TEZ-4758: Add a buf configuration so Yetus bufcompat/buflint can run

[deniskuzZ]

Yetus runs buf at the repository root with no config, so every cross-file import ("imported file does not exist" for import "DAGApiRecords.proto") fails and bufcompat votes -1 on the base branch before a patch is even applied. TEZ-4548 was the last proto change and predates the check; TEZ-4757 is the first patch to hit it

[tez-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	14m 6s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ master Compile Tests _
+1 💚	mvninstall	6m 17s		master passed
+1 💚	compile	4m 39s		master passed
-1 ❌	bufcompat	0m 2s	/branch-bufcompat-stderr.txt	Error running buf. Please check buf stderr files.
			_ Patch Compile Tests _
+1 💚	mvninstall	4m 56s		the patch passed
+1 💚	codespell	2m 16s		No new issues.
+1 💚	compile	4m 34s		the patch passed
+1 💚	blanks	0m 1s		The patch has no blanks issues.
+1 💚	buflint	0m 6s		The patch generated 0 new + 0 unchanged - 28 fixed = 0 total (was 28)
-1 ❌	yamllint	0m 0s	/results-yamllint.txt	The patch generated 8 new + 0 unchanged - 0 fixed = 8 total (was 0)
			_ Other Tests _
-1 ❌	unit	78m 1s	/patch-unit-root.txt	root in the patch passed.
-1 ❌	asflicense	0m 59s	/results-asflicense.txt	The patch generated 1 ASF License warnings.
		117m 30s

Reason	Tests
Failed junit tests	tez.dag.app.TestSpeculation

Subsystem	Report/Notes
Docker	ClientAPI=1.56 ServerAPI=1.56 base: https://ci-hadoop.apache.org/job/tez-multibranch/job/PR-542/2/artifact/out/Dockerfile
Optional Tests	dupname compile unit asflicense buflint bufcompat codespell detsecrets yamllint
uname	Linux f259f2896d89 5.15.0-185-generic #195-Ubuntu SMP Fri Jun 19 17:11:50 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	tez-personality.sh
git revision	master / 0e9f756
Test Results	https://ci-hadoop.apache.org/job/tez-multibranch/job/PR-542/2/testReport/
Max. process+thread count	1358 (vs. ulimit of 5500)
modules	C: . U: .
Console output	https://ci-hadoop.apache.org/job/tez-multibranch/job/PR-542/2/console
versions	git=2.43.0 maven=3.9.15 buf=1.68.2 codespell=2.4.1 yamllint=1.38.0
Powered by	Apache Yetus 0.15.1 https://yetus.apache.org

This message was automatically generated.

[tez-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	10m 51s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ master Compile Tests _
+1 💚	mvninstall	4m 59s		master passed
+1 💚	compile	3m 58s		master passed
-1 ❌	bufcompat	0m 2s	/branch-bufcompat-stderr.txt	Error running buf. Please check buf stderr files.
			_ Patch Compile Tests _
+1 💚	mvninstall	4m 7s		the patch passed
+1 💚	codespell	1m 47s		No new issues.
+1 💚	compile	3m 57s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	buflint	0m 6s		The patch generated 0 new + 0 unchanged - 28 fixed = 0 total (was 28)
+1 💚	yamllint	0m 0s		No new issues.
			_ Other Tests _
-1 ❌	unit	72m 57s	/patch-unit-root.txt	root in the patch passed.
+1 💚	asflicense	0m 57s		The patch does not generate ASF License warnings.
		105m 9s

Reason	Tests
Failed junit tests	tez.history.TestHistoryParser

Subsystem	Report/Notes
Docker	ClientAPI=1.56 ServerAPI=1.56 base: https://ci-hadoop.apache.org/job/tez-multibranch/job/PR-542/3/artifact/out/Dockerfile
Optional Tests	dupname compile unit asflicense buflint bufcompat codespell detsecrets yamllint
uname	Linux b6375bd02cd4 5.15.0-191-generic #201-Ubuntu SMP Fri Aug 7 18:39:04 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	tez-personality.sh
git revision	master / 0e9f756
Test Results	https://ci-hadoop.apache.org/job/tez-multibranch/job/PR-542/3/testReport/
Max. process+thread count	1392 (vs. ulimit of 5500)
modules	C: . U: .
Console output	https://ci-hadoop.apache.org/job/tez-multibranch/job/PR-542/3/console
versions	git=2.43.0 maven=3.9.15 buf=1.68.2 codespell=2.4.1 yamllint=1.38.0
Powered by	Apache Yetus 0.15.1 https://yetus.apache.org

This message was automatically generated.

[deniskuzZ]

The bufcompat -1 is structural for this PR and cannot go green here. Yetus's bufcompat_preapply runs buf build on the unpatched base branch before the patch is applied; master has no buf.yaml, so every cross-file import fails (imported file does not exist for import "DAGApiRecords.proto", a same-directory import) and the plugin votes -1 before this change is even considered.
it needs to be merged over the vote once, after which the branch side builds and bufcompat runs for real on every later PR.

The check that does run on the patched tree is buflint, and it went from 28 errors to 0 on this PR — that's the config working.

Verified locally with buf 1.73 (CI runs 1.68.2): buf build and buf lint clean on master;

The unit failures are unrelated to a YAML file.

[abstractdog]

The bufcompat -1 is structural for this PR and cannot go green here. Yetus's bufcompat_preapply runs buf build on the unpatched base branch before the patch is applied; master has no buf.yaml, so every cross-file import fails (imported file does not exist for import "DAGApiRecords.proto", a same-directory import) and the plugin votes -1 before this change is even considered. it needs to be merged over the vote once, after which the branch side builds and bufcompat runs for real on every later PR.

The check that does run on the patched tree is buflint, and it went from 28 errors to 0 on this PR — that's the config working.

Verified locally with buf 1.73 (CI runs 1.68.2): buf build and buf lint clean on master;

The unit failures are unrelated to a YAML file.

makes sense, ack

[abstractdog]

TestHistoryParser flakiness is not related, so this LGTM