diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 19659f2d79..ec7d32d868 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -35,4 +35,4 @@ jobs:
       - uses: actions/setup-java@v1
         with:
           java-version: ${{ matrix.java-version }}
-      - run: mvn clean install -DskipTests -Dmaven.javadoc.skip=true
+      - run: mvn clean install -T2C -DskipTests -Dmaven.javadoc.skip=true
diff --git a/build-tools/test-patch.sh b/build-tools/test-patch.sh
index 9b457af221..77e6884a78 100755
--- a/build-tools/test-patch.sh
+++ b/build-tools/test-patch.sh
@@ -252,8 +252,8 @@ prebuildWithoutPatch () {
   echo ""
   echo ""
   echo "Compiling $(pwd)"
-  echo "$MVN clean test -DskipTests -Ptest-patch > $PATCH_DIR/masterJavacWarnings.txt 2>&1"
-  $MVN clean test -DskipTests -Ptest-patch > $PATCH_DIR/masterJavacWarnings.txt 2>&1
+  echo "$MVN clean -T2C test -DskipTests -Ptest-patch > $PATCH_DIR/masterJavacWarnings.txt 2>&1"
+  $MVN clean -T2C test -DskipTests -Ptest-patch > $PATCH_DIR/masterJavacWarnings.txt 2>&1
   if [[ $? != 0 ]] ; then
     echo "master compilation is broken?"
     JIRA_COMMENT="$JIRA_COMMENT
@@ -518,8 +518,8 @@ buildAndInstall () {
   echo "======================================================================"
   echo ""
   echo ""
-  echo "$MVN install -Dmaven.javadoc.skip=true -DskipTests -D${PROJECT_NAME}PatchProcess"
-  $MVN install -Dmaven.javadoc.skip=true -DskipTests -D${PROJECT_NAME}PatchProcess
+  echo "$MVN install -T2C -Dmaven.javadoc.skip=true -DskipTests -D${PROJECT_NAME}PatchProcess"
+  $MVN install -T2C -Dmaven.javadoc.skip=true -DskipTests -D${PROJECT_NAME}PatchProcess
   return $?
 }
 
diff --git a/tez-dag/src/main/java/org/apache/tez/dag/app/DAGAppMaster.java b/tez-dag/src/main/java/org/apache/tez/dag/app/DAGAppMaster.java
index 263ac76b4c..1e5a8ae940 100644
--- a/tez-dag/src/main/java/org/apache/tez/dag/app/DAGAppMaster.java
+++ b/tez-dag/src/main/java/org/apache/tez/dag/app/DAGAppMaster.java
@@ -1762,6 +1762,7 @@ public void stateChanged(Service dependency) {
       Throwable dependencyError = dependency.getFailureCause();
       if (dependencyError != null) {
         synchronized(this) {
+          // test
           dependenciesFailed = true;
           if(LOG.isDebugEnabled()) {
             LOG.debug("Service: " + service.getName() + " will fail to start"