SPARK-9545, SPARK-9547: Use Maven in PRB if title contains "[test-maven]"

This is just some small glue code to actually make use of the
AMPLAB_JENKINS_BUILD_TOOL switch. As far as I can tell, we actually
don't currently use the Maven support in the tool even though it exists.
This patch switches to Maven when the PR title contains "test-maven".

There are a few small other pieces of cleanup in the patch as well.

Author: Patrick Wendell <patrick@databricks.com>

Closes #7878 from pwendell/maven-tests.

dev/run-tests-jenkins

@@ -164,8 +164,9 @@ pr_message=""
 current_pr_head="`git rev-parse HEAD`"
 
 echo "HEAD:  `git rev-parse HEAD`"
-echo "GHPRB: $ghprbActualCommit"
-echo "SHA1:  $sha1"
+echo "\$ghprbActualCommit: $ghprbActualCommit"
+echo "\$sha1:  $sha1"
+echo "\$ghprbPullTitle: $ghprbPullTitle"
 
 # Run pull request tests
 for t in "${PR_TESTS[@]}"; do
@@ -189,6 +190,19 @@ done
 {
   # Marks this build is a pull request build.
   export AMP_JENKINS_PRB=true
+  if [[ $ghprbPullTitle == *"test-maven"* ]]; then
+    export AMPLAB_JENKINS_BUILD_TOOL="maven"
+  fi
+  if [[ $ghprbPullTitle == *"test-hadoop1.0"* ]]; then
+    export AMPLAB_JENKINS_BUILD_PROFILE="hadoop1.0"
+  elif [[ $ghprbPullTitle == *"test-hadoop2.0"* ]]; then
+    export AMPLAB_JENKINS_BUILD_PROFILE="hadoop2.0"
+  elif [[ $ghprbPullTitle == *"test-hadoop2.2"* ]]; then
+    export AMPLAB_JENKINS_BUILD_PROFILE="hadoop2.2"
+  elif [[ $ghprbPullTitle == *"test-hadoop2.3"* ]]; then
+    export AMPLAB_JENKINS_BUILD_PROFILE="hadoop2.3"
+  fi
+
   timeout "${TESTS_TIMEOUT}" ./dev/run-tests
   test_result="$?"
 

dev/run-tests.py

@@ -21,6 +21,7 @@ from __future__ import print_function
 import itertools
 from optparse import OptionParser
 import os
+import random
 import re
 import sys
 import subprocess
@@ -239,11 +240,32 @@ def build_spark_documentation():
     os.chdir(SPARK_HOME)
 
 
+def get_zinc_port():
+    """
+    Get a randomized port on which to start Zinc
+    """
+    return random.randrange(3030, 4030)
+
+
+def kill_zinc_on_port(zinc_port):
+    """
+    Kill the Zinc process running on the given port, if one exists.
+    """
+    cmd = ("/usr/sbin/lsof -P |grep %s | grep LISTEN "
+           "| awk '{ print $2; }' | xargs kill") % zinc_port
+    subprocess.check_call(cmd, shell=True)
+
+
 def exec_maven(mvn_args=()):
     """Will call Maven in the current directory with the list of mvn_args passed
     in and returns the subprocess for any further processing"""
 
-    run_cmd([os.path.join(SPARK_HOME, "build", "mvn")] + mvn_args)
+    zinc_port = get_zinc_port()
+    os.environ["ZINC_PORT"] = "%s" % zinc_port
+    zinc_flag = "-DzincPort=%s" % zinc_port
+    flags = [os.path.join(SPARK_HOME, "build", "mvn"), "--force", zinc_flag]
+    run_cmd(flags + mvn_args)
+    kill_zinc_on_port(zinc_port)
 
 
 def exec_sbt(sbt_args=()):
@@ -514,7 +536,9 @@ def main():
     build_apache_spark(build_tool, hadoop_version)
 
     # backwards compatibility checks
-    detect_binary_inop_with_mima()
+    if build_tool == "sbt":
+        # Note: compatiblity tests only supported in sbt for now
+        detect_binary_inop_with_mima()
 
     # run the test suites
     run_scala_tests(build_tool, hadoop_version, test_modules)