Make it neater

Author: HyukjinKwon

.github/workflows/master.yml

@@ -9,6 +9,7 @@ on:
     - master
 
 jobs:
+  # TODO(SPARK-32248): Recover JDK 11 builds
   # Build: build Spark and run the tests for specified modules.
   build:
     name: "Build modules: ${{ matrix.modules }} ${{ matrix.comment }} (JDK ${{ matrix.java }}, ${{ matrix.hadoop }}, ${{ matrix.hive }})"
@@ -22,7 +23,7 @@ jobs:
           - hadoop3.2
         hive:
           - hive2.3
-        # TODO(SPARK-XXXXX): We don't test 'streaming-kinesis-asl' for now.
+        # TODO(SPARK-32246): We don't test 'streaming-kinesis-asl' for now.
         # Kinesis tests depends on external Amazon kinesis service.
         # Note that the modules below are from sparktestsupport/modules.py.
         modules:
@@ -50,20 +51,20 @@ jobs:
         # Here, we split Hive tests into some of heavy ones and the rest of them.
         included-tags: [""]
         excluded-tags: [""]
-        comment: ["- running all tests"]
+        comment: ["- all tests"]
         include:
           - modules: hive
             java: 1.8
             hadoop: hadoop3.2
             hive: hive2.3
             included-tags: org.apache.spark.tags.HeavyHiveTest
-            comment: "- running heavy tests"
+            comment: "- heavy tests"
           - modules: hive
             java: 1.8
             hadoop: hadoop3.2
             hive: hive2.3
             excluded-tags: org.apache.spark.tags.HeavyHiveTest
-            comment: "- running non-heavy tests"
+            comment: "- light tests"
     env:
       TEST_ONLY_MODULES: ${{ matrix.modules }}
       HADOOP_PROFILE: ${{ matrix.hadoop }}
@@ -106,7 +107,8 @@ jobs:
     # PySpark
     - name: Install PyPy3
       # SQL component also has Python related tests, for example, IntegratedUDFTestUtils.
-      # Note that order here matters because default python3 is overridden by pypy3.
+      # Note that order of Python installations here matters because default python3 is
+      # overridden by pypy3.
       uses: actions/setup-python@v2
       if: contains(matrix.modules, 'pyspark') || matrix.modules == 'sql'
       with:
@@ -127,13 +129,12 @@ jobs:
     - name: Install Python packages
       if: contains(matrix.modules, 'pyspark') || matrix.modules == 'sql'
       # PyArrow is not supported in PyPy yet, see ARROW-2651.
-      # scipy installation with PyPy fails for an unknown reason.
+      # TODO(SPARK-32247): scipy installation with PyPy fails for an unknown reason.
       run: |
         python3 -m pip install numpy pyarrow pandas scipy
         python3 -m pip list
         python2 -m pip install numpy pyarrow pandas scipy
         python2 -m pip list
-        # Installing NumPy is flaky in PyPy.
         pypy3 -m pip install numpy pandas
         pypy3 -m pip list
     # SparkR

core/src/test/scala/org/apache/spark/deploy/master/MasterSuite.scala

@@ -685,6 +685,7 @@ class MasterSuite extends SparkFunSuite
     }
   }
 
+  // TODO(SPARK-32250): Enable the test back. It is flaky in GitHub Actions.
   ignore("SPARK-27510: Master should avoid dead loop while launching executor failed in Worker") {
     val master = makeAliveMaster()
     var worker: MockExecutorLaunchFailWorker = null

dev/run-tests.py

@@ -702,7 +702,7 @@ def main():
 
 def _test():
     if "TEST_ONLY_MODULES" in os.environ:
-        # Do not do anything except testing the targeted modules.
+        # TODO(SPARK-32252): Enable doctests back in Github Actions.
         return
 
     import doctest