diff --git a/.github/workflows/main-ci-failure-issue.yml b/.github/workflows/main-ci-failure-issue.yml
index b02ae8c837..9cd7ad4914 100644
--- a/.github/workflows/main-ci-failure-issue.yml
+++ b/.github/workflows/main-ci-failure-issue.yml
@@ -132,7 +132,7 @@ jobs:
           # test pins the equality. There the same annotation class auto-reruns
           # a PR's red check; here it suppresses the per-commit issue.
           # Full rationale → qwen-autofix.md#af-076
-          INFRA_FAILURE_SIGNATURES: 'lost communication with the server|No space left on device|ENOSPC|received a shutdown signal|The runner has received|Failed to initialize container|runner (was|has been) (lost|terminated)|invalid index-pack output|RPC failed|failed to be acquired'
+          INFRA_FAILURE_SIGNATURES: 'lost communication with the server|No space left on device|ENOSPC|received a shutdown signal|The runner has received|Failed to initialize container|runner (was|has been) (lost|terminated)|invalid index-pack output|RPC failed|failed to be acquired|lock not acquired within'
         run: |-
           jobs_json="${RUNNER_TEMP}/run-jobs.json"
 
diff --git a/.github/workflows/qwen-autofix.md b/.github/workflows/qwen-autofix.md
index fe9b1c15b7..12266ce519 100644
--- a/.github/workflows/qwen-autofix.md
+++ b/.github/workflows/qwen-autofix.md
@@ -2355,7 +2355,9 @@ the PR and clears on a re-run (observed: #7490's E2E "runner lost
 communication"; #6506's checkout "RPC failed; curl 92" / "fetch-pack:
 invalid index-pack output" — both green on the rerun; #13622's Classify
 PR, "repeatedly failed to be acquired" — the hosted pool never assigned a
-runner, so zero steps executed). The scan
+runner, so zero steps executed; #14550's SDK Java lane, "sdk-java host
+lock not acquired within 40 minutes" — the per-host test lock starved
+behind cross-run pool traffic and no test ran). The scan
 auto-reruns those failed jobs ONCE, guarded by run_attempt so a persistent
 infra problem cannot loop. Deliberately conservative — only unambiguous
 machine/transport failures, never a bare test-level timeout, which could be
diff --git a/.github/workflows/qwen-autofix.yml b/.github/workflows/qwen-autofix.yml
index 6055d18157..c9eb24947d 100644
--- a/.github/workflows/qwen-autofix.yml
+++ b/.github/workflows/qwen-autofix.yml
@@ -147,10 +147,12 @@ env:
   NON_BLOCKING_CHECKS: '["review-pr"]'
   # Failed-check annotation patterns that mean the INFRASTRUCTURE died, not the
   # code — a self-hosted runner losing the server, the disk filling, a runner
-  # shutdown, a git fetch/clone dying mid-transfer, or the hosted pool never
-  # handing the job a runner (#13622: "repeatedly failed to be acquired").
+  # shutdown, a git fetch/clone dying mid-transfer, the hosted pool never
+  # handing the job a runner (#13622: "repeatedly failed to be acquired"), or a
+  # shared-host test lock starving past its per-acquisition budget (#14550:
+  # "sdk-java host lock not acquired within 40 minutes").
   # Full rationale → qwen-autofix.md#af-076
-  INFRA_FAILURE_SIGNATURES: 'lost communication with the server|No space left on device|ENOSPC|received a shutdown signal|The runner has received|Failed to initialize container|runner (was|has been) (lost|terminated)|invalid index-pack output|RPC failed|failed to be acquired'
+  INFRA_FAILURE_SIGNATURES: 'lost communication with the server|No space left on device|ENOSPC|received a shutdown signal|The runner has received|Failed to initialize container|runner (was|has been) (lost|terminated)|invalid index-pack output|RPC failed|failed to be acquired|lock not acquired within'
   # Upper bound on review targets emitted per scan (fan-out defense-in-depth;
   # excess is logged and deferred to the next scan).
   # Full rationale → qwen-autofix.md#af-077
diff --git a/scripts/tests/main-ci-failure-issue-workflow.test.js b/scripts/tests/main-ci-failure-issue-workflow.test.js
index d2278bd015..ed12c3e51e 100644
--- a/scripts/tests/main-ci-failure-issue-workflow.test.js
+++ b/scripts/tests/main-ci-failure-issue-workflow.test.js
@@ -305,6 +305,11 @@ describe('main CI failure issue workflow', () => {
       expect(infraStep.env.INFRA_FAILURE_SIGNATURES).toContain(
         'lost communication with the server',
       );
+      // A per-host lock starvation (#14550) is the same class: the annotation
+      // names a lock budget, not an assertion.
+      expect(infraStep.env.INFRA_FAILURE_SIGNATURES).toContain(
+        'lock not acquired within',
+      );
     });
 
     it('classifies per failed job and only when EVERY one is infrastructure', () => {
diff --git a/scripts/tests/qwen-autofix-workflow.test.js b/scripts/tests/qwen-autofix-workflow.test.js
index 8db4e29e67..c80575bf68 100644
--- a/scripts/tests/qwen-autofix-workflow.test.js
+++ b/scripts/tests/qwen-autofix-workflow.test.js
@@ -1320,6 +1320,14 @@ describe('qwen-autofix workflow', () => {
           'The self-hosted runner lost communication with the server',
       }),
     ).toEqual({ reran: true, continued: true });
+    // A per-host test lock starving past its budget (#14550) is capacity
+    // contention on the shared pool, not the PR's change: no test ran.
+    expect(
+      run({
+        checks: [FAIL],
+        annotations: 'sdk-java host lock not acquired within 40 minutes',
+      }),
+    ).toEqual({ reran: true, continued: true });
     // A REAL failure (no infra signature in the annotation) → never rerun; the
     // agent/human handles it. This is the gate that stops masking real bugs.
     expect(