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jungm pushed a commit to branch ee11
in repository https://gitbox.apache.org/repos/asf/tomee-tck.git

commit 08167d763f8d676479dafe28b402a8358948d2d3
Author: Markus Jung <[email protected]>
AuthorDate: Sun Jul 19 16:40:51 2026 +0200

    Describe the containerized CI branches in the docs
---
 KNOWN_ISSUES.md | 21 +++++++++++++--------
 README.md       | 33 ++++++++++++++++++---------------
 2 files changed, 31 insertions(+), 23 deletions(-)

diff --git a/KNOWN_ISSUES.md b/KNOWN_ISSUES.md
index 1473cea..75b5d90 100644
--- a/KNOWN_ISSUES.md
+++ b/KNOWN_ISSUES.md
@@ -275,11 +275,16 @@ JavaTest report directories (`security-old` and 
`faces-old` write theirs to
 `target/securityreport/**` and `target/facesreport/**`, matched by the
 `target/*report/**` archive glob).
 
-The modern `faces` branch runs its suite inside a container that bundles JDK 
21,
-Maven, and a matching Chrome/chromedriver pair
-(`markhobson/maven-chrome:jdk-21`, pinned by digest in the `Jenkinsfile`),
-because its `old-tck-selenium` modules drive a real Chrome through Selenium and
-the ASF `ubuntu && ephemeral` agents ship no browser binary. The container runs
-with `--shm-size=2g` so headless Chrome has enough shared memory. The
-`faces-old` JavaTest half needs no browser and runs on the bare JDK-tools agent
-like the other suites.
+Every test branch runs its suite inside a container pinned by digest in the
+`Jenkinsfile`, so each TomEE/Derby/LDAP/JavaTest port binds a
+container-private network namespace and cannot collide with anything else on
+the host. Most branches use a plain `eclipse-temurin` JDK image (the smoke
+matrix pairs a JDK 17 and a JDK 21 image; everything else uses JDK 21) — the
+checked-in Maven wrapper bootstraps Maven inside the container. The modern
+`faces` branch instead uses a container that bundles JDK 21, Maven, and a
+matching Chrome/chromedriver pair (`markhobson/maven-chrome:jdk-21`), because
+its `old-tck-selenium` modules drive a real Chrome through Selenium and the
+ASF `ubuntu && ephemeral` agents ship no browser binary; it runs with
+`--shm-size=2g` so headless Chrome has enough shared memory. The `faces-old`
+JavaTest half needs no browser and uses the plain JDK 21 image like the other
+suites.
diff --git a/README.md b/README.md
index 757bb0a..2ac80c4 100644
--- a/README.md
+++ b/README.md
@@ -78,22 +78,25 @@ TOMEE_CLASSIFIER=webprofile 
runner-webprofile/run-platform-suite.sh javatest per
 ## ASF Jenkins pipeline
 
 The root `Jenkinsfile` is the authoritative CI definition. It targets the ASF
-Jenkins `ubuntu` agents and their managed `jdk_17_latest` and `jdk_21_latest`
-tools. The pipeline validates the environment, runs the smoke gate on both
-JDKs in parallel, and then fans out every manifest partition as an independent
-JDK 21 branch against the default TomEE Plume distribution. One additional
-branch runs the Jakarta Persistence javatest partition against the
-OpenJPA-based webprofile distribution to track its reviewed exclusion list.
-Test reports and TomEE logs are archived for 14 days.
-
-Parallel branches request `ubuntu && ephemeral` agents. The current ASF cloud
-workers advertise one executor per host, which isolates the fixed localhost
-ports used by TomEE and Derby. Jenkins queues branches when fewer workers are
-available, so the pipeline uses available capacity without imposing a fixed
-partition count.
+Jenkins `ubuntu` agents. The pipeline validates the environment, runs the
+smoke gate on JDK 17 and JDK 21 in parallel, and then fans out every manifest
+partition as an independent JDK 21 branch against the default TomEE Plume
+distribution. One additional branch runs the Jakarta Persistence javatest
+partition against the OpenJPA-based webprofile distribution to track its
+reviewed exclusion list. Test reports and TomEE logs are archived for 14 days.
+
+Parallel branches request `ubuntu && ephemeral` agents and run their suites
+inside digest-pinned containers (`eclipse-temurin` JDK images; a
+Chrome-bundling image for the modern `faces` suite), so every TomEE, Derby,
+LDAP and JavaTest port binds a container-private network namespace and cannot
+collide with other jobs on the same host. The runner scripts' free-port
+selection and require-free guards remain as defense in depth and for
+workstation runs outside a container. Jenkins queues branches when fewer
+workers are available, so the pipeline uses available capacity without
+imposing a fixed partition count.
 Configure an ASF Jenkins multibranch Pipeline job to use `Jenkinsfile` from
-SCM; Jenkins supplies the checkout and managed JDKs, while the checked-in Maven
-wrapper supplies Maven 3.9.9.
+SCM; Jenkins supplies the checkout, the container images supply the JDKs, and
+the checked-in Maven wrapper supplies Maven 3.9.9 inside each container.
 
 See `runner-webprofile/README.md` for the available artifact profiles and the
 coverage gaps that remain before this can produce a certification result.

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