diff --git a/api/apps/document_app.py b/api/apps/document_app.py
index fdab39ad442..4b1c3e69995 100644
--- a/api/apps/document_app.py
+++ b/api/apps/document_app.py
@@ -21,19 +21,25 @@
 from flask import request
 from flask_login import login_required, current_user
 
-from api.db.db_models import Task, File
+from deepdoc.parser.html_parser import RAGFlowHtmlParser
+from rag.nlp import search
+
+from api.db import FileType, TaskStatus, ParserType, FileSource
+from api.db.db_models import File, Task
 from api.db.services.file2document_service import File2DocumentService
 from api.db.services.file_service import FileService
-from api.db.services.task_service import TaskService, queue_tasks
+from api.db.services.task_service import queue_tasks
 from api.db.services.user_service import UserTenantService
-from deepdoc.parser.html_parser import RAGFlowHtmlParser
-from rag.nlp import search
 from api.db.services import duplicate_name
 from api.db.services.knowledgebase_service import KnowledgebaseService
-from api.utils.api_utils import server_error_response, get_data_error_result, validate_request
-from api.utils import get_uuid
-from api.db import FileType, TaskStatus, ParserType, FileSource
+from api.db.services.task_service import TaskService
 from api.db.services.document_service import DocumentService, doc_upload_and_parse
+from api.utils.api_utils import (
+    server_error_response,
+    get_data_error_result,
+    validate_request,
+)
+from api.utils import get_uuid
 from api import settings
 from api.utils.api_utils import get_json_result
 from rag.utils.storage_factory import STORAGE_IMPL
@@ -316,6 +322,7 @@ def rm():
 
             b, n = File2DocumentService.get_storage_address(doc_id=doc_id)
 
+            TaskService.filter_delete([Task.doc_id == doc_id])
             if not DocumentService.remove_document(doc, tenant_id):
                 return get_data_error_result(
                     message="Database error (Document removal)!")
@@ -361,11 +368,12 @@ def run():
             e, doc = DocumentService.get_by_id(id)
             if not e:
                 return get_data_error_result(message="Document not found!")
-            if settings.docStoreConn.indexExist(search.index_name(tenant_id), doc.kb_id):
-                settings.docStoreConn.delete({"doc_id": id}, search.index_name(tenant_id), doc.kb_id)
+            if req.get("delete", False):
+                TaskService.filter_delete([Task.doc_id == id])
+                if settings.docStoreConn.indexExist(search.index_name(tenant_id), doc.kb_id):
+                    settings.docStoreConn.delete({"doc_id": id}, search.index_name(tenant_id), doc.kb_id)
 
             if str(req["run"]) == TaskStatus.RUNNING.value:
-                TaskService.filter_delete([Task.doc_id == id])
                 e, doc = DocumentService.get_by_id(id)
                 doc = doc.to_dict()
                 doc["tenant_id"] = tenant_id
diff --git a/api/db/db_models.py b/api/db/db_models.py
index 0c4d12c034c..24ad7f010a7 100644
--- a/api/db/db_models.py
+++ b/api/db/db_models.py
@@ -855,6 +855,8 @@ class Task(DataBaseModel):
         help_text="process message",
         default="")
     retry_count = IntegerField(default=0)
+    digest = TextField(null=True, help_text="task digest", default="")
+    chunk_ids = LongTextField(null=True, help_text="chunk ids", default="")
 
 
 class Dialog(DataBaseModel):
@@ -1090,4 +1092,16 @@ def migrate_db():
             )
         except Exception:
             pass
+        try:
+            migrate(
+                migrator.add_column("task", "digest", TextField(null=True, help_text="task digest", default=""))
+            )
+        except Exception:
+            pass
 
+        try:
+            migrate(
+                migrator.add_column("task", "chunk_ids", LongTextField(null=True, help_text="chunk ids", default=""))
+            )
+        except Exception:
+            pass
diff --git a/api/db/services/document_service.py b/api/db/services/document_service.py
index f4b6f6874b8..cff5db583d6 100644
--- a/api/db/services/document_service.py
+++ b/api/db/services/document_service.py
@@ -282,6 +282,31 @@ def get_embd_id(cls, doc_id):
             return
         return docs[0]["embd_id"]
 
+    @classmethod
+    @DB.connection_context()
+    def get_chunking_config(cls, doc_id):
+        configs = (
+            cls.model.select(
+                cls.model.id,
+                cls.model.kb_id,
+                cls.model.parser_id,
+                cls.model.parser_config,
+                Knowledgebase.language,
+                Knowledgebase.embd_id,
+                Tenant.id.alias("tenant_id"),
+                Tenant.img2txt_id,
+                Tenant.asr_id,
+                Tenant.llm_id,
+            )
+            .join(Knowledgebase, on=(cls.model.kb_id == Knowledgebase.id))
+            .join(Tenant, on=(Knowledgebase.tenant_id == Tenant.id))
+            .where(cls.model.id == doc_id)
+        )
+        configs = configs.dicts()
+        if not configs:
+            return None
+        return configs[0]
+
     @classmethod
     @DB.connection_context()
     def get_doc_id_by_doc_name(cls, doc_name):
diff --git a/api/db/services/task_service.py b/api/db/services/task_service.py
index 424a571ee57..5c53fe241bb 100644
--- a/api/db/services/task_service.py
+++ b/api/db/services/task_service.py
@@ -15,6 +15,8 @@
 #
 import os
 import random
+import xxhash
+import bisect
 
 from api.db.db_utils import bulk_insert_into_db
 from deepdoc.parser import PdfParser
@@ -29,7 +31,21 @@
 from rag.settings import SVR_QUEUE_NAME
 from rag.utils.storage_factory import STORAGE_IMPL
 from rag.utils.redis_conn import REDIS_CONN
+from api import settings
+from rag.nlp import search
 
+def trim_header_by_lines(text: str, max_length) -> str:
+    if len(text) <= max_length:
+        return text
+    lines = text.split("\n")
+    total = 0
+    idx = len(lines) - 1
+    for i in range(len(lines)-1, -1, -1):
+        if total + len(lines[i]) > max_length:
+            break
+        idx = i
+    text2 = "\n".join(lines[idx:])
+    return text2
 
 class TaskService(CommonService):
     model = Task
@@ -87,6 +103,30 @@ def get_task(cls, task_id):
 
         return docs[0]
 
+    @classmethod
+    @DB.connection_context()
+    def get_tasks(cls, doc_id: str):
+        fields = [
+            cls.model.id,
+            cls.model.from_page,
+            cls.model.progress,
+            cls.model.digest,
+            cls.model.chunk_ids,
+        ]
+        tasks = (
+            cls.model.select(*fields).order_by(cls.model.from_page.asc(), cls.model.create_time.desc())
+            .where(cls.model.doc_id == doc_id)
+        )
+        tasks = list(tasks.dicts())
+        if not tasks:
+            return None
+        return tasks
+
+    @classmethod
+    @DB.connection_context()
+    def update_chunk_ids(cls, id: str, chunk_ids: str):
+        cls.model.update(chunk_ids=chunk_ids).where(cls.model.id == id).execute()
+
     @classmethod
     @DB.connection_context()
     def get_ongoing_doc_name(cls):
@@ -133,22 +173,18 @@ def get_ongoing_doc_name(cls):
     @classmethod
     @DB.connection_context()
     def do_cancel(cls, id):
-        try:
-            task = cls.model.get_by_id(id)
-            _, doc = DocumentService.get_by_id(task.doc_id)
-            return doc.run == TaskStatus.CANCEL.value or doc.progress < 0
-        except Exception:
-            pass
-        return False
+        task = cls.model.get_by_id(id)
+        _, doc = DocumentService.get_by_id(task.doc_id)
+        return doc.run == TaskStatus.CANCEL.value or doc.progress < 0
 
     @classmethod
     @DB.connection_context()
     def update_progress(cls, id, info):
         if os.environ.get("MACOS"):
             if info["progress_msg"]:
-                cls.model.update(
-                    progress_msg=cls.model.progress_msg + "\n" + info["progress_msg"]
-                ).where(cls.model.id == id).execute()
+                task = cls.model.get_by_id(id)
+                progress_msg = trim_header_by_lines(task.progress_msg + "\n" + info["progress_msg"], 10000)
+                cls.model.update(progress_msg=progress_msg).where(cls.model.id == id).execute()
             if "progress" in info:
                 cls.model.update(progress=info["progress"]).where(
                     cls.model.id == id
@@ -157,9 +193,9 @@ def update_progress(cls, id, info):
 
         with DB.lock("update_progress", -1):
             if info["progress_msg"]:
-                cls.model.update(
-                    progress_msg=cls.model.progress_msg + "\n" + info["progress_msg"]
-                ).where(cls.model.id == id).execute()
+                task = cls.model.get_by_id(id)
+                progress_msg = trim_header_by_lines(task.progress_msg + "\n" + info["progress_msg"], 10000)
+                cls.model.update(progress_msg=progress_msg).where(cls.model.id == id).execute()
             if "progress" in info:
                 cls.model.update(progress=info["progress"]).where(
                     cls.model.id == id
@@ -168,7 +204,7 @@ def update_progress(cls, id, info):
 
 def queue_tasks(doc: dict, bucket: str, name: str):
     def new_task():
-        return {"id": get_uuid(), "doc_id": doc["id"]}
+        return {"id": get_uuid(), "doc_id": doc["id"], "progress": 0.0}
 
     tsks = []
 
@@ -203,10 +239,46 @@ def new_task():
     else:
         tsks.append(new_task())
 
+    chunking_config = DocumentService.get_chunking_config(doc["id"])
+    for task in tsks:
+        hasher = xxhash.xxh64()
+        for field in sorted(chunking_config.keys()):
+            hasher.update(str(chunking_config[field]).encode("utf-8"))
+        for field in ["doc_id", "from_page", "to_page"]:
+            hasher.update(str(task.get(field, "")).encode("utf-8"))
+        task_digest = hasher.hexdigest()
+        task["digest"] = task_digest
+        task["progress"] = 0.0
+
+    prev_tasks = TaskService.get_tasks(doc["id"])
+    if prev_tasks:
+        for task in tsks:
+            reuse_prev_task_chunks(task, prev_tasks, chunking_config)
+        TaskService.filter_delete([Task.doc_id == doc["id"]])
+        chunk_ids = []
+        for task in prev_tasks:
+            if task["chunk_ids"]:
+                chunk_ids.extend(task["chunk_ids"].split())
+        if chunk_ids:
+            settings.docStoreConn.delete({"id": chunk_ids}, search.index_name(chunking_config["tenant_id"]), chunking_config["kb_id"])
+
     bulk_insert_into_db(Task, tsks, True)
     DocumentService.begin2parse(doc["id"])
 
+    tsks = [task for task in tsks if task["progress"] < 1.0]
     for t in tsks:
         assert REDIS_CONN.queue_product(
             SVR_QUEUE_NAME, message=t
         ), "Can't access Redis. Please check the Redis' status."
+
+def reuse_prev_task_chunks(task: dict, prev_tasks: list[dict], chunking_config: dict):
+    idx = bisect.bisect_left(prev_tasks, task["from_page"], key=lambda x: x["from_page"])
+    if idx >= len(prev_tasks):
+        return
+    prev_task = prev_tasks[idx]
+    if prev_task["progress"] < 1.0 or prev_task["digest"] != task["digest"] or not prev_task["chunk_ids"]:
+        return
+    task["chunk_ids"] = prev_task["chunk_ids"]
+    task["progress"] = 1.0
+    task["progress_msg"] = f"Page({task['from_page']}~{task['to_page']}): reused previous task's chunks"
+    prev_task["chunk_ids"] = ""
diff --git a/poetry.lock b/poetry.lock
index 5dacfd02546..4f0a3068b12 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -145,7 +145,7 @@ name = "aiolimiter"
 version = "1.2.0"
 description = "asyncio rate limiter, a leaky bucket implementation"
 optional = false
-python-versions = "<4.0,>=3.8"
+python-versions = ">=3.8,<4.0"
 files = [
     {file = "aiolimiter-1.2.0-py3-none-any.whl", hash = "sha256:e3fc486a4506248cfdd1f3976920459945944518bbb1d1e6b2be1060232829e2"},
     {file = "aiolimiter-1.2.0.tar.gz", hash = "sha256:761455d26df0d7a393f78bd39b022579e02ca5a65beb303a67bed2ded2f740ac"},
@@ -416,7 +416,7 @@ name = "aspose-slides"
 version = "24.12.0"
 description = "Aspose.Slides for Python via .NET is a presentation file formats processing library for working with Microsoft PowerPoint files without using Microsoft PowerPoint."
 optional = false
-python-versions = "<3.14,>=3.5"
+python-versions = ">=3.5,<3.14"
 files = [
     {file = "Aspose.Slides-24.12.0-py3-none-macosx_10_14_x86_64.whl", hash = "sha256:ccfaa61a863ed28cd37b221e31a0edf4a83802599d76fb50861c25149ac5e5e3"},
     {file = "Aspose.Slides-24.12.0-py3-none-macosx_11_0_arm64.whl", hash = "sha256:b050659129c5ca92e52fbcd7d5091caa244db731adb68fbea1fd0a8b9fd62a5a"},
@@ -568,7 +568,7 @@ name = "bce-python-sdk"
 version = "0.9.23"
 description = "BCE SDK for python"
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,<4,>=2.7"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, <4"
 files = [
     {file = "bce_python_sdk-0.9.23-py3-none-any.whl", hash = "sha256:8debe21a040e00060f6044877d594765ed7b18bc765c6bf16b878bca864140a3"},
     {file = "bce_python_sdk-0.9.23.tar.gz", hash = "sha256:19739fed5cd0725356fc5ffa2acbdd8fb23f2a81edb91db21a03174551d0cf41"},
@@ -1502,7 +1502,7 @@ name = "cryptography"
 version = "44.0.0"
 description = "cryptography is a package which provides cryptographic recipes and primitives to Python developers."
 optional = false
-python-versions = "!=3.9.0,!=3.9.1,>=3.7"
+python-versions = ">=3.7, !=3.9.0, !=3.9.1"
 files = [
     {file = "cryptography-44.0.0-cp37-abi3-macosx_10_9_universal2.whl", hash = "sha256:84111ad4ff3f6253820e6d3e58be2cc2a00adb29335d4cacb5ab4d4d34f2a123"},
     {file = "cryptography-44.0.0-cp37-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:b15492a11f9e1b62ba9d73c210e2416724633167de94607ec6069ef724fad092"},
@@ -1711,7 +1711,7 @@ name = "deprecated"
 version = "1.2.15"
 description = "Python @deprecated decorator to deprecate old python classes, functions or methods."
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 files = [
     {file = "Deprecated-1.2.15-py2.py3-none-any.whl", hash = "sha256:353bc4a8ac4bfc96800ddab349d89c25dec1079f65fd53acdcc1e0b975b21320"},
     {file = "deprecated-1.2.15.tar.gz", hash = "sha256:683e561a90de76239796e6b6feac66b99030d2dd3fcf61ef996330f14bbb9b0d"},
@@ -2042,7 +2042,7 @@ name = "fastembed"
 version = "0.3.6"
 description = "Fast, light, accurate library built for retrieval embedding generation"
 optional = false
-python-versions = "<3.13,>=3.8.0"
+python-versions = ">=3.8.0,<3.13"
 files = [
     {file = "fastembed-0.3.6-py3-none-any.whl", hash = "sha256:2bf70edae28bb4ccd9e01617098c2075b0ba35b88025a3d22b0e1e85b2c488ce"},
     {file = "fastembed-0.3.6.tar.gz", hash = "sha256:c93c8ec99b8c008c2d192d6297866b8d70ec7ac8f5696b34eb5ea91f85efd15f"},
@@ -2624,12 +2624,12 @@ files = [
 google-auth = ">=2.14.1,<3.0.dev0"
 googleapis-common-protos = ">=1.56.2,<2.0.dev0"
 grpcio = [
-    {version = ">=1.49.1,<2.0dev", optional = true, markers = "python_version >= \"3.11\" and extra == \"grpc\""},
     {version = ">=1.33.2,<2.0dev", optional = true, markers = "python_version < \"3.11\" and extra == \"grpc\""},
+    {version = ">=1.49.1,<2.0dev", optional = true, markers = "python_version >= \"3.11\" and extra == \"grpc\""},
 ]
 grpcio-status = [
-    {version = ">=1.49.1,<2.0.dev0", optional = true, markers = "python_version >= \"3.11\" and extra == \"grpc\""},
     {version = ">=1.33.2,<2.0.dev0", optional = true, markers = "python_version < \"3.11\" and extra == \"grpc\""},
+    {version = ">=1.49.1,<2.0.dev0", optional = true, markers = "python_version >= \"3.11\" and extra == \"grpc\""},
 ]
 proto-plus = ">=1.22.3,<2.0.0dev"
 protobuf = ">=3.19.5,<3.20.0 || >3.20.0,<3.20.1 || >3.20.1,<4.21.0 || >4.21.0,<4.21.1 || >4.21.1,<4.21.2 || >4.21.2,<4.21.3 || >4.21.3,<4.21.4 || >4.21.4,<4.21.5 || >4.21.5,<6.0.0.dev0"
@@ -2965,7 +2965,7 @@ name = "graspologic"
 version = "3.4.1"
 description = "A set of Python modules for graph statistics"
 optional = false
-python-versions = "<3.13,>=3.9"
+python-versions = ">=3.9,<3.13"
 files = [
     {file = "graspologic-3.4.1-py3-none-any.whl", hash = "sha256:c6563e087eda599bad1de831d4b7321c0daa7a82f4e85a7d7737ff67e07cdda2"},
     {file = "graspologic-3.4.1.tar.gz", hash = "sha256:7561f0b852a2bccd351bff77e8db07d9892f9dfa35a420fdec01690e4fdc8075"},
@@ -3650,7 +3650,7 @@ name = "infinity-emb"
 version = "0.0.66"
 description = "Infinity is a high-throughput, low-latency REST API for serving text-embeddings, reranking models and clip."
 optional = false
-python-versions = "<4,>=3.9"
+python-versions = ">=3.9,<4"
 files = [
     {file = "infinity_emb-0.0.66-py3-none-any.whl", hash = "sha256:1dc6ed9fa48e6cbe83650a7583dbbb4bc393900c39c326bb0aff2ddc090ac018"},
     {file = "infinity_emb-0.0.66.tar.gz", hash = "sha256:9c9a361ccebf8e8f626c1f685286518d03d0c35e7d14179ae7c2500b4fc68b98"},
@@ -4098,7 +4098,7 @@ name = "litellm"
 version = "1.48.0"
 description = "Library to easily interface with LLM API providers"
 optional = false
-python-versions = "!=2.7.*,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,!=3.7.*,>=3.8"
+python-versions = ">=3.8, !=2.7.*, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*, !=3.6.*, !=3.7.*"
 files = [
     {file = "litellm-1.48.0-py3-none-any.whl", hash = "sha256:7765e8a92069778f5fc66aacfabd0e2f8ec8d74fb117f5e475567d89b0d376b9"},
     {file = "litellm-1.48.0.tar.gz", hash = "sha256:31a9b8a25a9daf44c24ddc08bf74298da920f2c5cea44135e5061278d0aa6fc9"},
@@ -5416,9 +5416,9 @@ files = [
 
 [package.dependencies]
 numpy = [
-    {version = ">=1.23.5", markers = "python_version >= \"3.11\" and python_version < \"3.12\""},
     {version = ">=1.21.4", markers = "python_version >= \"3.10\" and platform_system == \"Darwin\" and python_version < \"3.11\""},
     {version = ">=1.21.2", markers = "platform_system != \"Darwin\" and python_version >= \"3.10\" and python_version < \"3.11\""},
+    {version = ">=1.23.5", markers = "python_version >= \"3.11\" and python_version < \"3.12\""},
     {version = ">=1.26.0", markers = "python_version >= \"3.12\""},
 ]
 
@@ -5440,9 +5440,9 @@ files = [
 
 [package.dependencies]
 numpy = [
-    {version = ">=1.23.5", markers = "python_version >= \"3.11\" and python_version < \"3.12\""},
     {version = ">=1.21.4", markers = "python_version >= \"3.10\" and platform_system == \"Darwin\" and python_version < \"3.11\""},
     {version = ">=1.21.2", markers = "platform_system != \"Darwin\" and python_version >= \"3.10\" and python_version < \"3.11\""},
+    {version = ">=1.23.5", markers = "python_version >= \"3.11\" and python_version < \"3.12\""},
     {version = ">=1.26.0", markers = "python_version >= \"3.12\""},
 ]
 
@@ -5657,8 +5657,8 @@ files = [
 
 [package.dependencies]
 numpy = [
-    {version = ">=1.23.2", markers = "python_version == \"3.11\""},
     {version = ">=1.22.4", markers = "python_version < \"3.11\""},
+    {version = ">=1.23.2", markers = "python_version == \"3.11\""},
     {version = ">=1.26.0", markers = "python_version >= \"3.12\""},
 ]
 python-dateutil = ">=2.8.2"
@@ -6276,7 +6276,7 @@ name = "psutil"
 version = "6.1.0"
 description = "Cross-platform lib for process and system monitoring in Python."
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,>=2.7"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
 files = [
     {file = "psutil-6.1.0-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:ff34df86226c0227c52f38b919213157588a678d049688eded74c76c8ba4a5d0"},
     {file = "psutil-6.1.0-cp27-cp27m-manylinux2010_i686.whl", hash = "sha256:c0e0c00aa18ca2d3b2b991643b799a15fc8f0563d2ebb6040f64ce8dc027b942"},
@@ -6298,8 +6298,8 @@ files = [
 ]
 
 [package.extras]
-dev = ["black", "check-manifest", "coverage", "packaging", "pylint", "pyperf", "pypinfo", "pytest-cov", "requests", "rstcheck", "ruff", "sphinx", "sphinx_rtd_theme", "toml-sort", "twine", "virtualenv", "wheel"]
-test = ["pytest", "pytest-xdist", "setuptools"]
+dev = ["black", "check-manifest", "coverage", "packaging", "pylint", "pyperf", "pypinfo", "pytest-cov", "requests", "rstcheck", "ruff", "sphinx", "sphinx-rtd-theme", "toml-sort", "twine", "virtualenv", "wheel"]
+test = ["enum34", "futures", "ipaddress", "mock (==1.0.1)", "pytest (==4.6.11)", "pytest-xdist", "setuptools", "unittest2"]
 
 [[package]]
 name = "psycopg2-binary"
@@ -7803,40 +7803,30 @@ files = [
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     {file = "ruamel.yaml.clib-0.2.12-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:fd5415dded15c3822597455bc02bcd66e81ef8b7a48cb71a33628fc9fdde39df"},
     {file = "ruamel.yaml.clib-0.2.12-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:f66efbc1caa63c088dead1c4170d148eabc9b80d95fb75b6c92ac0aad2437d76"},
-    {file = "ruamel.yaml.clib-0.2.12-cp310-cp310-musllinux_1_1_i686.whl", hash = "sha256:22353049ba4181685023b25b5b51a574bce33e7f51c759371a7422dcae5402a6"},
-    {file = "ruamel.yaml.clib-0.2.12-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:932205970b9f9991b34f55136be327501903f7c66830e9760a8ffb15b07f05cd"},
     {file = "ruamel.yaml.clib-0.2.12-cp310-cp310-win32.whl", hash = "sha256:3eac5a91891ceb88138c113f9db04f3cebdae277f5d44eaa3651a4f573e6a5da"},
     {file = "ruamel.yaml.clib-0.2.12-cp310-cp310-win_amd64.whl", hash = "sha256:ab007f2f5a87bd08ab1499bdf96f3d5c6ad4dcfa364884cb4549aa0154b13a28"},
     {file = "ruamel.yaml.clib-0.2.12-cp311-cp311-macosx_13_0_arm64.whl", hash = "sha256:4a6679521a58256a90b0d89e03992c15144c5f3858f40d7c18886023d7943db6"},
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     {file = "ruamel.yaml.clib-0.2.12-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:bb43a269eb827806502c7c8efb7ae7e9e9d0573257a46e8e952f4d4caba4f31e"},
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-    {file = "ruamel.yaml.clib-0.2.12-cp312-cp312-musllinux_1_1_x86_64.whl", hash = "sha256:32621c177bbf782ca5a18ba4d7af0f1082a3f6e517ac2a18b3974d4edf349680"},
     {file = "ruamel.yaml.clib-0.2.12-cp312-cp312-win32.whl", hash = "sha256:e8c4ebfcfd57177b572e2040777b8abc537cdef58a2120e830124946aa9b42c5"},
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     {file = "ruamel.yaml.clib-0.2.12-cp313-cp313-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:96777d473c05ee3e5e3c3e999f5d23c6f4ec5b0c38c098b3a5229085f74236c6"},
-    {file = "ruamel.yaml.clib-0.2.12-cp313-cp313-musllinux_1_1_i686.whl", hash = "sha256:3bc2a80e6420ca8b7d3590791e2dfc709c88ab9152c00eeb511c9875ce5778bf"},
-    {file = "ruamel.yaml.clib-0.2.12-cp313-cp313-musllinux_1_1_x86_64.whl", hash = "sha256:e188d2699864c11c36cdfdada94d781fd5d6b0071cd9c427bceb08ad3d7c70e1"},
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     {file = "ruamel.yaml.clib-0.2.12-cp39-cp39-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:e2f1c3765db32be59d18ab3953f43ab62a761327aafc1594a2a1fbe038b8b8a7"},
-    {file = "ruamel.yaml.clib-0.2.12-cp39-cp39-musllinux_1_1_i686.whl", hash = "sha256:d85252669dc32f98ebcd5d36768f5d4faeaeaa2d655ac0473be490ecdae3c285"},
-    {file = "ruamel.yaml.clib-0.2.12-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:e143ada795c341b56de9418c58d028989093ee611aa27ffb9b7f609c00d813ed"},
     {file = "ruamel.yaml.clib-0.2.12-cp39-cp39-win32.whl", hash = "sha256:beffaed67936fbbeffd10966a4eb53c402fafd3d6833770516bf7314bc6ffa12"},
     {file = "ruamel.yaml.clib-0.2.12-cp39-cp39-win_amd64.whl", hash = "sha256:040ae85536960525ea62868b642bdb0c2cc6021c9f9d507810c0c604e66f5a7b"},
     {file = "ruamel.yaml.clib-0.2.12.tar.gz", hash = "sha256:6c8fbb13ec503f99a91901ab46e0b07ae7941cd527393187039aec586fdfd36f"},
@@ -7847,7 +7837,7 @@ name = "s3transfer"
 version = "0.10.4"
 description = "An Amazon S3 Transfer Manager"
 optional = false
-python-versions = ">=3.8"
+python-versions = ">= 3.8"
 files = [
     {file = "s3transfer-0.10.4-py3-none-any.whl", hash = "sha256:244a76a24355363a68164241438de1b72f8781664920260c48465896b712a41e"},
     {file = "s3transfer-0.10.4.tar.gz", hash = "sha256:29edc09801743c21eb5ecbc617a152df41d3c287f67b615f73e5f750583666a7"},
@@ -8309,7 +8299,7 @@ name = "smart-open"
 version = "7.0.5"
 description = "Utils for streaming large files (S3, HDFS, GCS, Azure Blob Storage, gzip, bz2...)"
 optional = false
-python-versions = "<4.0,>=3.7"
+python-versions = ">=3.7,<4.0"
 files = [
     {file = "smart_open-7.0.5-py3-none-any.whl", hash = "sha256:8523ed805c12dff3eaa50e9c903a6cb0ae78800626631c5fe7ea073439847b89"},
     {file = "smart_open-7.0.5.tar.gz", hash = "sha256:d3672003b1dbc85e2013e4983b88eb9a5ccfd389b0d4e5015f39a9ee5620ec18"},
@@ -10119,4 +10109,4 @@ cffi = ["cffi (>=1.11)"]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.10,<3.13"
-content-hash = "6e401212ce8c6499bc8c687355a6cfe7d0fc2beecf21e7895546f82a2b4332cd"
+content-hash = "69fbe11a30c649544196546b9384ca5972bfd17a923b7dc8ff340f790984b5df"
diff --git a/pyproject.toml b/pyproject.toml
index 01dcc7de995..3aea0db40be 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -121,6 +121,7 @@ pyicu = "^2.13.1"
 flasgger = "^0.9.7.1"
 polars = { version = "^1.9.0", markers = "platform_machine == 'x86_64'" }
 polars-lts-cpu = { version = "^1.9.0", markers = "platform_machine == 'arm64'" }
+xxhash = "^3.5.0"
 
 
 [tool.poetry.group.full]
diff --git a/rag/svr/task_executor.py b/rag/svr/task_executor.py
index 6d971a5d794..10a2082c6a9 100644
--- a/rag/svr/task_executor.py
+++ b/rag/svr/task_executor.py
@@ -39,8 +39,9 @@
 import tracemalloc
 
 import numpy as np
+from peewee import DoesNotExist
 
-from api.db import LLMType, ParserType
+from api.db import LLMType, ParserType, TaskStatus
 from api.db.services.dialog_service import keyword_extraction, question_proposal
 from api.db.services.document_service import DocumentService
 from api.db.services.llm_service import LLMBundle
@@ -89,12 +90,23 @@
 FAILED_TASKS = 0
 CURRENT_TASK = None
 
+class TaskCanceledException(Exception):
+    def __init__(self, msg):
+        self.msg = msg
 
 def set_progress(task_id, from_page=0, to_page=-1, prog=None, msg="Processing..."):
     global PAYLOAD
     if prog is not None and prog < 0:
         msg = "[ERROR]" + msg
-    cancel = TaskService.do_cancel(task_id)
+    try:
+        cancel = TaskService.do_cancel(task_id)
+    except DoesNotExist:
+        logging.warning(f"set_progress task {task_id} is unknown")
+        if PAYLOAD:
+            PAYLOAD.ack()
+            PAYLOAD = None
+        return
+
     if cancel:
         msg += " [Canceled]"
         prog = -1
@@ -105,18 +117,22 @@ def set_progress(task_id, from_page=0, to_page=-1, prog=None, msg="Processing...
     d = {"progress_msg": msg}
     if prog is not None:
         d["progress"] = prog
+
+    logging.info(f"set_progress({task_id}), progress: {prog}, progress_msg: {msg}")
     try:
-        logging.info(f"set_progress({task_id}), progress: {prog}, progress_msg: {msg}")
         TaskService.update_progress(task_id, d)
-    except Exception:
-        logging.exception(f"set_progress({task_id}) got exception")
-
-    close_connection()
-    if cancel:
+    except DoesNotExist:
+        logging.warning(f"set_progress task {task_id} is unknown")
         if PAYLOAD:
             PAYLOAD.ack()
             PAYLOAD = None
-        os._exit(0)
+        return
+
+    close_connection()
+    if cancel and PAYLOAD:
+        PAYLOAD.ack()
+        PAYLOAD = None
+        raise TaskCanceledException(msg)
 
 
 def collect():
@@ -136,16 +152,22 @@ def collect():
     if not msg:
         return None
 
-    if TaskService.do_cancel(msg["id"]):
-        with mt_lock:
-            DONE_TASKS += 1
-        logging.info("Task {} has been canceled.".format(msg["id"]))
-        return None
-    task = TaskService.get_task(msg["id"])
-    if not task:
+    task = None
+    canceled = False
+    try:
+        task = TaskService.get_task(msg["id"])
+        if task:
+            _, doc = DocumentService.get_by_id(task["doc_id"])
+            canceled = doc.run == TaskStatus.CANCEL.value or doc.progress < 0
+    except DoesNotExist:
+        pass
+    except Exception:
+        logging.exception("collect get_task exception")
+    if not task or canceled:
+        state = "is unknown" if not task else "has been cancelled"
         with mt_lock:
             DONE_TASKS += 1
-        logging.warning("{} empty task!".format(msg["id"]))
+        logging.info(f"collect task {msg['id']} {state}")
         return None
 
     if msg.get("type", "") == "raptor":
@@ -186,6 +208,8 @@ def build_chunks(task, progress_callback):
                             to_page=task["to_page"], lang=task["language"], callback=progress_callback,
                             kb_id=task["kb_id"], parser_config=task["parser_config"], tenant_id=task["tenant_id"])
         logging.info("Chunking({}) {}/{} done".format(timer() - st, task["location"], task["name"]))
+    except TaskCanceledException:
+        raise
     except Exception as e:
         progress_callback(-1, "Internal server error while chunking: %s" % str(e).replace("'", ""))
         logging.exception("Chunking {}/{} got exception".format(task["location"], task["name"]))
@@ -358,6 +382,8 @@ def run_raptor(row, chat_mdl, embd_mdl, callback=None):
     return res, tk_count, vector_size
 
 
+
+
 def do_handle_task(task):
     task_id = task["id"]
     task_from_page = task["from_page"]
@@ -373,6 +399,16 @@ def do_handle_task(task):
 
     # prepare the progress callback function
     progress_callback = partial(set_progress, task_id, task_from_page, task_to_page)
+
+    try:
+        task_canceled = TaskService.do_cancel(task_id)
+    except DoesNotExist:
+        logging.warning(f"task {task_id} is unknown")
+        return
+    if task_canceled:
+        progress_callback(-1, msg="Task has been canceled.")
+        return
+
     try:
         # bind embedding model
         embedding_model = LLMBundle(task_tenant_id, LLMType.EMBEDDING, llm_name=task_embedding_id, lang=task_language)
@@ -390,6 +426,8 @@ def do_handle_task(task):
 
             # run RAPTOR
             chunks, token_count, vector_size = run_raptor(task, chat_model, embedding_model, progress_callback)
+        except TaskCanceledException:
+            raise
         except Exception as e:
             error_message = f'Fail to bind LLM used by RAPTOR: {str(e)}'
             progress_callback(-1, msg=error_message)
@@ -420,6 +458,7 @@ def do_handle_task(task):
         progress_message = "Embedding chunks ({:.2f}s)".format(timer() - start_ts)
         logging.info(progress_message)
         progress_callback(msg=progress_message)
+
     # logging.info(f"task_executor init_kb index {search.index_name(task_tenant_id)} embedding_model {embedding_model.llm_name} vector length {vector_size}")
     init_kb(task, vector_size)
     chunk_count = len(set([chunk["id"] for chunk in chunks]))
@@ -430,23 +469,25 @@ def do_handle_task(task):
         doc_store_result = settings.docStoreConn.insert(chunks[b:b + es_bulk_size], search.index_name(task_tenant_id), task_dataset_id)
         if b % 128 == 0:
             progress_callback(prog=0.8 + 0.1 * (b + 1) / len(chunks), msg="")
-    logging.info("Indexing {} elapsed: {:.2f}".format(task_document_name, timer() - start_ts))
-    if doc_store_result:
-        error_message = f"Insert chunk error: {doc_store_result}, please check log file and Elasticsearch/Infinity status!"
-        progress_callback(-1, msg=error_message)
-        settings.docStoreConn.delete({"doc_id": task_doc_id}, search.index_name(task_tenant_id), task_dataset_id)
-        logging.error(error_message)
-        raise Exception(error_message)
-
-    if TaskService.do_cancel(task_id):
-        settings.docStoreConn.delete({"doc_id": task_doc_id}, search.index_name(task_tenant_id), task_dataset_id)
-        return
+        if doc_store_result:
+            error_message = f"Insert chunk error: {doc_store_result}, please check log file and Elasticsearch/Infinity status!"
+            progress_callback(-1, msg=error_message)
+            raise Exception(error_message)
+        chunk_ids = [chunk["id"] for chunk in chunks[:b + es_bulk_size]]
+        chunk_ids_str = " ".join(chunk_ids)
+        try:
+            TaskService.update_chunk_ids(task["id"], chunk_ids_str)
+        except DoesNotExist:
+            logging.warning(f"do_handle_task update_chunk_ids failed since task {task['id']} is unknown.")
+            doc_store_result = settings.docStoreConn.delete({"id": chunk_ids}, search.index_name(task_tenant_id), task_dataset_id)
+            return
+    logging.info("Indexing doc({}), page({}-{}), chunks({}), elapsed: {:.2f}".format(task_document_name, task_from_page, task_to_page, len(chunks), timer() - start_ts))
 
     DocumentService.increment_chunk_num(task_doc_id, task_dataset_id, token_count, chunk_count, 0)
 
     time_cost = timer() - start_ts
     progress_callback(prog=1.0, msg="Done ({:.2f}s)".format(time_cost))
-    logging.info("Chunk doc({}), token({}), chunks({}), elapsed:{:.2f}".format(task_id, token_count, len(chunks), time_cost))
+    logging.info("Chunk doc({}), page({}-{}), chunks({}), token({}), elapsed:{:.2f}".format(task_document_name, task_from_page, task_to_page, len(chunks), token_count, time_cost))
 
 
 def handle_task():
@@ -462,6 +503,12 @@ def handle_task():
                 DONE_TASKS += 1
                 CURRENT_TASK = None
             logging.info(f"handle_task done for task {json.dumps(task)}")
+        except TaskCanceledException:
+            with mt_lock:
+                DONE_TASKS += 1
+                CURRENT_TASK = None
+            logging.info(f"handle_task got TaskCanceledException for task {json.dumps(task)}")
+            logging.debug("handle_task got TaskCanceledException", exc_info=True)
         except Exception:
             with mt_lock:
                 FAILED_TASKS += 1