+1 (non-binding).

Regards,
Rishab Joshi

On Wed, Mar 18, 2026, 4:47 PM Jungtaek Lim <[email protected]>
wrote:

> +1 (non-binding)
>
> Looking forward to having this!
>
> On Thu, Mar 19, 2026 at 7:07 AM vaquar khan <[email protected]> wrote:
>
>> +1
>>
>> On Wed, Mar 18, 2026, 4:53 PM Hyukjin Kwon <[email protected]> wrote:
>>
>>> +1
>>>
>>> On Thu, 19 Mar 2026 at 06:42, Szehon Ho <[email protected]> wrote:
>>>
>>>> +1 (non binding)
>>>>
>>>> Thanks
>>>> Szehon
>>>>
>>>> On Wed, Mar 18, 2026 at 2:17 PM Yicong Huang <[email protected]>
>>>> wrote:
>>>>
>>>>> +1 (non-binding)
>>>>>
>>>>>
>>>>> On Wed, Mar 18, 2026 at 1:49 PM DB Tsai <[email protected]> wrote:
>>>>>
>>>>>> +1
>>>>>>
>>>>>> DB Tsai  |  https://www.dbtsai.com/  |  PGP 42E5B25A8F7A82C1
>>>>>>
>>>>>> On Mar 18, 2026, at 12:24 PM, Chao Sun <[email protected]> wrote:
>>>>>>
>>>>>> +1 (binding)
>>>>>>
>>>>>> On Wed, Mar 18, 2026 at 12:00 PM Herman van Hovell via dev <
>>>>>> [email protected]> wrote:
>>>>>>
>>>>>>> +1
>>>>>>>
>>>>>>> On Wed, Mar 18, 2026 at 2:57 PM Daniel Tenedorio <
>>>>>>> [email protected]> wrote:
>>>>>>>
>>>>>>>> +1 (non-binding)
>>>>>>>>
>>>>>>>> Thank you for your persistence working on this proposal and
>>>>>>>> figuring out the details.
>>>>>>>>
>>>>>>>> On 2026/03/18 09:32:40 Haiyang Sun via dev wrote:
>>>>>>>> > Hi Spark devs,
>>>>>>>> >
>>>>>>>> > I would like to call for *a new vote following the previous
>>>>>>>> attempt* for the
>>>>>>>> > *SPIP: Language-Agnostic UDF Execution Protocol for Spark *after
>>>>>>>> addressing
>>>>>>>> > comments and providing a supplementary design document for worker
>>>>>>>> > specification.
>>>>>>>> >
>>>>>>>> > The SPIP proposes a structured, language-agnostic framework for
>>>>>>>> running
>>>>>>>> > user-defined functions (UDFs) in Spark across multiple
>>>>>>>> programming languages
>>>>>>>> >
>>>>>>>> > Today, Spark Connect allows users to write queries from multiple
>>>>>>>> languages,
>>>>>>>> > but support for user-defined functions remains incomplete. In
>>>>>>>> practice,
>>>>>>>> > only Scala, Java, Python have working support, and this relies on
>>>>>>>> > language-specific mechanisms that do not generalize well to other
>>>>>>>> languages
>>>>>>>> > such as Go <https://github.com/apache/spark-connect-go> / Rust
>>>>>>>> > <https://github.com/apache/spark-connect-rust> / Swift
>>>>>>>> > <https://github.com/apache/spark-connect-swift> / TypeScript
>>>>>>>> > <https://github.com/BaldrVivaldelli/ts-spark-connector>  where
>>>>>>>> UDF support
>>>>>>>> > is currently unavailable. In addition, there are legacy
>>>>>>>> limitations in the
>>>>>>>> > existing PySpark worker implementation that make it difficult to
>>>>>>>> evolve the
>>>>>>>> > system or extend it to new languages.
>>>>>>>> >
>>>>>>>> > The proposal introduces two related components:
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >    1.
>>>>>>>> >
>>>>>>>> >    *A unified UDF execution protocol*
>>>>>>>> >
>>>>>>>> >    The proposal defines a structured API and execution protocol
>>>>>>>> for running
>>>>>>>> >    UDFs outside the Spark executor process and communicating with
>>>>>>>> Spark via
>>>>>>>> >    inter-process communication (IPC). This protocol enables Spark
>>>>>>>> to interact
>>>>>>>> >    with external UDF workers in a consistent and extensible way,
>>>>>>>> regardless of
>>>>>>>> >    the implementation language.
>>>>>>>> >    2.
>>>>>>>> >
>>>>>>>> >    *A worker specification for provisioning and lifecycle
>>>>>>>> management.*
>>>>>>>> >
>>>>>>>> >    To support multi-language execution environments, the proposal
>>>>>>>> also
>>>>>>>> >    introduces a worker specification describing how UDF workers
>>>>>>>> can be
>>>>>>>> >    installed, started, connected to, and terminated. This
>>>>>>>> document complements
>>>>>>>> >    the SPIP by outlining how workers can be provisioned and
>>>>>>>> managed in a
>>>>>>>> >    consistent way.
>>>>>>>> >
>>>>>>>> > Note that this SPIP can help enable UDF support for languages that
>>>>>>>> > currently do not support UDFs. For languages that already have UDF
>>>>>>>> > implementations (especially Python), the goal is not to replace
>>>>>>>> existing
>>>>>>>> > implementations immediately, but to provide a framework that may
>>>>>>>> allow them
>>>>>>>> > to gradually evolve toward more language-agnostic abstractions
>>>>>>>> over time.
>>>>>>>> >
>>>>>>>> > More details can be found in the SPIP document and the
>>>>>>>> supplementary design
>>>>>>>> > for worker specification:
>>>>>>>> >
>>>>>>>> > SPIP:
>>>>>>>> >
>>>>>>>> https://docs.google.com/document/d/19Whzq127QxVt2Luk0EClgaDtcpBsFUp67NcVdKKyPF8
>>>>>>>> >
>>>>>>>> > Worker specification design document:
>>>>>>>> >
>>>>>>>> https://docs.google.com/document/d/1Dx9NqHRNuUpatH9DYoFF9cmvUl2fqHT4Rjbyw4EGLHs
>>>>>>>> >
>>>>>>>> > Discussion Thread:
>>>>>>>> > https://lists.apache.org/thread/9t4svsnd71j7sb4r4scf2xhh8dvp3b43
>>>>>>>> >
>>>>>>>> > Previous vote and discussion thread:
>>>>>>>> > https://lists.apache.org/thread/81xghrfwvopp274rgyxfthsstb2xmkz1
>>>>>>>> >
>>>>>>>> > *Please vote on adopting this proposal.*
>>>>>>>> >
>>>>>>>> > [ ] +1: Accept the proposal as an official SPIP
>>>>>>>> >
>>>>>>>> > [ ] +0: No opinion
>>>>>>>> >
>>>>>>>> > [ ] -1: Disapprove (please explain why)
>>>>>>>> >
>>>>>>>> > The vote will remain open for *at least 72 hours. *
>>>>>>>> >
>>>>>>>> > Thanks to everyone who participated in the discussion and
>>>>>>>> provided valuable
>>>>>>>> > feedback!
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > Best regards,
>>>>>>>> >
>>>>>>>> > Haiyang
>>>>>>>> >
>>>>>>>>
>>>>>>>>
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>>>>>>>>
>>>>>>>>
>>>>>>

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