YARN-9990. Testcase fails with Insufficient configured threads: required=16 < max=10. Contributed by Prabhu Joseph.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-api/src/test/java/org/apache/hadoop/yarn/service/client/TestApiServiceClient.java

@@ -91,7 +91,7 @@ public class TestApiServiceClient {
   @BeforeClass
   public static void setup() throws Exception {
     server = new Server(8088);
-    ((QueuedThreadPool)server.getThreadPool()).setMaxThreads(10);
+    ((QueuedThreadPool)server.getThreadPool()).setMaxThreads(20);
     ServletContextHandler context = new ServletContextHandler();
     context.setContextPath("/app");
     server.setHandler(context);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-api/src/test/java/org/apache/hadoop/yarn/service/client/TestSecureApiServiceClient.java

@@ -140,7 +140,7 @@ public class TestSecureApiServiceClient extends KerberosSecurityTestcase {
     props = new HashMap<String, String>();
     props.put(Sasl.QOP, QualityOfProtection.AUTHENTICATION.saslQop);
     server = new Server(8088);
-    ((QueuedThreadPool)server.getThreadPool()).setMaxThreads(10);
+    ((QueuedThreadPool)server.getThreadPool()).setMaxThreads(20);
     ServletContextHandler context = new ServletContextHandler();
     context.setContextPath("/app");
     server.setHandler(context);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-web-proxy/src/test/java/org/apache/hadoop/yarn/server/webproxy/TestWebAppProxyServlet.java

@@ -93,7 +93,7 @@ public class TestWebAppProxyServlet {
   @BeforeClass
   public static void start() throws Exception {
     server = new Server(0);
-    ((QueuedThreadPool)server.getThreadPool()).setMaxThreads(10);
+    ((QueuedThreadPool)server.getThreadPool()).setMaxThreads(20);
     ServletContextHandler context = new ServletContextHandler();
     context.setContextPath("/foo");
     server.setHandler(context);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-web-proxy/src/test/java/org/apache/hadoop/yarn/server/webproxy/amfilter/TestAmFilter.java

@@ -169,7 +169,7 @@ public class TestAmFilter {
 
   private String startHttpServer() throws Exception {
     Server server = new Server(0);
-    ((QueuedThreadPool)server.getThreadPool()).setMaxThreads(10);
+    ((QueuedThreadPool)server.getThreadPool()).setMaxThreads(20);
     ServletContextHandler context = new ServletContextHandler();
     context.setContextPath("/foo");
     server.setHandler(context);