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From GitBox <...@apache.org>
Subject [GitHub] zentol closed pull request #6868: [FLINK-10582] Make REST executor's thread priority configurable
Date Wed, 17 Oct 2018 14:45:41 GMT
zentol closed pull request #6868: [FLINK-10582] Make REST executor's thread priority configurable
URL: https://github.com/apache/flink/pull/6868
 
 
   

This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:

As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):

diff --git a/docs/_includes/generated/rest_configuration.html b/docs/_includes/generated/rest_configuration.html
index 1aa963fb3e2..2c5f539a480 100644
--- a/docs/_includes/generated/rest_configuration.html
+++ b/docs/_includes/generated/rest_configuration.html
@@ -62,5 +62,10 @@
             <td style="word-wrap: break-word;">4</td>
             <td>The number of threads for the asynchronous processing of requests.</td>
         </tr>
+        <tr>
+            <td><h5>rest.server.thread-priority</h5></td>
+            <td style="word-wrap: break-word;">5</td>
+            <td>Thread priority of the REST server's executor for processing asynchronous
requests. Lowering the thread priority will give Flink's main components more CPU time whereas
increasing will allocate more time for the REST server's processing.</td>
+        </tr>
     </tbody>
 </table>
diff --git a/flink-core/src/main/java/org/apache/flink/configuration/RestOptions.java b/flink-core/src/main/java/org/apache/flink/configuration/RestOptions.java
index edfd39be808..11c38de06c6 100644
--- a/flink-core/src/main/java/org/apache/flink/configuration/RestOptions.java
+++ b/flink-core/src/main/java/org/apache/flink/configuration/RestOptions.java
@@ -19,6 +19,7 @@
 package org.apache.flink.configuration;
 
 import org.apache.flink.annotation.Internal;
+import org.apache.flink.configuration.description.Description;
 
 import static org.apache.flink.configuration.ConfigOptions.key;
 
@@ -121,4 +122,12 @@
 		key("rest.server.numThreads")
 			.defaultValue(4)
 			.withDescription("The number of threads for the asynchronous processing of requests.");
+
+	public static final ConfigOption<Integer> SERVER_THREAD_PRIORITY = key("rest.server.thread-priority")
+		.defaultValue(Thread.NORM_PRIORITY)
+		.withDescription(Description.builder()
+			.text("Thread priority of the REST server's executor for processing asynchronous requests.
" +
+				"Lowering the thread priority will give Flink's main components more CPU time whereas
" +
+				"increasing will allocate more time for the REST server's processing.")
+			.build());
 }
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/entrypoint/component/AbstractDispatcherResourceManagerComponentFactory.java
b/flink-runtime/src/main/java/org/apache/flink/runtime/entrypoint/component/AbstractDispatcherResourceManagerComponentFactory.java
index c09c41bb2ec..6d557d0815f 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/entrypoint/component/AbstractDispatcherResourceManagerComponentFactory.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/entrypoint/component/AbstractDispatcherResourceManagerComponentFactory.java
@@ -141,6 +141,7 @@ public AbstractDispatcherResourceManagerComponentFactory(
 				blobServer,
 				WebMonitorEndpoint.createExecutorService(
 					configuration.getInteger(RestOptions.SERVER_NUM_THREADS),
+					configuration.getInteger(RestOptions.SERVER_THREAD_PRIORITY),
 					"DispatcherRestEndpoint"),
 				new AkkaQueryServiceRetriever(actorSystem, timeout),
 				highAvailabilityServices.getWebMonitorLeaderElectionService(),
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/minicluster/MiniCluster.java
b/flink-runtime/src/main/java/org/apache/flink/runtime/minicluster/MiniCluster.java
index 3fc7007f9c5..69bad47e158 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/minicluster/MiniCluster.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/minicluster/MiniCluster.java
@@ -356,6 +356,7 @@ public void start() throws Exception {
 					blobServer.getTransientBlobService(),
 					WebMonitorEndpoint.createExecutorService(
 						configuration.getInteger(RestOptions.SERVER_NUM_THREADS, 1),
+						configuration.getInteger(RestOptions.SERVER_THREAD_PRIORITY),
 						"DispatcherRestEndpoint"),
 					new AkkaQueryServiceRetriever(
 						metricQueryServiceActorSystem,
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/webmonitor/WebMonitorEndpoint.java
b/flink-runtime/src/main/java/org/apache/flink/runtime/webmonitor/WebMonitorEndpoint.java
index 02d92dc54fb..c480c33c671 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/webmonitor/WebMonitorEndpoint.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/webmonitor/WebMonitorEndpoint.java
@@ -783,11 +783,20 @@ public void handleError(final Exception exception) {
 		return archivedJson;
 	}
 
-	public static ExecutorService createExecutorService(int numThreads, String componentName)
{
+	public static ExecutorService createExecutorService(int numThreads, int threadPriority,
String componentName) {
+		if (threadPriority < Thread.MIN_PRIORITY || threadPriority > Thread.MAX_PRIORITY)
{
+			throw new IllegalArgumentException(
+				String.format(
+					"The thread priority must be within (%s, %s) but it was %s.",
+					Thread.MIN_PRIORITY,
+					Thread.MAX_PRIORITY,
+					threadPriority));
+		}
+
 		return Executors.newFixedThreadPool(
 			numThreads,
 			new ExecutorThreadFactory.Builder()
-				.setThreadPriority(Thread.MIN_PRIORITY)
+				.setThreadPriority(threadPriority)
 				.setPoolName("Flink-" + componentName)
 				.build());
 	}


 

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