Will this NPE make Spark 4.2 completely unusable? If not, dependency upgrades 
theoretically should not be backported to the 4.2.x branch, as third-party 
dependencies for the entire 4.x line have been frozen, correct?

Jie Yang

On 2026/06/30 02:35:43 huaxin gao wrote:
> Thanks Cheng for flagging this!
> 
> I prefer not to delay RC5 (which is for the WKB security fix) just to wait
> for an outside dependency. Also, 2.26.1 just started voting, so we can't
> use it until it is on Maven Central (about 4-5 days). So I will cut RC5
> with the current log4j. If RC5 fails, we can include 2.26.1, otherwise
> let's include it in 4.2.1.
> 
> Thanks,
> 
> Huaxin
> 
> On Mon, Jun 29, 2026 at 6:57 PM Cheng Pan <[email protected]> wrote:
> 
> > Can we include the log4j 2.26.1 upgrading in next RC?
> >
> > TL:DR, the current log4j2 2.25.x used by branch-4.2 may throw NPE on
> > logging, downgrading to 2.24.x can fix the issue but bring some CVEs back,
> > log4j2 2.26.1 is in the voting phase and likely available soon. See full
> > context at [1]
> >
> > [1] https://github.com/apache/spark/pull/51719#issuecomment-3341344974
> >
> > Thanks,
> > Cheng Pan
> >
> >
> >
> > On Jun 30, 2026, at 08:52, huaxin gao <[email protected]> wrote:
> >
> > Thanks Szehon for reporting the problem. I'm failing RC4, and will roll
> > RC5 once the fix <https://github.com/apache/spark/pull/56875> is merged
> > and backported to branch-4.2.
> >
> > Thanks to everyone who tested RC4!
> >
> > Huaxin
> >
> > On Mon, Jun 29, 2026 at 5:14 PM Szehon Ho <[email protected]> wrote:
> >
> >> I made a fix for this, it would be great to get it into the release.
> >>
> >> https://github.com/apache/spark/pull/56875
> >>
> >> Thanks Huaxin!
> >> Szehon
> >>
> >>
> >> On Mon, Jun 29, 2026 at 4:54 PM Szehon Ho <[email protected]>
> >> wrote:
> >>
> >>> Sorry I was informed of a potential vulnerability/problem in new fromWKB
> >>> in Spark 4.2, looking now at it.
> >>>
> >>> Thanks
> >>> Szehon
> >>>
> >>> On Mon, Jun 29, 2026 at 1:05 PM Allison Wang <[email protected]>
> >>> wrote:
> >>>
> >>>> +1
> >>>>
> >>>> On Mon, Jun 29, 2026 at 10:34 AM Max Gekk <[email protected]> wrote:
> >>>>
> >>>>> +1
> >>>>>
> >>>>> On Mon, Jun 29, 2026 at 6:32 PM Xiao Li <[email protected]> wrote:
> >>>>> >
> >>>>> > +1 (binding)
> >>>>> >
> >>>>> > Verified on Linux (Ubuntu, JDK 17, Python 3.11):
> >>>>> >
> >>>>> > - Signatures: every artifact (source, the three binary
> >>>>> distributions, the pyspark/pyspark_client/pyspark_connect tarballs, and
> >>>>> SparkR) has a good GPG signature from the RM key
> >>>>> 709226B910E0F10917123B6259B586ADA5A538D1, which is in KEYS.
> >>>>> > - Checksums: SHA512 matches for all artifacts.- Tag/commit:
> >>>>> v4.2.0-rc4 resolves to f92a807c06b, and the RELEASE metadata embedded in
> >>>>> the binary distributions records the same git revision.
> >>>>> > - Source build: compiled and packaged spark-core and its module
> >>>>> dependencies from the source tarball with ./build/mvn on JDK 17 (BUILD
> >>>>> SUCCESS).
> >>>>> > - Binary distribution: ran SparkPi and a spark-shell Scala job
> >>>>> (range aggregation + Spark SQL) — results correct.
> >>>>> > - PySpark: pip-installed pyspark-4.2.0.tar.gz and ran DataFrame,
> >>>>> Spark SQL, and a Python UDF in local mode — results correct.
> >>>>> >
> >>>>> > Thanks Huaxin for driving the release!
> >>>>> >
> >>>>> > Xiao
> >>>>> >
> >>>>> > Uroš Bojanić <[email protected]> 于2026年6月29日周一 09:12写道:
> >>>>> >>
> >>>>> >> +1 (non-binding)
> >>>>> >>
> >>>>> >> verified RC4 (tag v4.2.0-rc4, commit f92a807c06b) on macOS/arm64.
> >>>>> >>
> >>>>> >> - Good GPG signatures and SHA512 sums on all artifacts (source,
> >>>>> three binaries, the PySpark/SparkR tarballs) against KEYS.
> >>>>> >> - Built the full source tree from the tag with -Phive
> >>>>> -Phive-thriftserver, got a clean BUILD SUCCESS across all 39 modules.
> >>>>> >> - Ran quick smoke tests across every API surface: Java, Scala, SQL,
> >>>>> and PySpark job from the bundled distro; all look good.
> >>>>> >> - Sanity-checked the binary dist (RELEASE, LICENSE/NOTICE/licenses
> >>>>> all present) and ran dev/check-license; RAT passes.
> >>>>> >> - Diffed the docs against 4.1.0 and analyzed the changes (new
> >>>>> pages, migration guides and version refs); all look good.
> >>>>> >>
> >>>>> >> Thank you Huaxin Gao!
> >>>>> >>
> >>>>> >> On 2026/06/27 00:21:32 [email protected] wrote:
> >>>>> >> > Please vote on releasing the following candidate as Apache Spark
> >>>>> version 4.2.0.
> >>>>> >> >
> >>>>> >> > The vote is open until Mon, 29 Jun 2026 18:21:31 PDT and passes
> >>>>> if a majority +1 PMC votes are cast, with
> >>>>> >> > a minimum of 3 +1 votes.
> >>>>> >> >
> >>>>> >> > [ ] +1 Release this package as Apache Spark 4.2.0
> >>>>> >> > [ ] -1 Do not release this package because ...
> >>>>> >> >
> >>>>> >> > To learn more about Apache Spark, please see
> >>>>> https://spark.apache.org/
> >>>>> >> >
> >>>>> >> > The tag to be voted on is v4.2.0-rc4 (commit f92a807c06b):
> >>>>> >> > https://github.com/apache/spark/tree/v4.2.0-rc4
> >>>>> >> >
> >>>>> >> > The release files, including signatures, digests, etc. can be
> >>>>> found at:
> >>>>> >> > https://dist.apache.org/repos/dist/dev/spark/v4.2.0-rc4-bin/
> >>>>> >> >
> >>>>> >> > Signatures used for Spark RCs can be found in this file:
> >>>>> >> > https://downloads.apache.org/spark/KEYS
> >>>>> >> >
> >>>>> >> > The staging repository for this release can be found at:
> >>>>> >> >
> >>>>> https://repository.apache.org/content/repositories/orgapachespark-1524/
> >>>>> >> >
> >>>>> >> > The documentation corresponding to this release can be found at:
> >>>>> >> > https://dist.apache.org/repos/dist/dev/spark/v4.2.0-rc4-docs/
> >>>>> >> >
> >>>>> >> > The list of bug fixes going into 4.2.0 can be found at the
> >>>>> following URL:
> >>>>> >> > https://issues.apache.org/jira/projects/SPARK/versions/12356380
> >>>>> >> >
> >>>>> >> > FAQ
> >>>>> >> >
> >>>>> >> > =========================
> >>>>> >> > How can I help test this release?
> >>>>> >> > =========================
> >>>>> >> >
> >>>>> >> > If you are a Spark user, you can help us test this release by
> >>>>> taking
> >>>>> >> > an existing Spark workload and running on this release candidate,
> >>>>> then
> >>>>> >> > reporting any regressions.
> >>>>> >> >
> >>>>> >> > If you're working in PySpark you can set up a virtual env and
> >>>>> install
> >>>>> >> > the current RC via "pip install
> >>>>> https://dist.apache.org/repos/dist/dev/spark/v4.2.0-rc4-bin/pyspark-4.2.0.tar.gz
> >>>>> "
> >>>>> >> > and see if anything important breaks.
> >>>>> >> > In the Java/Scala, you can add the staging repository to your
> >>>>> project's resolvers and test
> >>>>> >> > with the RC (make sure to clean up the artifact cache
> >>>>> before/after so
> >>>>> >> > you don't end up building with an out of date RC going forward).
> >>>>> >> >
> >>>>> >> >
> >>>>> ---------------------------------------------------------------------
> >>>>> >> > To unsubscribe e-mail: [email protected]
> >>>>> >> >
> >>>>> >> >
> >>>>> >>
> >>>>> >>
> >>>>> ---------------------------------------------------------------------
> >>>>> >> To unsubscribe e-mail: [email protected]
> >>>>> >>
> >>>>>
> >>>>> ---------------------------------------------------------------------
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> >>>>>
> >>>>>
> >
> 

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