From 54504133f41e36eaea6bb06c7b9ddb249468ecd7 Mon Sep 17 00:00:00 2001 From: Zhijie Shen Date: Wed, 27 May 2015 16:51:48 -0700 Subject: [PATCH] YARN-3700. Made generic history service load a number of latest applications according to the parameter or the configuration. Contributed by Xuan Gong. --- hadoop-yarn-project/CHANGES.txt | 3 +++ .../hadoop/yarn/conf/YarnConfiguration.java | 9 +++++++ .../hadoop/yarn/webapp/YarnWebParams.java | 1 + .../src/main/resources/yarn-default.xml | 9 +++++++ .../ApplicationHistoryClientService.java | 2 +- .../ApplicationHistoryManager.java | 12 ++++++--- .../ApplicationHistoryManagerImpl.java | 2 +- ...licationHistoryManagerOnTimelineStore.java | 13 +++++++--- .../TestApplicationHistoryClientService.java | 26 ++++++++++++++++--- ...licationHistoryManagerOnTimelineStore.java | 12 +++++---- .../hadoop/yarn/server/webapp/AppsBlock.java | 7 ++++- .../yarn/server/webapp/WebServices.java | 17 ++++-------- .../src/site/markdown/TimelineServer.md | 1 + 13 files changed, 83 insertions(+), 31 deletions(-) diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt index 2ae923ddb1..1d22076329 100644 --- a/hadoop-yarn-project/CHANGES.txt +++ b/hadoop-yarn-project/CHANGES.txt @@ -274,6 +274,9 @@ Release 2.8.0 - UNRELEASED YARN-3581. Deprecate -directlyAccessNodeLabelStore in RMAdminCLI. (Naganarasimha G R via wangda) + YARN-3700. Made generic history service load a number of latest applications + according to the parameter or the configuration. (Xuan Gong via zjshen) + OPTIMIZATIONS YARN-3339. TestDockerContainerExecutor should pull a single image and not diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java index 1b6d9c9ea3..17cb0205ec 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java @@ -1459,6 +1459,15 @@ private static void addDeprecatedKeys() { public static final String DEFAULT_TIMELINE_SERVICE_WEBAPP_HTTPS_ADDRESS = "0.0.0.0:" + DEFAULT_TIMELINE_SERVICE_WEBAPP_HTTPS_PORT; + /** + * Defines the max number of applications could be fetched using + * REST API or application history protocol and shown in timeline + * server web ui. + */ + public static final String APPLICATION_HISTORY_PREFIX_MAX_APPS = + APPLICATION_HISTORY_PREFIX + "max-applications"; + public static final long DEFAULT_APPLICATION_HISTORY_PREFIX_MAX_APPS = 10000; + /** Timeline service store class */ public static final String TIMELINE_SERVICE_STORE = TIMELINE_SERVICE_PREFIX + "store-class"; diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/YarnWebParams.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/YarnWebParams.java index 1200690b82..199f4cc17c 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/YarnWebParams.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/YarnWebParams.java @@ -33,6 +33,7 @@ public interface YarnWebParams { String ENTITY_STRING = "entity.string"; String APP_OWNER = "app.owner"; String APP_STATE = "app.state"; + String APPS_NUM = "apps.num"; String QUEUE_NAME = "queue.name"; String NODE_STATE = "node.state"; String NODE_LABEL = "node.label"; diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-default.xml b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-default.xml index 433266fb47..d94157cfed 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-default.xml +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-default.xml @@ -1381,6 +1381,15 @@ + + + Defines the max number of applications could be fetched using REST API or + application history protocol and shown in timeline server web ui. + + yarn.timeline-service.generic-application-history.max-applications + 10000 + + Store class name for timeline store. yarn.timeline-service.store-class diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryClientService.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryClientService.java index e64ca14ce8..74279266c6 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryClientService.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryClientService.java @@ -186,7 +186,7 @@ public GetApplicationReportResponse getApplicationReport( IOException { GetApplicationsResponse response = GetApplicationsResponse.newInstance(new ArrayList( - history.getAllApplications().values())); + history.getApplications(request.getLimit()).values())); return response; } diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManager.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManager.java index 041c31bc37..c218eec000 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManager.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManager.java @@ -51,16 +51,20 @@ ApplicationReport getApplication(ApplicationId appId) throws YarnException, IOException; /** - * This method returns all Application {@link ApplicationReport}s - * + * This method returns the given number of Application + * {@link ApplicationReport}s. + * + * @param appsNum + * * @return map of {@link ApplicationId} to {@link ApplicationReport}s. * @throws YarnException * @throws IOException */ @Public @Unstable - Map getAllApplications() - throws YarnException, IOException; + Map + getApplications(long appsNum) throws YarnException, + IOException; /** * Application can have multiple application attempts diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManagerImpl.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManagerImpl.java index c7cf07b1a8..479858f35b 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManagerImpl.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManagerImpl.java @@ -98,7 +98,7 @@ public ContainerReport getAMContainer(ApplicationAttemptId appAttemptId) } @Override - public Map getAllApplications() + public Map getApplications(long appsNum) throws IOException { Map histData = historyStore.getAllApplications(); diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManagerOnTimelineStore.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManagerOnTimelineStore.java index 2429a6896d..d3e7b5c803 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManagerOnTimelineStore.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryManagerOnTimelineStore.java @@ -50,6 +50,7 @@ import org.apache.hadoop.yarn.api.records.timeline.TimelineEntities; import org.apache.hadoop.yarn.api.records.timeline.TimelineEntity; import org.apache.hadoop.yarn.api.records.timeline.TimelineEvent; +import org.apache.hadoop.yarn.conf.YarnConfiguration; import org.apache.hadoop.yarn.exceptions.ApplicationAttemptNotFoundException; import org.apache.hadoop.yarn.exceptions.ApplicationNotFoundException; import org.apache.hadoop.yarn.exceptions.ContainerNotFoundException; @@ -78,6 +79,7 @@ public class ApplicationHistoryManagerOnTimelineStore extends AbstractService private TimelineDataManager timelineDataManager; private ApplicationACLsManager aclsManager; private String serverHttpAddress; + private long maxLoadedApplications; public ApplicationHistoryManagerOnTimelineStore( TimelineDataManager timelineDataManager, @@ -91,6 +93,9 @@ public ApplicationHistoryManagerOnTimelineStore( protected void serviceInit(Configuration conf) throws Exception { serverHttpAddress = WebAppUtils.getHttpSchemePrefix(conf) + WebAppUtils.getAHSWebAppURLWithoutScheme(conf); + maxLoadedApplications = + conf.getLong(YarnConfiguration.APPLICATION_HISTORY_PREFIX_MAX_APPS, + YarnConfiguration.DEFAULT_APPLICATION_HISTORY_PREFIX_MAX_APPS); super.serviceInit(conf); } @@ -101,12 +106,12 @@ public ApplicationReport getApplication(ApplicationId appId) } @Override - public Map getAllApplications() + public Map getApplications(long appsNum) throws YarnException, IOException { TimelineEntities entities = timelineDataManager.getEntities( - ApplicationMetricsConstants.ENTITY_TYPE, null, null, null, null, - null, null, Long.MAX_VALUE, EnumSet.allOf(Field.class), - UserGroupInformation.getLoginUser()); + ApplicationMetricsConstants.ENTITY_TYPE, null, null, null, null, null, + null, appsNum == Long.MAX_VALUE ? this.maxLoadedApplications : appsNum, + EnumSet.allOf(Field.class), UserGroupInformation.getLoginUser()); Map apps = new LinkedHashMap(); if (entities != null && entities.getEntities() != null) { diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/test/java/org/apache/hadoop/yarn/server/applicationhistoryservice/TestApplicationHistoryClientService.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/test/java/org/apache/hadoop/yarn/server/applicationhistoryservice/TestApplicationHistoryClientService.java index d03b26dc08..ad03718e4b 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/test/java/org/apache/hadoop/yarn/server/applicationhistoryservice/TestApplicationHistoryClientService.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/test/java/org/apache/hadoop/yarn/server/applicationhistoryservice/TestApplicationHistoryClientService.java @@ -53,6 +53,7 @@ public class TestApplicationHistoryClientService { private static ApplicationHistoryClientService clientService; + private static TimelineDataManager dataManager; @BeforeClass public static void setup() throws Exception { @@ -60,7 +61,7 @@ public static void setup() throws Exception { TimelineStore store = TestApplicationHistoryManagerOnTimelineStore.createStore(2); TimelineACLsManager aclsManager = new TimelineACLsManager(conf); - TimelineDataManager dataManager = + dataManager = new TimelineDataManager(store, aclsManager); ApplicationACLsManager appAclsManager = new ApplicationACLsManager(conf); ApplicationHistoryManagerOnTimelineStore historyManager = @@ -101,8 +102,27 @@ public void testApplications() throws IOException, YarnException { clientService.getApplications(request); List appReport = response.getApplicationList(); Assert.assertNotNull(appReport); - Assert.assertEquals(appId, appReport.get(0).getApplicationId()); - Assert.assertEquals(appId1, appReport.get(1).getApplicationId()); + Assert.assertEquals(appId, appReport.get(1).getApplicationId()); + Assert.assertEquals(appId1, appReport.get(0).getApplicationId()); + + // Create a historyManager, and set the max_apps can be loaded + // as 1. + Configuration conf = new YarnConfiguration(); + conf.setLong(YarnConfiguration.APPLICATION_HISTORY_PREFIX_MAX_APPS, 1); + ApplicationHistoryManagerOnTimelineStore historyManager2 = + new ApplicationHistoryManagerOnTimelineStore(dataManager, + new ApplicationACLsManager(conf)); + historyManager2.init(conf); + historyManager2.start(); + @SuppressWarnings("resource") + ApplicationHistoryClientService clientService2 = + new ApplicationHistoryClientService(historyManager2); + response = clientService2.getApplications(request); + appReport = response.getApplicationList(); + Assert.assertNotNull(appReport); + Assert.assertTrue(appReport.size() == 1); + // Expected to get the appReport for application with appId1 + Assert.assertEquals(appId1, appReport.get(0).getApplicationId()); } @Test diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/test/java/org/apache/hadoop/yarn/server/applicationhistoryservice/TestApplicationHistoryManagerOnTimelineStore.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/test/java/org/apache/hadoop/yarn/server/applicationhistoryservice/TestApplicationHistoryManagerOnTimelineStore.java index fcdafc2944..86729536cd 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/test/java/org/apache/hadoop/yarn/server/applicationhistoryservice/TestApplicationHistoryManagerOnTimelineStore.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/test/java/org/apache/hadoop/yarn/server/applicationhistoryservice/TestApplicationHistoryManagerOnTimelineStore.java @@ -180,8 +180,10 @@ public ApplicationReport run() throws Exception { Assert.assertEquals("test app type", app.getApplicationType()); Assert.assertEquals("user1", app.getUser()); Assert.assertEquals("test queue", app.getQueue()); - Assert.assertEquals(Integer.MAX_VALUE + 2L, app.getStartTime()); - Assert.assertEquals(Integer.MAX_VALUE + 3L, app.getFinishTime()); + Assert.assertEquals(Integer.MAX_VALUE + 2L + + app.getApplicationId().getId(), app.getStartTime()); + Assert.assertEquals(Integer.MAX_VALUE + 3L + + +app.getApplicationId().getId(), app.getFinishTime()); Assert.assertTrue(Math.abs(app.getProgress() - 1.0F) < 0.0001); // App 2 doesn't have the ACLs, such that the default ACLs " " will be used. // Nobody except admin and owner has access to the details of the app. @@ -335,7 +337,7 @@ public ContainerReport run() throws Exception { @Test public void testGetApplications() throws Exception { Collection apps = - historyManager.getAllApplications().values(); + historyManager.getApplications(Long.MAX_VALUE).values(); Assert.assertNotNull(apps); Assert.assertEquals(SCALE + 1, apps.size()); ApplicationId ignoredAppId = ApplicationId.newInstance(0, SCALE + 2); @@ -472,12 +474,12 @@ private static TimelineEntity createApplicationTimelineEntity( entity.setOtherInfo(entityInfo); TimelineEvent tEvent = new TimelineEvent(); tEvent.setEventType(ApplicationMetricsConstants.CREATED_EVENT_TYPE); - tEvent.setTimestamp(Integer.MAX_VALUE + 2L); + tEvent.setTimestamp(Integer.MAX_VALUE + 2L + appId.getId()); entity.addEvent(tEvent); tEvent = new TimelineEvent(); tEvent.setEventType( ApplicationMetricsConstants.FINISHED_EVENT_TYPE); - tEvent.setTimestamp(Integer.MAX_VALUE + 3L); + tEvent.setTimestamp(Integer.MAX_VALUE + 3L + appId.getId()); Map eventInfo = new HashMap(); eventInfo.put(ApplicationMetricsConstants.DIAGNOSTICS_INFO_EVENT_INFO, "test diagnostics info"); diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppsBlock.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppsBlock.java index 5df70c4773..b0a3f2bcf6 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppsBlock.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppsBlock.java @@ -20,6 +20,7 @@ import static org.apache.hadoop.yarn.util.StringHelper.join; import static org.apache.hadoop.yarn.webapp.YarnWebParams.APP_STATE; +import static org.apache.hadoop.yarn.webapp.YarnWebParams.APPS_NUM; import static org.apache.hadoop.yarn.webapp.view.JQueryUI.C_PROGRESSBAR; import static org.apache.hadoop.yarn.webapp.view.JQueryUI.C_PROGRESSBAR_VALUE; @@ -70,10 +71,14 @@ protected void fetchData() throws YarnException, IOException, reqAppStates.add(YarnApplicationState.valueOf(stateString.trim())); } } - callerUGI = getCallerUGI(); final GetApplicationsRequest request = GetApplicationsRequest.newInstance(reqAppStates); + String appsNumStr = $(APPS_NUM); + if (appsNumStr != null && !appsNumStr.isEmpty()) { + long appsNum = Long.parseLong(appsNumStr); + request.setLimit(appsNum); + } if (callerUGI == null) { appReports = appBaseProt.getApplications(request).getApplicationList(); } else { diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/WebServices.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/WebServices.java index 909bf1d022..8404719a4b 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/WebServices.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/WebServices.java @@ -72,13 +72,11 @@ public AppsInfo getApps(HttpServletRequest req, HttpServletResponse res, String startedEnd, String finishBegin, String finishEnd, Set applicationTypes) { UserGroupInformation callerUGI = getUser(req); - long num = 0; - boolean checkCount = false; boolean checkStart = false; boolean checkEnd = false; boolean checkAppTypes = false; boolean checkAppStates = false; - long countNum = 0; + long countNum = Long.MAX_VALUE; // set values suitable in case both of begin/end not specified long sBegin = 0; @@ -87,7 +85,6 @@ public AppsInfo getApps(HttpServletRequest req, HttpServletResponse res, long fEnd = Long.MAX_VALUE; if (count != null && !count.isEmpty()) { - checkCount = true; countNum = Long.parseLong(count); if (countNum <= 0) { throw new BadRequestException("limit value must be greater then 0"); @@ -148,19 +145,20 @@ public AppsInfo getApps(HttpServletRequest req, HttpServletResponse res, AppsInfo allApps = new AppsInfo(); Collection appReports = null; + final GetApplicationsRequest request = + GetApplicationsRequest.newInstance(); + request.setLimit(countNum); try { if (callerUGI == null) { // TODO: the request should take the params like what RMWebServices does // in YARN-1819. - GetApplicationsRequest request = GetApplicationsRequest.newInstance(); appReports = appBaseProt.getApplications(request).getApplicationList(); } else { appReports = callerUGI.doAs( new PrivilegedExceptionAction> () { @Override public Collection run() throws Exception { - return appBaseProt.getApplications( - GetApplicationsRequest.newInstance()).getApplicationList(); + return appBaseProt.getApplications(request).getApplicationList(); } }); } @@ -169,10 +167,6 @@ public Collection run() throws Exception { } for (ApplicationReport appReport : appReports) { - if (checkCount && num == countNum) { - break; - } - if (checkAppStates && !appStates.contains(StringUtils.toLowerCase( appReport.getYarnApplicationState().toString()))) { @@ -212,7 +206,6 @@ public Collection run() throws Exception { AppInfo app = new AppInfo(appReport); allApps.add(app); - num++; } return allApps; } diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/TimelineServer.md b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/TimelineServer.md index e17721523a..5a18fb2425 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/TimelineServer.md +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/TimelineServer.md @@ -183,6 +183,7 @@ selected if this policy is either of `HTTPS_ONLY` or `HTTP_AND_HTTPS`. | `yarn.timeline-service.handler-thread-count` | Handler thread count to serve the client RPC requests. Defaults to `10`. | | `yarn.timeline-service.client.max-retries` | The maximum number of retries for attempts to publish data to the timeline service.Defaults to `30`. | | `yarn.timeline-service.client.retry-interval-ms` | The interval in milliseconds between retries for the timeline service client. Defaults to `1000`. | +| `yarn.timeline-service.generic-application-history.max-applications` | The max number of applications could be fetched by using REST API or application history protocol and shown in timeline server web ui. Defaults to `10000`. |