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Posted to reviews@kudu.apache.org by "Gabriella Lotz (Code Review)" <ge...@cloudera.org> on 2025/10/13 13:31:54 UTC

[kudu-CR] KUDU-3708 Create Python example for array datatype

Gabriella Lotz has uploaded this change for review. ( http://gerrit.cloudera.org:8080/23531


Change subject: KUDU-3708 Create Python example for array datatype
......................................................................

KUDU-3708 Create Python example for array datatype

Add a Python client example demonstrating array data type operations
(insert, scan, update, delete), similar to the C++ example (95abb8d).

The example shows working with arrays containing NULL elements, empty
arrays, and arrays of varying lengths.

Also updated test-python-examples.sh to run the new example in CI
and updated the README to document it.

Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
---
M examples/python/basic-python-example/README.md
A examples/python/basic-python-example/array_example.py
M python/test-python-examples.sh
3 files changed, 200 insertions(+), 4 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/31/23531/1
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Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
Gerrit-PatchSet: 1
Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Kudu Jenkins (Code Review)" <ge...@cloudera.org>.
Kudu Jenkins has posted comments on this change. ( http://gerrit.cloudera.org:8080/23531 )

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Patch Set 3: Verified-1

Build Failed 

http://jenkins.kudu.apache.org/job/pre_commit/1992/ : FAILURE


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Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
Gerrit-PatchSet: 3
Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Reviewer: Zoltan Martonka <zm...@cloudera.com>
Gerrit-Comment-Date: Wed, 15 Oct 2025 16:16:56 +0000
Gerrit-HasComments: No

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Marton Greber (Code Review)" <ge...@cloudera.org>.
Marton Greber has submitted this change and it was merged. ( http://gerrit.cloudera.org:8080/23531 )

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................

KUDU-3708 Create Python example for array datatype

Add a Python client example demonstrating array data type operations
(insert, scan, update, delete), similar to the C++ example (95abb8d).

The example shows working with arrays containing NULL elements, empty
arrays, and arrays of varying lengths.

Also updated test-python-examples.sh to run the new example in CI
and updated the README to document it.

Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Reviewed-on: http://gerrit.cloudera.org:8080/23531
Reviewed-by: Zoltan Martonka <zm...@cloudera.com>
Reviewed-by: Marton Greber <gr...@gmail.com>
Tested-by: Marton Greber <gr...@gmail.com>
---
M examples/python/basic-python-example/README.md
A examples/python/basic-python-example/array_example.py
M python/test-python-examples.sh
3 files changed, 238 insertions(+), 4 deletions(-)

Approvals:
  Zoltan Martonka: Looks good to me, but someone else must approve
  Marton Greber: Looks good to me, approved; Verified

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Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
Gerrit-PatchSet: 4
Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Reviewer: Zoltan Martonka <zm...@cloudera.com>

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Zoltan Martonka (Code Review)" <ge...@cloudera.org>.
Zoltan Martonka has posted comments on this change. ( http://gerrit.cloudera.org:8080/23531 )

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Patch Set 1:

(6 comments)

http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py
File examples/python/basic-python-example/array_example.py:

http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@30
PS1, Line 30: # Parse arguments
            : parser = argparse.ArgumentParser(description='Array Data Type Example for Kudu Python.')
            : parser.add_argument('--masters', '-m', nargs='+', default='localhost',
            :                     help='The master address(es) to connect to Kudu.')
            : parser.add_argument('--ports', '-p', nargs='+', default='7051',
            :                     help='The master server port(s) to connect to Kudu.')
            : args = parser.parse_args()
main() function?
Minimal modular programing please (e.g. create_shema function like in the c++ example)


http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@89
PS1, Line 89: try:
            :   session.flush()
            : except kudu.KuduBadStatus:
            :   print(session.get_pending_errors())
Why do we prevent this to drop an error?
Should we not stop execution here and return with a non-zero value?
Please explain what is the purpose of this kind of error handling?


http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@124
PS1, Line 124: try:
             :   session.flush()
             : except kudu.KuduBadStatus:
             :   print(session.get_pending_errors())
Why do we continue?


http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@139
PS1, Line 139: op['arr_int64'] = []  # Empty array
nit: Please remove redundant comments like this. You already commented in line 137. And hopefully anyone reading this knows [] is empty array.


http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@144
PS1, Line 144: try:
             :   session.flush()
             : except kudu.KuduBadStatus:
             :   print(session.get_pending_errors())
Same as above?


http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@162
PS1, Line 162: try:
             :   session.flush()
             : except kudu.KuduBadStatus:
             :   print(session.get_pending_errors())
same



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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
Gerrit-PatchSet: 1
Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Reviewer: Zoltan Martonka <zm...@cloudera.com>
Gerrit-Comment-Date: Wed, 15 Oct 2025 08:52:11 +0000
Gerrit-HasComments: Yes

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Marton Greber (Code Review)" <ge...@cloudera.org>.
Marton Greber has removed a vote on this change.

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Removed Verified-1 by Kudu Jenkins (120)
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Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Reviewer: Zoltan Martonka <zm...@cloudera.com>

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Marton Greber (Code Review)" <ge...@cloudera.org>.
Marton Greber has removed a vote on this change.

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Removed Verified-1 by Kudu Jenkins (120)
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Gerrit-Reviewer: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Gabriella Lotz (Code Review)" <ge...@cloudera.org>.
Gabriella Lotz has posted comments on this change. ( http://gerrit.cloudera.org:8080/23531 )

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Patch Set 1:

(6 comments)

http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py
File examples/python/basic-python-example/array_example.py:

http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@30
PS1, Line 30: # Parse arguments
            : parser = argparse.ArgumentParser(description='Array Data Type Example for Kudu Python.')
            : parser.add_argument('--masters', '-m', nargs='+', default='localhost',
            :                     help='The master address(es) to connect to Kudu.')
            : parser.add_argument('--ports', '-p', nargs='+', default='7051',
            :                     help='The master server port(s) to connect to Kudu.')
            : args = parser.parse_args()
> main() function?
Good point! I added modular functions (create_schema(), insert_rows(), scan_rows(), etc.) as 
requested. 

I didn't add a main() function to stay consistent with basic_example.py and 
non_unique_primary_key.py, but happy to add one if you think it's better here.


http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@89
PS1, Line 89: try:
            :   session.flush()
            : except kudu.KuduBadStatus:
            :   print(session.get_pending_errors())
> Why do we prevent this to drop an error?
This error handling pattern is copied from basic_example.py and non_unique_primary_key.py, which also catch KuduBadStatus and print errors without stopping execution.

I changed it to raise the exception so the script fails fast with a clear error. But this pattern is in the other Python examples too, should I update those as well in a separate patch?


http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@124
PS1, Line 124: try:
             :   session.flush()
             : except kudu.KuduBadStatus:
             :   print(session.get_pending_errors())
> Why do we continue?
Done


http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@139
PS1, Line 139: op['arr_int64'] = []  # Empty array
> nit: Please remove redundant comments like this. You already commented in l
Done


http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@144
PS1, Line 144: try:
             :   session.flush()
             : except kudu.KuduBadStatus:
             :   print(session.get_pending_errors())
> Same as above?
Done


http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@162
PS1, Line 162: try:
             :   session.flush()
             : except kudu.KuduBadStatus:
             :   print(session.get_pending_errors())
> same
Done



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Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
Gerrit-PatchSet: 1
Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Reviewer: Zoltan Martonka <zm...@cloudera.com>
Gerrit-Comment-Date: Wed, 15 Oct 2025 12:33:49 +0000
Gerrit-HasComments: Yes

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Zoltan Martonka (Code Review)" <ge...@cloudera.org>.
Zoltan Martonka has posted comments on this change. ( http://gerrit.cloudera.org:8080/23531 )

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Patch Set 3: Code-Review+1

(2 comments)

http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py
File examples/python/basic-python-example/array_example.py:

http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@30
PS1, Line 30:   - A regular INT32 column (int_val)
            :   - Array columns for INT64, STRING, and DOUBLE types
            :   """
            :   builder = kudu.schema_builder()
            :   builder.add_column('key').type(kudu.int32).nullable(False).primary_key()
            :   builder.add_column('int_val', type_=kudu.int32, nullable=False)
            : 
> Good point! I added modular functions (create_schema(), insert_rows(), scan
Its fine this way.


http://gerrit.cloudera.org:8080/#/c/23531/1/examples/python/basic-python-example/array_example.py@89
PS1, Line 89: 
            :   scanner.open()
            :   row_count = 0
            :   while scanner.has_more_rows():
> This error handling pattern is copied from basic_example.py and non_unique_
Thank you.
If you have the time, it would be nice to update the others too.



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Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
Gerrit-PatchSet: 3
Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Reviewer: Zoltan Martonka <zm...@cloudera.com>
Gerrit-Comment-Date: Wed, 15 Oct 2025 16:11:42 +0000
Gerrit-HasComments: Yes

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Kudu Jenkins (Code Review)" <ge...@cloudera.org>.
Kudu Jenkins has posted comments on this change. ( http://gerrit.cloudera.org:8080/23531 )

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Patch Set 1: Verified-1

Build Failed 

http://jenkins.kudu.apache.org/job/pre_commit/1978/ : FAILURE


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Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
Gerrit-PatchSet: 1
Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Comment-Date: Mon, 13 Oct 2025 14:47:10 +0000
Gerrit-HasComments: No

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Gabriella Lotz (Code Review)" <ge...@cloudera.org>.
Hello Marton Greber, Zoltan Martonka, Kudu Jenkins, 

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/23531

to look at the new patch set (#2).

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................

KUDU-3708 Create Python example for array datatype

Add a Python client example demonstrating array data type operations
(insert, scan, update, delete), similar to the C++ example (95abb8d).

The example shows working with arrays containing NULL elements, empty
arrays, and arrays of varying lengths.

Also updated test-python-examples.sh to run the new example in CI
and updated the README to document it.

Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
---
M examples/python/basic-python-example/README.md
A examples/python/basic-python-example/array_example.py
M python/test-python-examples.sh
3 files changed, 238 insertions(+), 4 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/31/23531/2
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Gerrit-Branch: master
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Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
Gerrit-PatchSet: 2
Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Reviewer: Zoltan Martonka <zm...@cloudera.com>

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Marton Greber (Code Review)" <ge...@cloudera.org>.
Marton Greber has posted comments on this change. ( http://gerrit.cloudera.org:8080/23531 )

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Patch Set 1: Verified+1 Code-Review+2

unrelated test failure:
tsan: org.apache.kudu.client.TestKuduClient


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Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
Gerrit-PatchSet: 1
Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Comment-Date: Wed, 15 Oct 2025 07:38:26 +0000
Gerrit-HasComments: No

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Kudu Jenkins (Code Review)" <ge...@cloudera.org>.
Kudu Jenkins has posted comments on this change. ( http://gerrit.cloudera.org:8080/23531 )

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Patch Set 3:

Build Started http://jenkins.kudu.apache.org/job/pre_commit/1992/


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Gerrit-MessageType: comment
Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
Gerrit-PatchSet: 3
Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Reviewer: Zoltan Martonka <zm...@cloudera.com>
Gerrit-Comment-Date: Wed, 15 Oct 2025 15:00:20 +0000
Gerrit-HasComments: No

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Kudu Jenkins (Code Review)" <ge...@cloudera.org>.
Kudu Jenkins has posted comments on this change. ( http://gerrit.cloudera.org:8080/23531 )

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Patch Set 1:

Build Started http://jenkins.kudu.apache.org/job/pre_commit/1978/


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Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
Gerrit-PatchSet: 1
Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Comment-Date: Mon, 13 Oct 2025 13:32:01 +0000
Gerrit-HasComments: No

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Kudu Jenkins (Code Review)" <ge...@cloudera.org>.
Kudu Jenkins has posted comments on this change. ( http://gerrit.cloudera.org:8080/23531 )

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Patch Set 2: Verified-1

Build Failed 

http://jenkins.kudu.apache.org/job/pre_commit/1990/ : FAILURE


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Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
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Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Reviewer: Zoltan Martonka <zm...@cloudera.com>
Gerrit-Comment-Date: Wed, 15 Oct 2025 12:38:03 +0000
Gerrit-HasComments: No

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Kudu Jenkins (Code Review)" <ge...@cloudera.org>.
Kudu Jenkins has posted comments on this change. ( http://gerrit.cloudera.org:8080/23531 )

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Patch Set 2:

Build Started http://jenkins.kudu.apache.org/job/pre_commit/1990/


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Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
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Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Reviewer: Zoltan Martonka <zm...@cloudera.com>
Gerrit-Comment-Date: Wed, 15 Oct 2025 12:33:49 +0000
Gerrit-HasComments: No

[kudu-CR] KUDU-3708 Create Python example for array datatype

Posted by "Marton Greber (Code Review)" <ge...@cloudera.org>.
Marton Greber has posted comments on this change. ( http://gerrit.cloudera.org:8080/23531 )

Change subject: KUDU-3708 Create Python example for array datatype
......................................................................


Patch Set 3: Verified+1 Code-Review+2

unrelated test failure:
release: org.apache.kudu.spark.kudu.DefaultSourceTest
tsan: txn_commit-itest.0, org.apache.kudu.client.TestKuduClient


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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I4a84ee9731efdc802673bb964d358b07648b3fae
Gerrit-Change-Number: 23531
Gerrit-PatchSet: 3
Gerrit-Owner: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Gabriella Lotz <lo...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <gr...@gmail.com>
Gerrit-Reviewer: Zoltan Martonka <zm...@cloudera.com>
Gerrit-Comment-Date: Thu, 16 Oct 2025 08:29:29 +0000
Gerrit-HasComments: No