thread dump on github actions cancellation

Author: hmottestad

.github/workflows/develop-status.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Build
       run: mvn -B -U clean install -Pquick,\!formatting
     - name: Verify
-      run: mvn -B install -P-skipSlowTests -Dmaven.javadoc.skip=true
+      run: ./scripts/ci/run-with-thread-dump.sh mvn -B install -P-skipSlowTests -Dmaven.javadoc.skip=true
     - name: Publish Test Report
       if: failure()
       uses: scacap/action-surefire-report@v1

.github/workflows/main-status.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Build
       run: mvn -B -U -T 2C clean install -DskipTests
     - name: Run all tests
-      run: mvn -B install -P-skipSlowTests -Dmaven.javadoc.skip=true
+      run: ./scripts/ci/run-with-thread-dump.sh mvn -B install -P-skipSlowTests -Dmaven.javadoc.skip=true
     - name: Publish Test Report
       if: failure()
       uses: scacap/action-surefire-report@v1

.github/workflows/pr-verify.yml

@@ -62,7 +62,7 @@ jobs:
       - name: Build
         run: mvn --quiet clean && mvn -B --quiet -T 2C install -Pquick
       - name: Test
-        run: mvn -B test -DskipITs -P-formatting -Dmaven.javadoc.skip -Djapicmp.skip -Denforcer.skip -Danimal.sniffer.skip
+        run: ./scripts/ci/run-with-thread-dump.sh mvn -B test -DskipITs -P-formatting -Dmaven.javadoc.skip -Djapicmp.skip -Denforcer.skip -Danimal.sniffer.skip
       - name: Publish Test Report
         if: failure()
         uses: scacap/action-surefire-report@v1.9.0
@@ -84,7 +84,7 @@ jobs:
       - name: Build
         run: mvn --quiet clean && mvn -B --quiet -T 2C install -Pquick
       - name: Verify
-        run: mvn -B verify -PskipUnitTests,-formatting -Dmaven.javadoc.skip -Denforcer.skip -Danimal.sniffer.skip
+        run: ./scripts/ci/run-with-thread-dump.sh mvn -B verify -PskipUnitTests,-formatting -Dmaven.javadoc.skip -Denforcer.skip -Danimal.sniffer.skip
       - name: Publish Test Report
         if: failure()
         uses: scacap/action-surefire-report@v1.9.0
@@ -105,7 +105,7 @@ jobs:
       - name: Build
         run: mvn --quiet clean && mvn -B --quiet -T 2C install -Pquick
       - name: Verify
-        run: mvn -B verify -PslowTestsOnly,-skipSlowTests,-formatting -Dmaven.javadoc.skip -Djapicmp.skip -Denforcer.skip -Danimal.sniffer.skip
+        run: ./scripts/ci/run-with-thread-dump.sh mvn -B verify -PslowTestsOnly,-skipSlowTests,-formatting -Dmaven.javadoc.skip -Djapicmp.skip -Denforcer.skip -Danimal.sniffer.skip
       - name: Publish Test Report
         if: failure()
         uses: scacap/action-surefire-report@v1.9.0
@@ -148,12 +148,11 @@ jobs:
           node-version: 18
       - name: Run end-to-end tests of RDF4J Server and Workbench
         working-directory: ./e2e
-        run: ./run.sh
+        run: ../scripts/ci/run-with-thread-dump.sh ./run.sh
 
   copyright-check:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - name: check copyright header present
         run: scripts/checkCopyrightPresent.sh
-

scripts/ci/run-with-thread-dump.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+dump_threads() {
+  echo "== Cancellation received: capturing JVM thread dumps =="
+  local pids
+  pids=$(pgrep -f '[j]ava' || true)
+  if [[ -z "${pids}" ]]; then
+    echo "No Java processes found."
+    return 0
+  fi
+
+  if command -v jcmd >/dev/null 2>&1; then
+    for pid in ${pids}; do
+      echo "-- jcmd Thread.print for PID ${pid} --"
+      jcmd "${pid}" Thread.print || true
+    done
+    return 0
+  fi
+
+  if command -v jstack >/dev/null 2>&1; then
+    for pid in ${pids}; do
+      echo "-- jstack for PID ${pid} --"
+      jstack "${pid}" || true
+    done
+    return 0
+  fi
+
+  for pid in ${pids}; do
+    echo "-- kill -QUIT ${pid} (no jcmd/jstack available) --"
+    kill -QUIT "${pid}" || true
+  done
+}
+
+on_term() {
+  dump_threads
+  if [[ -n "${child_pid:-}" ]]; then
+    kill -TERM "${child_pid}" 2>/dev/null || true
+  fi
+}
+
+if [[ $# -eq 0 ]]; then
+  echo "Usage: $0 <command> [args...]" >&2
+  exit 2
+fi
+
+trap on_term INT TERM
+
+"$@" &
+child_pid=$!
+
+wait "${child_pid}"
+status=$?
+
+trap - INT TERM
+exit "${status}"