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Data corruption when copying big file through python API copy_object #1415

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mat-gas opened this issue Apr 30, 2024 · 7 comments · Fixed by #1416
Closed

Data corruption when copying big file through python API copy_object #1415

mat-gas opened this issue Apr 30, 2024 · 7 comments · Fixed by #1416
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community fixed

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@mat-gas
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mat-gas commented Apr 30, 2024

We have ISO files stored on our minio server that were uploaded years ago

Those are heavily chunked (8 MiB parts)

When copying one of those ISO to another bucket, the new file is corrupted (size differs and 2nd chunk is a copy of the first one, albeit the size)

example with Win10_22H2_English_x64.iso (size 6115186688 , md5 68c70d7ade5e9ab8510876c1f4bee58a)

$ mc cat s3/vms/iso/Win10_22H2_English_x64.iso > /tmp/Win10_22H2_English_x64.iso

$ ls -al /tmp/Win10_22H2_English_x64.iso
-rw-rw-r-- 1 mat mat 6115186688 avril 30 13:04 /tmp/Win10_22H2_English_x64.iso

$ md5sum /tmp/Win10_22H2_English_x64.iso
68c70d7ade5e9ab8510876c1f4bee58a  /tmp/Win10_22H2_English_x64.iso

copy with python minio API

client = Minio("xxxxxx,
                "xxxxxxxxx",
                "xxxxxxxx",
                secure=False,
                )
client.copy_object("temp", "copy-win10", CopySource("vms", "iso/Win10_22H2_English_x64.iso"))

download again, file is corrupted:

  • slightly bigger (seen 2 or 12 bytes additional bytes)
  • data in part2 is actually data from part1 (part 1 is always 0x14000001 bytes and part2 is the same as part1 except it's smaller)
mc cat s3/temp/copy-win10 > /tmp/copy-win10

ll /tmp/copy-win10
-rw-rw-r-- 1 mat mat 6115186690 avril 30 13:09 /tmp/copy-win10

md5sum /tmp/copy-win10
5cc45c2871d7946360c630bc22702f9a  /tmp/copy-win10

image

original file at offset 0x8000, we can see xCD001...

hd /tmp/Win10_22H2_English_x64.iso |head
00000000  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00008000  01 43 44 30 30 31 01 00  20 20 20 20 20 20 20 20  |.CD001..        |
00008010  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
00008020  20 20 20 20 20 20 20 20  43 43 43 4f 4d 41 5f 58  |        CCCOMA_X|
00008030  36 34 46 52 45 5f 45 4e  2d 55 53 5f 44 56 39 20  |64FRE_EN-US_DV9 |
00008040  20 20 20 20 20 20 20 20  00 00 00 00 00 00 00 00  |        ........|
00008050  cb 8f 2d 00 00 2d 8f cb  00 00 00 00 00 00 00 00  |..-..-..........|
00008060  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00008070  00 00 00 00 00 00 00 00  01 00 00 01 01 00 00 01  |................|

and in corrupted file, second chunk (that starts at offset 0x14000001 , we can see at offset 0x8000 after that we have the same data)

image

When using mc cp, the problem does not appear (file is still OK).

mc cp s3/vms/iso/Win10_22H2_English_x64.iso s3/temp/copy-win10-2

When looking at the xl.meta file, we can see that it's chunked differently (lots of 500 MiB chunks instead of 2 chunks (1 very big and 1 small))

xl.meta of original file (Win10_22H2_English_x64.iso)

{
  "Versions": [
    {
      "Header": {
        "Flags": 2,
        "ModTime": "2023-03-31T15:52:48.262030574Z",
        "Signature": "0af826f5",
        "Type": 1,
        "VersionID": "00000000000000000000000000000000"
      },
      "Idx": 0,
      "Metadata": {
        "Type": 1,
        "V2Obj": {
          "CSumAlgo": 1,
          "DDir": "m58zKSb4TlK2t+GBv2ZjEQ==",
          "EcAlgo": 1,
          "EcBSize": 1048576,
          "EcDist": [
            8,
            9,
            10,
            11,
            12,
            13,
            14,
            15,
            16,
            1,
            2,
            3,
            4,
            5,
            6,
            7
          ],
          "EcIndex": 4,
          "EcM": 12,
          "EcN": 4,
          "ID": "AAAAAAAAAAAAAAAAAAAAAA==",
          "MTime": 1680277968262030574,
          "MetaSys": {
            "X-Minio-Internal-actual-size": "NjExNTE4NjY4OA=="
          },
          "MetaUsr": {
            "content-type": "application/octet-stream",
            "etag": "f0bfc2ed484b4753671d7f198fc4ab8a-729"
          },
          "PartASizes": [
            8388608,
            8388608,
            8388608,
            8388608,
    ....
            8388608,
            8388608,
            8388608,
            8388608,
            8388608,
            8388608,
            8280064
          ],
          "PartETags": null,
          "PartNums": [
            1,
            2,
            3,
            4,
            5,
     ....
            724,
            725,
            726,
            727,
            728,
            729
          ],
          "PartSizes": [
            8388608,
            8388608,
            8388608,
            8388608,
       ....
            8388608,
            8388608,
            8388608,
            8388608,
            8388608,
            8280064
          ],
          "Size": 6115186688
        },
        "v": 1670873247
      }
    }
  ]
}

xl.meta of copy file through python package

  • 2 chunks (5368709121 (0x14000001) + 746477569 (the rest))
  • size is bad (6115186690 instead of 6115186688)
{
  "Versions": [
    {
      "Header": {
        "Flags": 2,
        "ModTime": "2024-04-30T11:07:19.285158502Z",
        "Signature": "116281b7",
        "Type": 1,
        "VersionID": "00000000000000000000000000000000"
      },
      "Idx": 0,
      "Metadata": {
        "Type": 1,
        "V2Obj": {
          "CSumAlgo": 1,
          "DDir": "n9/l3oUlSaelyWQuHBjcvA==",
          "EcAlgo": 1,
          "EcBSize": 1048576,
          "EcDist": [
            3,
            4,
            5,
            6,
            7,
            8,
            9,
            10,
            11,
            12,
            13,
            14,
            15,
            16,
            1,
            2
          ],
          "EcIndex": 4,
          "EcM": 11,
          "EcN": 5,
          "ID": "AAAAAAAAAAAAAAAAAAAAAA==",
          "MTime": 1714475239285158502,
          "MetaSys": {
            "X-Minio-Internal-actual-size": "NjExNTE4NjY5MA==",
            "x-minio-internal-erasure-upgraded": "NC0+NQ=="
          },
          "MetaUsr": {
            "content-type": "application/octet-stream",
            "etag": "fa1a218abd93d72edc528a24b29631bd-2"
          },
          "PartASizes": [
            5368709121,
            746477569
          ],
          "PartETags": null,
          "PartNums": [
            1,
            2
          ],
          "PartSizes": [
            5368709121,
            746477569
          ],
          "Size": 6115186690
        },
        "v": 1711791716
      }
    }
  ]
}

xl.meta from "mc cp" (size os good, file is OK)

{
  "Versions": [
    {
      "Header": {
        "Flags": 2,
        "ModTime": "2024-04-30T11:44:50.810659541Z",
        "Signature": "212c471f",
        "Type": 1,
        "VersionID": "00000000000000000000000000000000"
      },
      "Idx": 0,
      "Metadata": {
        "Type": 1,
        "V2Obj": {
          "CSumAlgo": 1,
          "DDir": "iq/P9//wTZmse8HaQxRnlw==",
          "EcAlgo": 1,
          "EcBSize": 1048576,
          "EcDist": [
            15,
            16,
            1,
            2,
            3,
            4,
            5,
            6,
            7,
            8,
            9,
            10,
            11,
            12,
            13,
            14
          ],
          "EcIndex": 12,
          "EcM": 11,
          "EcN": 5,
          "ID": "AAAAAAAAAAAAAAAAAAAAAA==",
          "MTime": 1714477490810659541,
          "MetaSys": {
            "X-Minio-Internal-actual-size": "NjExNTE4NjY4OA==",
            "x-minio-internal-erasure-upgraded": "NC0+NQ=="
          },
          "MetaUsr": {
            "content-type": "application/octet-stream",
            "etag": "5ecf8f43cc2b14d6c0aced8814362747-12"
          },
          "PartASizes": [
            509598891,
            509598891,
            509598891,
            509598891,
            509598891,
            509598891,
            509598891,
            509598891,
            509598890,
            509598890,
            509598890,
            509598890
          ],
          "PartETags": null,
          "PartNums": [
            1,
            2,
            3,
            4,
            5,
            6,
            7,
            8,
            9,
            10,
            11,
            12
          ],
          "PartSizes": [
            509598891,
            509598891,
            509598891,
            509598891,
            509598891,
            509598891,
            509598891,
            509598891,
            509598890,
            509598890,
            509598890,
            509598890
          ],
          "Size": 6115186688
        },
        "v": 1711791716
      }
    }
  ]
}

Your Environment

minio RELEASE.2024-03-30T09-41-56Z

python minio package 7.2.5
@mat-gas
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mat-gas commented Apr 30, 2024 •
edited
Loading

OK, it might be related to the python API not raising any error/exception actually

compose_object should handle it transparently? (in here

minio-py/minio/api.py

Line 1362 in e10196f

return self.compose_object(
)

  • tried uploading a 6 GiB file (test-upload)
  • copied it with python API (test-upload2)
  • 2 chunks as a result and data is corrupted (no alert, no exception, ...)
client.copy_object("temp", "test-upload2", CopySource("temp", "test-upload"))

or should a hard exception be raised instead of copying data and corrupting the copy?

image

minio-py/minio/api.py

Line 1268 in e10196f

In this API maximum supported source object size is 5GiB.

or it it a bug in compose_object where start_bytes is always == offset (here 0) at line 1620 whereas remaining size is still updated at line 1621 ?

image

@mat-gas mat-gas changed the title Data corruption when copying previously chunked files through python API Data corruption when copying big file through python API copy_object Apr 30, 2024
@harshavardhana
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In a multipart what are the final parts matter since server doesn't know the whole of the object.

Can you share a proper reproducer?

@harshavardhana harshavardhana transferred this issue from minio/minio Apr 30, 2024
@balamurugana
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@mat-gas Enable Minio.trace_on() and share the output.

@mat-gas
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mat-gas commented Apr 30, 2024

  • build test file:
dd if=/dev/zero of=/tmp/zero bs=1G count=6
echo "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" > /tmp/test-upload3
cat /tmp/zero >> /tmp/test-upload3

md5sum /tmp/test-upload3
e3d297afb6078748ce597e88bcab5316  /tmp/test-upload3

ls -al /tmp/test-upload
-rw-rw-r-- 1 mat mat 6442450982 avril 30 11:52 /tmp/test-upload3
  • upload on minio using HTTP GUI
  • check xl.meta on disk
{
  "Versions": [
    {
      "Header": {
        "Flags": 2,
        "ModTime": "2024-04-30T15:27:46.484578361Z",
        "Signature": "1b3500c5",
        "Type": 1,
        "VersionID": "00000000000000000000000000000000"
      },
      "Idx": 0,
      "Metadata": {
        "Type": 1,
        "V2Obj": {
          "CSumAlgo": 1,
          "DDir": "/8hFEFpcQleRWuS3ACrRvg==",
          "EcAlgo": 1,
          "EcBSize": 1048576,
          "EcDist": [
            10,
            11,
            12,
            13,
            14,
            15,
            16,
            1,
            2,
            3,
            4,
            5,
            6,
            7,
            8,
            9
          ],
          "EcIndex": 7,
          "EcM": 11,
          "EcN": 5,
          "ID": "AAAAAAAAAAAAAAAAAAAAAA==",
          "MTime": 1714490866484578361,
          "MetaSys": {
            "x-minio-internal-erasure-upgraded": "NC0+NQ=="
          },
          "MetaUsr": {
            "content-type": "application/octet-stream",
            "etag": "e3d297afb6078748ce597e88bcab5316"
          },
          "PartASizes": [
            6442450982
          ],
          "PartETags": null,
          "PartNums": [
            1
          ],
          "PartSizes": [
            6442450982
          ],
          "Size": 6442450982
        },
        "v": 1711791716
      }
    }
  ]
}
  • stat on file gives the same size:
>>> s=client.stat_object("temp", "test-upload3")    
>>> s.size
6442450982

  • copy file : client.copy_object("temp", "test-upload4", CopySource("temp", "test-upload3"))

  • stat on new file (note the 2 additional bytes):

client.stat_object("temp", "test-upload4").size
6442450984
  • xl.meta on test-upload4 (copied file)
{
  "Versions": [
    {
      "Header": {
        "Flags": 2,
        "ModTime": "2024-04-30T15:39:03.075700792Z",
        "Signature": "5e1c9f8c",
        "Type": 1,
        "VersionID": "00000000000000000000000000000000"
      },
      "Idx": 0,
      "Metadata": {
        "Type": 1,
        "V2Obj": {
          "CSumAlgo": 1,
          "DDir": "Z1VPwIFAT+6+u/SR+S5vkg==",
          "EcAlgo": 1,
          "EcBSize": 1048576,
          "EcDist": [
            13,
            14,
            15,
            16,
            1,
            2,
            3,
            4,
            5,
            6,
            7,
            8,
            9,
            10,
            11,
            12
          ],
          "EcIndex": 10,
          "EcM": 11,
          "EcN": 5,
          "ID": "AAAAAAAAAAAAAAAAAAAAAA==",
          "MTime": 1714491543075700792,
          "MetaSys": {
            "X-Minio-Internal-actual-size": "NjQ0MjQ1MDk4NA==",
            "x-minio-internal-erasure-upgraded": "NC0+NQ=="
          },
          "MetaUsr": {
            "content-type": "application/octet-stream",
            "etag": "b70e57ea6e8dd07a73ebf717c8b09e3b-2"
          },
          "PartASizes": [
            5368709121,
            1073741863
          ],
          "PartETags": null,
          "PartNums": [
            1,
            2
          ],
          "PartSizes": [
            5368709121,
            1073741863
          ],
          "Size": 6442450984
        },
        "v": 1711791716
      }
    }
  ]
}

logs from trace_on:

problem probably comes from byte-range in part2+ which starts again at 0 instead of being at 5 Gib+

PUT /temp/test-upload4?partNumber=2..

X-Amz-Copy-Source-Range: bytes=0-1073741862

PUT /temp/test-upload4?partNumber=2&uploadId=MjViYjlkZjktMDFjMi00MjBhLWIxZDUtOTdkZDFlZTNmOWExLmVlZmY4ZmQ2LThiZWMtNGI1ZS05MjVlLTk2NWE0Yzk5ZmEzMg HTTP/1.1
X-Amz-Copy-Source: /temp/test-upload3
X-Amz-Copy-Source-If-Match: e3d297afb6078748ce597e88bcab5316
X-Amz-Copy-Source-Range: bytes=0-1073741862


---------START-HTTP---------
HEAD /temp/test-upload3 HTTP/1.1
Host: xxxxxxx:9000
User-Agent: MinIO (Linux; x86_64) minio-py/7.2.5
X-Amz-Content-Sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
X-Amz-Date: 20240430T153839Z
Authorization: AWS4-HMAC-SHA256 Credential=*REDACTED*/20240430/us-east-1/s3/aws4_request, SignedHeaders=host;x-amz-content-sha256;x-amz-date, Signature=*REDACTED*

HTTP/1.1 200
Accept-Ranges: bytes
Content-Length: 6442450982
Content-Type: application/octet-stream
ETag: "e3d297afb6078748ce597e88bcab5316"
Last-Modified: Tue, 30 Apr 2024 15:27:46 GMT
Server: MinIO
Strict-Transport-Security: max-age=31536000; includeSubDomains
Vary: Origin
Vary: Accept-Encoding
X-Amz-Id-2: 6030d01c843caef4c6622bc183cd7868c4457173df9b0e60c3980e7c86b7b0b4
X-Amz-Request-Id: 17CB18F3FFD63302
X-Content-Type-Options: nosniff
X-Xss-Protection: 1; mode=block
Date: Tue, 30 Apr 2024 15:38:39 GMT


----------END-HTTP----------
---------START-HTTP---------
HEAD /temp/test-upload3 HTTP/1.1
Host: xxxxxxx:9000
User-Agent: MinIO (Linux; x86_64) minio-py/7.2.5
X-Amz-Content-Sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
X-Amz-Date: 20240430T153839Z
Authorization: AWS4-HMAC-SHA256 Credential=*REDACTED*/20240430/us-east-1/s3/aws4_request, SignedHeaders=host;x-amz-content-sha256;x-amz-date, Signature=*REDACTED*

HTTP/1.1 200
Accept-Ranges: bytes
Content-Length: 6442450982
Content-Type: application/octet-stream
ETag: "e3d297afb6078748ce597e88bcab5316"
Last-Modified: Tue, 30 Apr 2024 15:27:46 GMT
Server: MinIO
Strict-Transport-Security: max-age=31536000; includeSubDomains
Vary: Origin
Vary: Accept-Encoding
X-Amz-Id-2: 6030d01c843caef4c6622bc183cd7868c4457173df9b0e60c3980e7c86b7b0b4
X-Amz-Request-Id: 17CB18F4003531B0
X-Content-Type-Options: nosniff
X-Xss-Protection: 1; mode=block
Date: Tue, 30 Apr 2024 15:38:39 GMT


----------END-HTTP----------
---------START-HTTP---------
POST /temp/test-upload4?uploads= HTTP/1.1
Content-Type: application/octet-stream
Host: xxxxxxx:9000
User-Agent: MinIO (Linux; x86_64) minio-py/7.2.5
X-Amz-Content-Sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
X-Amz-Date: 20240430T153839Z
Authorization: AWS4-HMAC-SHA256 Credential=*REDACTED*/20240430/us-east-1/s3/aws4_request, SignedHeaders=content-type;host;x-amz-content-sha256;x-amz-date, Signature=*REDACTED*

HTTP/1.1 200
Accept-Ranges: bytes
Content-Length: 332
Content-Type: application/xml
Server: MinIO
Strict-Transport-Security: max-age=31536000; includeSubDomains
Vary: Origin
Vary: Accept-Encoding
X-Amz-Id-2: 6030d01c843caef4c6622bc183cd7868c4457173df9b0e60c3980e7c86b7b0b4
X-Amz-Request-Id: 17CB18F400D1180F
X-Content-Type-Options: nosniff
X-Xss-Protection: 1; mode=block
Date: Tue, 30 Apr 2024 15:38:39 GMT

<?xml version="1.0" encoding="UTF-8"?>
<InitiateMultipartUploadResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><Bucket>temp</Bucket><Key>test-upload4</Key><UploadId>MjViYjlkZjktMDFjMi00MjBhLWIxZDUtOTdkZDFlZTNmOWExLmVlZmY4ZmQ2LThiZWMtNGI1ZS05MjVlLTk2NWE0Yzk5ZmEzMg</UploadId></InitiateMultipartUploadResult>
----------END-HTTP----------
---------START-HTTP---------
PUT /temp/test-upload4?partNumber=1&uploadId=MjViYjlkZjktMDFjMi00MjBhLWIxZDUtOTdkZDFlZTNmOWExLmVlZmY4ZmQ2LThiZWMtNGI1ZS05MjVlLTk2NWE0Yzk5ZmEzMg HTTP/1.1
X-Amz-Copy-Source: /temp/test-upload3
X-Amz-Copy-Source-If-Match: e3d297afb6078748ce597e88bcab5316
X-Amz-Copy-Source-Range: bytes=0-5368709120
Host: xxxxxxx:9000
User-Agent: MinIO (Linux; x86_64) minio-py/7.2.5
X-Amz-Content-Sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
X-Amz-Date: 20240430T153839Z
Authorization: AWS4-HMAC-SHA256 Credential=*REDACTED*/20240430/us-east-1/s3/aws4_request, SignedHeaders=host;x-amz-content-sha256;x-amz-copy-source;x-amz-copy-source-if-match;x-amz-copy-source-range;x-amz-date, Signature=*REDACTED*

HTTP/1.1 200
Accept-Ranges: bytes
Content-Length: 228
Content-Type: application/xml
Server: MinIO
Strict-Transport-Security: max-age=31536000; includeSubDomains
Vary: Origin
Vary: Accept-Encoding
X-Amz-Id-2: 6030d01c843caef4c6622bc183cd7868c4457173df9b0e60c3980e7c86b7b0b4
X-Amz-Request-Id: 17CB18F401288A60
X-Content-Type-Options: nosniff
X-Xss-Protection: 1; mode=block
Date: Tue, 30 Apr 2024 15:38:59 GMT

<?xml version="1.0" encoding="UTF-8"?>
<CopyPartResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><LastModified>2024-04-30T15:38:59.237Z</LastModified><ETag>&#34;34dc525f81892828fdc1b4e815415a34&#34;</ETag></CopyPartResult>
----------END-HTTP----------
---------START-HTTP---------
PUT /temp/test-upload4?partNumber=2&uploadId=MjViYjlkZjktMDFjMi00MjBhLWIxZDUtOTdkZDFlZTNmOWExLmVlZmY4ZmQ2LThiZWMtNGI1ZS05MjVlLTk2NWE0Yzk5ZmEzMg HTTP/1.1
X-Amz-Copy-Source: /temp/test-upload3
X-Amz-Copy-Source-If-Match: e3d297afb6078748ce597e88bcab5316
X-Amz-Copy-Source-Range: bytes=0-1073741862
Host: xxxxxxx:9000
User-Agent: MinIO (Linux; x86_64) minio-py/7.2.5
X-Amz-Content-Sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
X-Amz-Date: 20240430T153859Z
Authorization: AWS4-HMAC-SHA256 Credential=*REDACTED*/20240430/us-east-1/s3/aws4_request, SignedHeaders=host;x-amz-content-sha256;x-amz-copy-source;x-amz-copy-source-if-match;x-amz-copy-source-range;x-amz-date, Signature=*REDACTED*

HTTP/1.1 200
Accept-Ranges: bytes
Content-Length: 228
Content-Type: application/xml
Server: MinIO
Strict-Transport-Security: max-age=31536000; includeSubDomains
Vary: Origin
Vary: Accept-Encoding
X-Amz-Id-2: 6030d01c843caef4c6622bc183cd7868c4457173df9b0e60c3980e7c86b7b0b4
X-Amz-Request-Id: 17CB18F89F391B01
X-Content-Type-Options: nosniff
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balamurugana added a commit to balamurugana/minio-py that referenced this issue Apr 30, 2024
@balamurugana
fix range calculation in compose_object API
e04b03d 
Fixes minio#1415

Signed-off-by: Bala.FA <[email protected]>
@balamurugana balamurugana mentioned this issue Apr 30, 2024
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@balamurugana
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@mat-gas Please check PR #1416 fixes the issue.

@mat-gas
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mat-gas commented Apr 30, 2024

@balamurugana confirmed the fix solves the issue

could you release a new version of the package on pypi with this fix please?
we've had serious data corruption due to this and would need the fix to continue working with our python scripts

anyway, thanks for the quick fix!

@minio-trusted
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minio-trusted commented Apr 30, 2024 •
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v7.2.7 is released.

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fix range calculation in compose_object API balamurugana/minio-py
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@harshavardhana @balamurugana @minio-trusted @mat-gas