VC queue message chunking

application/src/main/java/org/thingsboard/server/service/sync/ie/importing/impl/BaseEntityImportService.java

@@ -160,6 +160,7 @@ public abstract class BaseEntityImportService<I extends EntityId, E extends Expo
 
     protected void cleanupForComparison(E e) {
         e.setTenantId(null);
+        e.setExternalId(null);
         e.setCreatedTime(0);
     }
 

application/src/main/java/org/thingsboard/server/service/sync/vc/DefaultEntitiesVersionControlService.java

@@ -362,6 +362,7 @@ public class DefaultEntitiesVersionControlService implements EntitiesVersionCont
                 .build();
     }
 
+    @SneakyThrows
     @SuppressWarnings({"rawtypes", "unchecked"})
     private void importEntities(EntitiesImportCtx ctx, EntityType entityType) {
         int limit = 100;
@@ -373,9 +374,9 @@ public class DefaultEntitiesVersionControlService implements EntitiesVersionCont
             } catch (InterruptedException | ExecutionException e) {
                 throw new RuntimeException(e);
             }
+            log.debug("[{}] Loading {} entities pack ({})", ctx.getTenantId(), entityType, entityDataList.size());
             for (EntityExportData entityData : entityDataList) {
                 EntityExportData reimportBackup = JacksonUtil.clone(entityData);
-                log.debug("[{}] Loading {} entities", ctx.getTenantId(), entityType);
                 EntityImportResult<?> importResult;
                 try {
                     importResult = exportImportService.importEntity(ctx, entityData);
@@ -391,6 +392,7 @@ public class DefaultEntitiesVersionControlService implements EntitiesVersionCont
                 ctx.getImportedEntities().computeIfAbsent(entityType, t -> new HashSet<>())
                         .add(importResult.getSavedEntity().getId());
             }
+            log.debug("Imported {} pack for tenant {}", entityType, ctx.getTenantId());
             offset += limit;
         } while (entityDataList.size() == limit);
     }
@@ -456,18 +458,20 @@ public class DefaultEntitiesVersionControlService implements EntitiesVersionCont
         EntityId externalId = ((ExportableEntity<EntityId>) entity).getExternalId();
         if (externalId == null) externalId = entityId;
 
-        return transformAsync(gitServiceQueue.getEntity(user.getTenantId(), versionId, externalId),
+        return transform(gitServiceQueue.getEntity(user.getTenantId(), versionId, externalId),
                 otherVersion -> {
                     SimpleEntitiesExportCtx ctx = new SimpleEntitiesExportCtx(user, null, null, EntityExportSettings.builder()
                             .exportRelations(otherVersion.hasRelations())
                             .exportAttributes(otherVersion.hasAttributes())
                             .exportCredentials(otherVersion.hasCredentials())
                             .build());
-                    EntityExportData<?> currentVersion = exportImportService.exportEntity(ctx, entityId);
-                    return transform(gitServiceQueue.getContentsDiff(user.getTenantId(),
-                            JacksonUtil.toPrettyString(currentVersion.sort()),
-                            JacksonUtil.toPrettyString(otherVersion.sort())),
-                            rawDiff -> new EntityDataDiff(currentVersion, otherVersion, rawDiff), MoreExecutors.directExecutor());
+                    EntityExportData<?> currentVersion;
+                    try {
+                        currentVersion = exportImportService.exportEntity(ctx, entityId);
+                    } catch (ThingsboardException e) {
+                        throw new RuntimeException(e);
+                    }
+                    return new EntityDataDiff(currentVersion.sort(), otherVersion.sort());
                 }, MoreExecutors.directExecutor());
     }
 

application/src/main/java/org/thingsboard/server/service/sync/vc/DefaultGitVersionControlQueueService.java

@@ -15,7 +15,10 @@
  */
 package org.thingsboard.server.service.sync.vc;
 
+import com.google.common.collect.Iterables;
+import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.MoreExecutors;
 import com.google.common.util.concurrent.SettableFuture;
 import com.google.protobuf.ByteString;
 import lombok.SneakyThrows;
@@ -23,6 +26,7 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Lazy;
 import org.springframework.stereotype.Service;
+import org.thingsboard.common.util.CollectionsUtil;
 import org.thingsboard.common.util.JacksonUtil;
 import org.thingsboard.server.cluster.TbClusterService;
 import org.thingsboard.server.common.data.EntityType;
@@ -70,12 +74,15 @@ import org.thingsboard.server.service.sync.vc.data.VersionsDiffGitRequest;
 import org.thingsboard.server.service.sync.vc.data.VoidGitRequest;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
+import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.stream.Collectors;
@@ -92,9 +99,12 @@ public class DefaultGitVersionControlQueueService implements GitVersionControlQu
     private final SchedulerComponent scheduler;
 
     private final Map<UUID, PendingGitRequest<?>> pendingRequestMap = new HashMap<>();
+    private final Map<UUID, Map<String, String[]>> chunkedMsgs = new ConcurrentHashMap<>();
 
     @Value("${queue.vc.request-timeout:60000}")
     private int requestTimeout;
+    @Value("${queue.vc.msg-chunk-size:500000}")
+    private int msgChunkSize;
 
     public DefaultGitVersionControlQueueService(TbServiceInfoProvider serviceInfoProvider, TbClusterService clusterService,
                                                 DataDecodingEncodingService encodingService,
@@ -114,24 +124,39 @@ public class DefaultGitVersionControlQueueService implements GitVersionControlQu
         CommitGitRequest commit = new CommitGitRequest(user.getTenantId(), request);
         registerAndSend(commit, builder -> builder.setCommitRequest(
                 buildCommitRequest(commit).setPrepareMsg(getCommitPrepareMsg(user, request)).build()
-        ).build(), wrap(future, commit));
+        ).build(), wrap(future, commit, commit.getRequestId()));
         return future;
     }
 
+    @SuppressWarnings("UnstableApiUsage")
     @Override
     public ListenableFuture<Void> addToCommit(CommitGitRequest commit, EntityExportData<ExportableEntity<EntityId>> entityData) {
-        SettableFuture<Void> future = SettableFuture.create();
-
         String path = getRelativePath(entityData.getEntityType(), entityData.getExternalId());
         String entityDataJson = JacksonUtil.toPrettyString(entityData.sort());
 
-        registerAndSend(commit, builder -> builder.setCommitRequest(
-                buildCommitRequest(commit).setAddMsg(
-                        TransportProtos.AddMsg.newBuilder()
-                                .setRelativePath(path).setEntityDataJson(entityDataJson).build()
-                ).build()
-        ).build(), wrap(future, null));
-        return future;
+        Iterable<String> entityDataChunks = StringUtils.split(entityDataJson, msgChunkSize);
+        String chunkedMsgId = UUID.randomUUID().toString();
+        int chunksCount = Iterables.size(entityDataChunks);
+
+        AtomicInteger chunkIndex = new AtomicInteger();
+        List<ListenableFuture<Void>> futures = new ArrayList<>();
+        entityDataChunks.forEach(chunk -> {
+            SettableFuture<Void> chunkFuture = SettableFuture.create();
+            log.trace("[{}] sending chunk {} for 'addToCommit'", chunkedMsgId, chunkIndex.get());
+            registerAndSend(commit, builder -> builder.setCommitRequest(
+                    buildCommitRequest(commit).setAddMsg(
+                            TransportProtos.AddMsg.newBuilder()
+                                    .setRelativePath(path).setEntityDataJsonChunk(chunk)
+                                    .setChunkedMsgId(chunkedMsgId).setChunkIndex(chunkIndex.getAndIncrement())
+                                    .setChunksCount(chunksCount).build()
+                    ).build()
+            ).build(), wrap(chunkFuture, null, commit.getRequestId()));
+            futures.add(chunkFuture);
+        });
+        return Futures.transform(Futures.allAsList(futures), r -> {
+            log.trace("[{}] sent all chunks for 'addToCommit'", chunkedMsgId);
+            return null;
+        }, MoreExecutors.directExecutor());
     }
 
     @Override
@@ -144,7 +169,7 @@ public class DefaultGitVersionControlQueueService implements GitVersionControlQu
                 buildCommitRequest(commit).setDeleteMsg(
                         TransportProtos.DeleteMsg.newBuilder().setRelativePath(path).build()
                 ).build()
-        ).build(), wrap(future, null));
+        ).build(), wrap(future, null, commit.getRequestId()));
 
         return future;
     }
@@ -220,7 +245,6 @@ public class DefaultGitVersionControlQueueService implements GitVersionControlQu
     @Override
     public ListenableFuture<List<VersionedEntityInfo>> listEntitiesAtVersion(TenantId tenantId, String branch, String versionId, EntityType entityType) {
         return listEntitiesAtVersion(tenantId, ListEntitiesRequestMsg.newBuilder()
-                .setBranchName(branch)
                 .setVersionId(versionId)
                 .setEntityType(entityType.name())
                 .build());
@@ -229,7 +253,6 @@ public class DefaultGitVersionControlQueueService implements GitVersionControlQu
     @Override
     public ListenableFuture<List<VersionedEntityInfo>> listEntitiesAtVersion(TenantId tenantId, String branch, String versionId) {
         return listEntitiesAtVersion(tenantId, ListEntitiesRequestMsg.newBuilder()
-                .setBranchName(branch)
                 .setVersionId(versionId)
                 .build());
     }
@@ -289,9 +312,11 @@ public class DefaultGitVersionControlQueueService implements GitVersionControlQu
             var requestBody = enrichFunction.apply(newRequestProto(request, settings));
             log.trace("[{}][{}] PUSHING request: {}", request.getTenantId(), request.getRequestId(), requestBody);
             clusterService.pushMsgToVersionControl(request.getTenantId(), requestBody, callback);
-            request.setTimeoutTask(scheduler.schedule(() -> {
-                processTimeout(request.getRequestId());
-            }, requestTimeout, TimeUnit.MILLISECONDS));
+            if (request.getTimeoutTask() == null) {
+                request.setTimeoutTask(scheduler.schedule(() -> {
+                    processTimeout(request.getRequestId());
+                }, requestTimeout, TimeUnit.MILLISECONDS));
+            }
         } else {
             throw new RuntimeException("Future is already done!");
         }
@@ -355,15 +380,15 @@ public class DefaultGitVersionControlQueueService implements GitVersionControlQu
     @Override
     public void processResponse(VersionControlResponseMsg vcResponseMsg) {
         UUID requestId = new UUID(vcResponseMsg.getRequestIdMSB(), vcResponseMsg.getRequestIdLSB());
-        PendingGitRequest<?> request = pendingRequestMap.remove(requestId);
+        PendingGitRequest<?> request = pendingRequestMap.get(requestId);
         if (request == null) {
             log.debug("[{}] received stale response: {}", requestId, vcResponseMsg);
             return;
         } else {
             log.debug("[{}] processing response: {}", requestId, vcResponseMsg);
-            request.getTimeoutTask().cancel(true);
         }
         var future = request.getFuture();
+        boolean completed = true;
         if (!StringUtils.isEmpty(vcResponseMsg.getError())) {
             future.setException(new RuntimeException(vcResponseMsg.getError()));
         } else {
@@ -391,12 +416,39 @@ public class DefaultGitVersionControlQueueService implements GitVersionControlQu
                 var listVersionsResponse = vcResponseMsg.getListVersionsResponse();
                 ((ListVersionsGitRequest) request).getFuture().set(toPageData(listVersionsResponse));
             } else if (vcResponseMsg.hasEntityContentResponse()) {
-                var data = vcResponseMsg.getEntityContentResponse().getData();
-                ((EntityContentGitRequest) request).getFuture().set(toData(data));
+                TransportProtos.EntityContentResponseMsg responseMsg = vcResponseMsg.getEntityContentResponse();
+                String[] msgChunks = chunkedMsgs.computeIfAbsent(requestId, id -> new HashMap<>())
+                        .computeIfAbsent(responseMsg.getChunkedMsgId(), id -> new String[responseMsg.getChunksCount()]);
+                msgChunks[responseMsg.getChunkIndex()] = responseMsg.getData();
+                log.trace("[{}] received chunk {} for 'getEntity'", responseMsg.getChunkedMsgId(), responseMsg.getChunkIndex());
+                if (CollectionsUtil.countNonNull(msgChunks) == responseMsg.getChunksCount()) {
+                    log.trace("[{}] collected all chunks for 'getEntity'", responseMsg.getChunkedMsgId());
+                    String data = String.join("", msgChunks);
+                    ((EntityContentGitRequest) request).getFuture().set(toData(data));
+                } else {
+                    completed = false;
+                }
             } else if (vcResponseMsg.hasEntitiesContentResponse()) {
-                var dataList = vcResponseMsg.getEntitiesContentResponse().getDataList();
-                ((EntitiesContentGitRequest) request).getFuture()
-                        .set(dataList.stream().map(this::toData).collect(Collectors.toList()));
+                TransportProtos.EntitiesContentResponseMsg responseMsg = vcResponseMsg.getEntitiesContentResponse();
+                TransportProtos.EntityContentResponseMsg item = responseMsg.getItem();
+                if (responseMsg.getItemsCount() > 0) {
+                    Map<String, String[]> chunkedItems = chunkedMsgs.computeIfAbsent(requestId, id -> new HashMap<>());
+                    String[] itemChunks = chunkedItems.computeIfAbsent(item.getChunkedMsgId(), id -> {
+                        return new String[item.getChunksCount()];
+                    });
+                    itemChunks[item.getChunkIndex()] = item.getData();
+                    if (chunkedItems.size() == responseMsg.getItemsCount() && chunkedItems.values().stream()
+                            .allMatch(chunks -> CollectionsUtil.countNonNull(chunks) == chunks.length)) {
+                        ((EntitiesContentGitRequest) request).getFuture().set(chunkedItems.values().stream()
+                                .map(chunks -> String.join("", chunks))
+                                .map(this::toData)
+                                .collect(Collectors.toList()));
+                    } else {
+                        completed = false;
+                    }
+                } else {
+                    ((EntitiesContentGitRequest) request).getFuture().set(Collections.emptyList());
+                }
             } else if (vcResponseMsg.hasVersionsDiffResponse()) {
                 TransportProtos.VersionsDiffResponseMsg diffResponse = vcResponseMsg.getVersionsDiffResponse();
                 List<EntityVersionsDiff> entityVersionsDiffList = diffResponse.getDiffList().stream()
@@ -416,16 +468,29 @@ public class DefaultGitVersionControlQueueService implements GitVersionControlQu
                 ((ContentsDiffGitRequest) request).getFuture().set(diff);
             }
         }
+        if (completed) {
+            removePendingRequest(requestId);
+        }
     }
 
     private void processTimeout(UUID requestId) {
-        PendingGitRequest<?> pendingRequest = pendingRequestMap.remove(requestId);
+        PendingGitRequest<?> pendingRequest = removePendingRequest(requestId);
         if (pendingRequest != null) {
             log.debug("[{}] request timed out ({} ms}", requestId, requestTimeout);
             pendingRequest.getFuture().setException(new TimeoutException("Request timed out"));
         }
     }
 
+    private PendingGitRequest<?> removePendingRequest(UUID requestId) {
+        PendingGitRequest<?> pendingRequest = pendingRequestMap.remove(requestId);
+        if (pendingRequest != null && pendingRequest.getTimeoutTask() != null) {
+            pendingRequest.getTimeoutTask().cancel(true);
+            pendingRequest.setTimeoutTask(null);
+        }
+        chunkedMsgs.remove(requestId);
+        return pendingRequest;
+    }
+
     private PageData<EntityVersion> toPageData(TransportProtos.ListVersionsResponseMsg listVersionsResponse) {
         var listVersions = listVersionsResponse.getVersionsList().stream().map(this::getEntityVersion).collect(Collectors.toList());
         return new PageData<>(listVersions, listVersionsResponse.getTotalPages(), listVersionsResponse.getTotalElements(), listVersionsResponse.getHasNext());
@@ -458,16 +523,18 @@ public class DefaultGitVersionControlQueueService implements GitVersionControlQu
         };
     }
 
-    private static <T> TbQueueCallback wrap(SettableFuture<T> future, T value) {
+    private <T> TbQueueCallback wrap(SettableFuture<T> future, T value, UUID requestId) {
         return new TbQueueCallback() {
             @Override
             public void onSuccess(TbQueueMsgMetadata metadata) {
                 future.set(value);
+                removePendingRequest(requestId);
             }
 
             @Override
             public void onFailure(Throwable t) {
                 future.setException(t);
+                removePendingRequest(requestId);
             }
         };
     }

application/src/main/resources/thingsboard.yml

@@ -1024,6 +1024,7 @@ queue:
     poll-interval: "${TB_QUEUE_VC_INTERVAL_MS:25}"
     pack-processing-timeout: "${TB_QUEUE_VC_PACK_PROCESSING_TIMEOUT_MS:60000}"
     request-timeout: "${TB_QUEUE_VC_REQUEST_TIMEOUT:60000}"
+    msg-chunk-size: "${TB_QUEUE_VC_MSG_CHUNK_SIZE:500000}"
   js:
     # JS Eval request topic
     request_topic: "${REMOTE_JS_EVAL_REQUEST_TOPIC:js_eval.requests}"

common/cluster-api/src/main/proto/queue.proto

@@ -707,7 +707,10 @@ message PrepareMsg {
 
 message AddMsg {
   string relativePath = 1;
-  string entityDataJson = 2;
+  string entityDataJsonChunk = 2;
+  string chunkedMsgId = 3;
+  int32 chunkIndex = 4;
+  int32 chunksCount = 5;
 }
 
 message DeleteMsg {
@@ -747,9 +750,8 @@ message ListVersionsResponseMsg {
 }
 
 message ListEntitiesRequestMsg {
-  string branchName = 1;
-  string versionId = 2;
-  string entityType = 3;
+  string versionId = 1;
+  string entityType = 2;
 }
 
 message VersionedEntityInfoProto {
@@ -778,6 +780,9 @@ message EntityContentRequestMsg {
 
 message EntityContentResponseMsg {
   string data = 1;
+  string chunkedMsgId = 2;
+  int32 chunkIndex = 3;
+  int32 chunksCount = 4;
 }
 
 message EntitiesContentRequestMsg {
@@ -788,7 +793,8 @@ message EntitiesContentRequestMsg {
 }
 
 message EntitiesContentResponseMsg {
-  repeated string data = 1;
+  EntityContentResponseMsg item = 1;
+  int32 itemsCount = 2;
 }
 
 message VersionsDiffRequestMsg {

common/data/src/main/java/org/thingsboard/server/common/data/StringUtils.java

@@ -15,6 +15,8 @@
  */
 package org.thingsboard.server.common.data;
 
+import com.google.common.base.Splitter;
+
 import static org.apache.commons.lang3.StringUtils.repeat;
 
 public class StringUtils {
@@ -92,4 +94,8 @@ public class StringUtils {
         return input.substring(0, startIndexInclusive) + obfuscatedPart + input.substring(endIndexExclusive);
     }
 
+    public static Iterable<String> split(String value, int maxPartSize) {
+        return Splitter.fixedLength(maxPartSize).split(value);
+    }
+
 }

common/data/src/main/java/org/thingsboard/server/common/data/sync/vc/EntityDataDiff.java

@@ -24,5 +24,4 @@ import org.thingsboard.server.common.data.sync.ie.EntityExportData;
 public class EntityDataDiff {
     private EntityExportData<?> currentVersion;
     private EntityExportData<?> otherVersion;
-    private String rawDiff;
 }

common/data/src/main/java/org/thingsboard/server/common/data/sync/vc/VersionedEntityInfo.java

@@ -23,7 +23,6 @@ import org.thingsboard.server.common.data.id.EntityId;
 @NoArgsConstructor
 public class VersionedEntityInfo {
     private EntityId externalId;
-    // etc..
 
     public VersionedEntityInfo(EntityId externalId) {
         this.externalId = externalId;

common/util/src/main/java/org/thingsboard/common/util/CollectionsUtil.java

@@ -39,4 +39,12 @@ public class CollectionsUtil {
         return isNotEmpty(collection) && collection.contains(element);
     }
 
+    public static <T> int countNonNull(T[] array) {
+        int count = 0;
+        for (T t : array) {
+            if (t != null) count++;
+        }
+        return count;
+    }
+
 }

common/version-control/src/main/java/org/thingsboard/server/service/sync/vc/DefaultClusterVersionControlService.java

@@ -15,6 +15,7 @@
  */
 package org.thingsboard.server.service.sync.vc;
 
+import com.google.common.collect.Iterables;
 import com.google.common.util.concurrent.FutureCallback;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
@@ -28,6 +29,7 @@ import org.springframework.boot.context.event.ApplicationReadyEvent;
 import org.springframework.context.event.EventListener;
 import org.springframework.core.annotation.Order;
 import org.springframework.stereotype.Service;
+import org.thingsboard.common.util.CollectionsUtil;
 import org.thingsboard.common.util.ThingsBoardThreadFactory;
 import org.thingsboard.server.common.data.EntityType;
 import org.thingsboard.server.common.data.StringUtils;
@@ -88,6 +90,7 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
+import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.function.Function;
@@ -122,6 +125,8 @@ public class DefaultClusterVersionControlService extends TbApplicationEventListe
     private long packProcessingTimeout;
     @Value("${vc.git.io_pool_size:3}")
     private int ioPoolSize;
+    @Value("${queue.vc.msg-chunk-size:500000}")
+    private int msgChunkSize;
 
     //We need to manually manage the threads since tasks for particular tenant need to be processed sequentially.
     private final List<ListeningExecutorService> ioThreads = new ArrayList<>();
@@ -269,19 +274,49 @@ public class DefaultClusterVersionControlService extends TbApplicationEventListe
         String path = getRelativePath(entityType, null);
         var ids = vcService.listEntitiesAtVersion(ctx.getTenantId(), request.getVersionId(), path)
                 .stream().skip(request.getOffset()).limit(request.getLimit()).collect(Collectors.toList());
-        var response = EntitiesContentResponseMsg.newBuilder();
-        for (VersionedEntityInfo info : ids) {
-            var data = vcService.getFileContentAtCommit(ctx.getTenantId(),
-                    getRelativePath(info.getExternalId().getEntityType(), info.getExternalId().getId().toString()), request.getVersionId());
-            response.addData(data);
+        if (!ids.isEmpty()) {
+            for (VersionedEntityInfo info : ids) {
+                var data = vcService.getFileContentAtCommit(ctx.getTenantId(),
+                        getRelativePath(info.getExternalId().getEntityType(), info.getExternalId().getId().toString()), request.getVersionId());
+
+                Iterable<String> dataChunks = StringUtils.split(data, msgChunkSize);
+                String chunkedMsgId = UUID.randomUUID().toString();
+                int chunksCount = Iterables.size(dataChunks);
+                AtomicInteger chunkIndex = new AtomicInteger();
+                dataChunks.forEach(chunk -> {
+                    EntitiesContentResponseMsg.Builder response = EntitiesContentResponseMsg.newBuilder()
+                            .setItemsCount(ids.size())
+                            .setItem(EntityContentResponseMsg.newBuilder()
+                                    .setData(chunk)
+                                    .setChunkedMsgId(chunkedMsgId)
+                                    .setChunksCount(chunksCount)
+                                    .setChunkIndex(chunkIndex.getAndIncrement())
+                                    .build());
+                    reply(ctx, Optional.empty(), builder -> builder.setEntitiesContentResponse(response));
+                });
+            }
+        } else {
+            reply(ctx, Optional.empty(), builder -> builder.setEntitiesContentResponse(
+                    EntitiesContentResponseMsg.newBuilder()
+                            .setItemsCount(0)));
         }
-        reply(ctx, Optional.empty(), builder -> builder.setEntitiesContentResponse(response));
     }
 
     private void handleEntityContentRequest(VersionControlRequestCtx ctx, EntityContentRequestMsg request) throws IOException {
         String path = getRelativePath(EntityType.valueOf(request.getEntityType()), new UUID(request.getEntityIdMSB(), request.getEntityIdLSB()).toString());
         String data = vcService.getFileContentAtCommit(ctx.getTenantId(), path, request.getVersionId());
-        reply(ctx, Optional.empty(), builder -> builder.setEntityContentResponse(EntityContentResponseMsg.newBuilder().setData(data)));
+
+        Iterable<String> dataChunks = StringUtils.split(data, msgChunkSize);
+        String chunkedMsgId = UUID.randomUUID().toString();
+        int chunksCount = Iterables.size(dataChunks);
+
+        AtomicInteger chunkIndex = new AtomicInteger();
+        dataChunks.forEach(chunk -> {
+            log.trace("[{}] sending chunk {} for 'getEntity'", chunkedMsgId, chunkIndex.get());
+            reply(ctx, Optional.empty(), builder -> builder.setEntityContentResponse(EntityContentResponseMsg.newBuilder()
+                    .setData(chunk).setChunkedMsgId(chunkedMsgId).setChunksCount(chunksCount)
+                    .setChunkIndex(chunkIndex.getAndIncrement())));
+        });
     }
 
     private void handleListVersions(VersionControlRequestCtx ctx, ListVersionsRequestMsg request) throws Exception {
@@ -412,7 +447,16 @@ public class DefaultClusterVersionControlService extends TbApplicationEventListe
     }
 
     private void addToCommit(VersionControlRequestCtx ctx, PendingCommit commit, AddMsg addMsg) throws IOException {
-        vcService.add(commit, addMsg.getRelativePath(), addMsg.getEntityDataJson());
+        log.trace("[{}] received chunk {} for 'addToCommit'", addMsg.getChunkedMsgId(), addMsg.getChunkIndex());
+        Map<String, String[]> chunkedMsgs = commit.getChunkedMsgs();
+        String[] msgChunks = chunkedMsgs.computeIfAbsent(addMsg.getChunkedMsgId(), id -> new String[addMsg.getChunksCount()]);
+        msgChunks[addMsg.getChunkIndex()] = addMsg.getEntityDataJsonChunk();
+        if (CollectionsUtil.countNonNull(msgChunks) == msgChunks.length) {
+            log.trace("[{}] collected all chunks for 'addToCommit'", addMsg.getChunkedMsgId());
+            String entityDataJson = String.join("", msgChunks);
+            chunkedMsgs.remove(addMsg.getChunkedMsgId());
+            vcService.add(commit, addMsg.getRelativePath(), entityDataJson);
+        }
     }
 
     private void doAbortCurrentCommit(TenantId tenantId, PendingCommit current) {

common/version-control/src/main/java/org/thingsboard/server/service/sync/vc/PendingCommit.java

@@ -18,7 +18,9 @@ package org.thingsboard.server.service.sync.vc;
 import lombok.Data;
 import org.thingsboard.server.common.data.id.TenantId;
 
+import java.util.Map;
 import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
 
 @Data
 public class PendingCommit {
@@ -31,9 +33,10 @@ public class PendingCommit {
     private String versionName;
 
     private String authorName;
-
     private String authorEmail;
 
+    private Map<String, String[]> chunkedMsgs;
+
     public PendingCommit(TenantId tenantId, String nodeId, UUID txId, String branch, String versionName, String authorName, String authorEmail) {
         this.tenantId = tenantId;
         this.nodeId = nodeId;
@@ -44,4 +47,12 @@ public class PendingCommit {
         this.authorEmail = authorEmail;
         this.workingBranch = txId.toString();
     }
+
+    public Map<String, String[]> getChunkedMsgs() {
+        if (chunkedMsgs == null) {
+            chunkedMsgs = new ConcurrentHashMap<>();
+        }
+        return chunkedMsgs;
+    }
+
 }

msa/vc-executor/src/main/resources/tb-vc-executor.yml

@@ -168,6 +168,7 @@ queue:
     partitions: "${TB_QUEUE_VC_PARTITIONS:10}"
     poll-interval: "${TB_QUEUE_VC_INTERVAL_MS:25}"
     pack-processing-timeout: "${TB_QUEUE_VC_PACK_PROCESSING_TIMEOUT_MS:60000}"
+    msg-chunk-size: "${TB_QUEUE_VC_MSG_CHUNK_SIZE:500000}"
 
 vc:
   # Pool size for handling export tasks

ui-ngx/src/app/shared/models/vc.models.ts

@@ -228,7 +228,6 @@ export interface RuleChainExportData extends EntityExportData<RuleChain> {
 export interface EntityDataDiff {
   currentVersion: EntityExportData<any>;
   otherVersion: EntityExportData<any>;
-  rawDiff: string;
 }
 
 export function entityExportDataToJsonString(data: EntityExportData<any>): string {