", processor.committedRequests.isEmpty());
    Assert.assertTrue("Did not process committed request", processor.pendingRequests.isEmpty());
}
Also used : CreateRequest(org.apache.zookeeper.proto.CreateRequest) GetDataRequest(org.apache.zookeeper.proto.GetDataRequest) CreateRequest(org.apache.zookeeper.proto.CreateRequest) SetDataRequest(org.apache.zookeeper.proto.SetDataRequest) Request(org.apache.zookeeper.server.Request) GetDataRequest(org.apache.zookeeper.proto.GetDataRequest) HashSet(java.util.HashSet) Test(org.junit.Test)

Example 9 with GetDataRequest

use of org.apache.zookeeper.proto.GetDataRequest in project zookeeper by apache.

the class ZooKeeper method getConfig.

/**
     * The asynchronous version of getConfig.
     *
     * @see #getConfig(Watcher, Stat)
     */
public void getConfig(Watcher watcher, DataCallback cb, Object ctx) {
    final String configZnode = ZooDefs.CONFIG_NODE;
    // the watch contains the un-chroot path
    WatchRegistration wcb = null;
    if (watcher != null) {
        wcb = new DataWatchRegistration(watcher, configZnode);
    }
    RequestHeader h = new RequestHeader();
    h.setType(ZooDefs.OpCode.getData);
    GetDataRequest request = new GetDataRequest();
    request.setPath(configZnode);
    request.setWatch(watcher != null);
    GetDataResponse response = new GetDataResponse();
    cnxn.queuePacket(h, new ReplyHeader(), request, response, cb, configZnode, configZnode, ctx, wcb);
}
Also used : ReplyHeader(org.apache.zookeeper.proto.ReplyHeader) RequestHeader(org.apache.zookeeper.proto.RequestHeader) GetDataResponse(org.apache.zookeeper.proto.GetDataResponse) GetDataRequest(org.apache.zookeeper.proto.GetDataRequest)

Aggregations

GetDataRequest (org.apache.zookeeper.proto.GetDataRequest)9 GetDataResponse (org.apache.zookeeper.proto.GetDataResponse)5 ReplyHeader (org.apache.zookeeper.proto.ReplyHeader)5 CreateRequest (org.apache.zookeeper.proto.CreateRequest)4 RequestHeader (org.apache.zookeeper.proto.RequestHeader)4 SetDataRequest (org.apache.zookeeper.proto.SetDataRequest)4 Request (org.apache.zookeeper.server.Request)4 Test (org.junit.Test)4 HashSet (java.util.HashSet)3 IOException (java.io.IOException)1 ByteBuffer (java.nio.ByteBuffer)1 LinkedList (java.util.LinkedList)1 List (java.util.List)1 Record (org.apache.jute.Record)1 KeeperException (org.apache.zookeeper.KeeperException)1 Code (org.apache.zookeeper.KeeperException.Code)1 SessionMovedException (org.apache.zookeeper.KeeperException.SessionMovedException)1 MultiResponse (org.apache.zookeeper.MultiResponse)1 OpResult (org.apache.zookeeper.OpResult)1 CheckResult (org.apache.zookeeper.OpResult.CheckResult)1