YARN-8840. Add missing cleanupSSLConfig() call for TestTimelineClient test. Contributed by Aki Tanaka.

(cherry picked from commit 39b35036ba47064149003046a7b59feb01575d1e)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/client/api/impl/TestTimelineClient.java

@@ -25,7 +25,6 @@ import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
 
-import java.io.File;
 import java.io.IOException;
 import java.net.ConnectException;
 import java.net.SocketTimeoutException;
@@ -62,6 +61,8 @@ public class TestTimelineClient {
 
   private TimelineClientImpl client;
   private TimelineWriter spyTimelineWriter;
+  private String keystoresDir;
+  private String sslConfDir;
 
   @Before
   public void setup() {
@@ -72,10 +73,13 @@ public class TestTimelineClient {
   }
 
   @After
-  public void tearDown() {
+  public void tearDown() throws Exception {
     if (client != null) {
       client.stop();
     }
+    if (isSSLConfigured()) {
+      KeyStoreTestUtil.cleanupSSLConfig(keystoresDir, sslConfDir);
+    }
   }
 
   @Test
@@ -453,11 +457,7 @@ public class TestTimelineClient {
     conf.setInt(YarnConfiguration.TIMELINE_SERVICE_CLIENT_MAX_RETRIES, 0);
     conf.set(YarnConfiguration.YARN_HTTP_POLICY_KEY, Policy.HTTPS_ONLY.name());
 
-    File testDir = TestGenericTestUtils.getTestDir();
-    String sslConfDir =
-        KeyStoreTestUtil.getClasspathDir(TestTimelineClient.class);
-    KeyStoreTestUtil.setupSSLConfig(testDir.getAbsolutePath(),
-        sslConfDir, conf, false);
+    setupSSLConfig(conf);
     client = createTimelineClient(conf);
 
     ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
@@ -491,6 +491,17 @@ public class TestTimelineClient {
     Assert.assertFalse("Reloader is still alive", reloaderStillAlive);
   }
 
+  private void setupSSLConfig(YarnConfiguration conf) throws Exception {
+    keystoresDir = TestGenericTestUtils.getTestDir().getAbsolutePath();
+    sslConfDir =
+        KeyStoreTestUtil.getClasspathDir(TestTimelineClient.class);
+    KeyStoreTestUtil.setupSSLConfig(keystoresDir, sslConfDir, conf, false);
+  }
+
+  private boolean isSSLConfigured() {
+    return keystoresDir != null && sslConfDir != null;
+  }
+
   private static class TestTimelineDelegationTokenSecretManager extends
       AbstractDelegationTokenSecretManager<TimelineDelegationTokenIdentifier> {