diff --git a/x-pack/plugins/cross_cluster_replication/server/plugin.ts b/x-pack/plugins/cross_cluster_replication/server/plugin.ts
index 25c99803480f3c..7ef085a21ac1a4 100644
--- a/x-pack/plugins/cross_cluster_replication/server/plugin.ts
+++ b/x-pack/plugins/cross_cluster_replication/server/plugin.ts
@@ -15,6 +15,7 @@ import { first } from 'rxjs/operators';
 import { i18n } from '@kbn/i18n';
 import {
   CoreSetup,
+  ICustomClusterClient,
   Plugin,
   Logger,
   PluginInitializerContext,
@@ -36,6 +37,13 @@ interface CrossClusterReplicationContext {
   client: IScopedClusterClient;
 }
 
+async function getCustomEsClient(getStartServices: CoreSetup['getStartServices']) {
+  const [core] = await getStartServices();
+  // Extend the elasticsearchJs client with additional endpoints.
+  const esClientConfig = { plugins: [elasticsearchJsPlugin] };
+  return core.elasticsearch.legacy.createClient('crossClusterReplication', esClientConfig);
+}
+
 const ccrDataEnricher = async (indicesList: Index[], callWithRequest: APICaller) => {
   if (!indicesList?.length) {
     return indicesList;
@@ -69,6 +77,7 @@ export class CrossClusterReplicationServerPlugin implements Plugin<void, void, a
   private readonly config$: Observable<CrossClusterReplicationConfig>;
   private readonly license: License;
   private readonly logger: Logger;
+  private ccrEsClient?: ICustomClusterClient;
 
   constructor(initializerContext: PluginInitializerContext) {
     this.logger = initializerContext.logger.get();
@@ -77,7 +86,7 @@ export class CrossClusterReplicationServerPlugin implements Plugin<void, void, a
   }
 
   setup(
-    { http, elasticsearch }: CoreSetup,
+    { http, getStartServices }: CoreSetup,
     { licensing, indexManagement, remoteClusters }: Dependencies
   ) {
     this.config$
@@ -115,12 +124,10 @@ export class CrossClusterReplicationServerPlugin implements Plugin<void, void, a
       }
     );
 
-    // Extend the elasticsearchJs client with additional endpoints.
-    const esClientConfig = { plugins: [elasticsearchJsPlugin] };
-    const ccrEsClient = elasticsearch.createClient('crossClusterReplication', esClientConfig);
-    http.registerRouteHandlerContext('crossClusterReplication', (ctx, request) => {
+    http.registerRouteHandlerContext('crossClusterReplication', async (ctx, request) => {
+      this.ccrEsClient = this.ccrEsClient ?? (await getCustomEsClient(getStartServices));
       return {
-        client: ccrEsClient.asScoped(request),
+        client: this.ccrEsClient.asScoped(request),
       };
     });
 
@@ -135,5 +142,10 @@ export class CrossClusterReplicationServerPlugin implements Plugin<void, void, a
   }
 
   start() {}
-  stop() {}
+
+  stop() {
+    if (this.ccrEsClient) {
+      this.ccrEsClient.close();
+    }
+  }
 }
diff --git a/x-pack/plugins/rollup/server/plugin.ts b/x-pack/plugins/rollup/server/plugin.ts
index ee9a1844c7468b..575bc9bf9dff1e 100644
--- a/x-pack/plugins/rollup/server/plugin.ts
+++ b/x-pack/plugins/rollup/server/plugin.ts
@@ -14,6 +14,7 @@ import { Observable } from 'rxjs';
 import { first } from 'rxjs/operators';
 import {
   CoreSetup,
+  ICustomClusterClient,
   Plugin,
   Logger,
   KibanaRequest,
@@ -42,11 +43,18 @@ import { mergeCapabilitiesWithFields } from './lib/merge_capabilities_with_field
 interface RollupContext {
   client: IScopedClusterClient;
 }
+async function getCustomEsClient(getStartServices: CoreSetup['getStartServices']) {
+  const [core] = await getStartServices();
+  // Extend the elasticsearchJs client with additional endpoints.
+  const esClientConfig = { plugins: [elasticsearchJsPlugin] };
+  return core.elasticsearch.legacy.createClient('rollup', esClientConfig);
+}
 
 export class RollupPlugin implements Plugin<void, void, any, any> {
   private readonly logger: Logger;
   private readonly globalConfig$: Observable<SharedGlobalConfig>;
   private readonly license: License;
+  private rollupEsClient?: ICustomClusterClient;
 
   constructor(initializerContext: PluginInitializerContext) {
     this.logger = initializerContext.logger.get();
@@ -55,7 +63,7 @@ export class RollupPlugin implements Plugin<void, void, any, any> {
   }
 
   public setup(
-    { http, uiSettings, elasticsearch }: CoreSetup,
+    { http, uiSettings, getStartServices }: CoreSetup,
     { licensing, indexManagement, visTypeTimeseries, usageCollection }: Dependencies
   ) {
     this.license.setup(
@@ -72,12 +80,10 @@ export class RollupPlugin implements Plugin<void, void, any, any> {
       }
     );
 
-    // Extend the elasticsearchJs client with additional endpoints.
-    const esClientConfig = { plugins: [elasticsearchJsPlugin] };
-    const rollupEsClient = elasticsearch.createClient('rollup', esClientConfig);
-    http.registerRouteHandlerContext('rollup', (context, request) => {
+    http.registerRouteHandlerContext('rollup', async (context, request) => {
+      this.rollupEsClient = this.rollupEsClient ?? (await getCustomEsClient(getStartServices));
       return {
-        client: rollupEsClient.asScoped(request),
+        client: this.rollupEsClient.asScoped(request),
       };
     });
 
@@ -116,7 +122,12 @@ export class RollupPlugin implements Plugin<void, void, any, any> {
       const callWithRequestFactoryShim = (
         elasticsearchServiceShim: CallWithRequestFactoryShim,
         request: KibanaRequest
-      ): APICaller => rollupEsClient.asScoped(request).callAsCurrentUser;
+      ): APICaller => {
+        return async (...args: Parameters<APICaller>) => {
+          this.rollupEsClient = this.rollupEsClient ?? (await getCustomEsClient(getStartServices));
+          return await this.rollupEsClient.asScoped(request).callAsCurrentUser(...args);
+        };
+      };
 
       const { addSearchStrategy } = visTypeTimeseries;
       registerRollupSearchStrategy(callWithRequestFactoryShim, addSearchStrategy);
@@ -140,5 +151,10 @@ export class RollupPlugin implements Plugin<void, void, any, any> {
   }
 
   start() {}
-  stop() {}
+
+  stop() {
+    if (this.rollupEsClient) {
+      this.rollupEsClient.close();
+    }
+  }
 }
diff --git a/x-pack/plugins/snapshot_restore/server/plugin.ts b/x-pack/plugins/snapshot_restore/server/plugin.ts
index 00ff3db976d661..c5d3c665a3b7f5 100644
--- a/x-pack/plugins/snapshot_restore/server/plugin.ts
+++ b/x-pack/plugins/snapshot_restore/server/plugin.ts
@@ -13,6 +13,7 @@ import { first } from 'rxjs/operators';
 import { i18n } from '@kbn/i18n';
 import {
   CoreSetup,
+  ICustomClusterClient,
   Plugin,
   Logger,
   PluginInitializerContext,
@@ -31,10 +32,17 @@ export interface SnapshotRestoreContext {
   client: IScopedClusterClient;
 }
 
+async function getCustomEsClient(getStartServices: CoreSetup['getStartServices']) {
+  const [core] = await getStartServices();
+  const esClientConfig = { plugins: [elasticsearchJsPlugin] };
+  return core.elasticsearch.legacy.createClient('snapshotRestore', esClientConfig);
+}
+
 export class SnapshotRestoreServerPlugin implements Plugin<void, void, any, any> {
   private readonly logger: Logger;
   private readonly apiRoutes: ApiRoutes;
   private readonly license: License;
+  private snapshotRestoreESClient?: ICustomClusterClient;
 
   constructor(private context: PluginInitializerContext) {
     const { logger } = this.context;
@@ -44,7 +52,7 @@ export class SnapshotRestoreServerPlugin implements Plugin<void, void, any, any>
   }
 
   public async setup(
-    { http, elasticsearch }: CoreSetup,
+    { http, getStartServices }: CoreSetup,
     { licensing, security, cloud }: Dependencies
   ): Promise<void> {
     const pluginConfig = await this.context.config
@@ -72,11 +80,11 @@ export class SnapshotRestoreServerPlugin implements Plugin<void, void, any, any>
       }
     );
 
-    const esClientConfig = { plugins: [elasticsearchJsPlugin] };
-    const snapshotRestoreESClient = elasticsearch.createClient('snapshotRestore', esClientConfig);
-    http.registerRouteHandlerContext('snapshotRestore', (ctx, request) => {
+    http.registerRouteHandlerContext('snapshotRestore', async (ctx, request) => {
+      this.snapshotRestoreESClient =
+        this.snapshotRestoreESClient ?? (await getCustomEsClient(getStartServices));
       return {
-        client: snapshotRestoreESClient.asScoped(request),
+        client: this.snapshotRestoreESClient.asScoped(request),
       };
     });
 
@@ -95,11 +103,11 @@ export class SnapshotRestoreServerPlugin implements Plugin<void, void, any, any>
     });
   }
 
-  public start() {
-    this.logger.debug('Starting plugin');
-  }
+  public start() {}
 
   public stop() {
-    this.logger.debug('Stopping plugin');
+    if (this.snapshotRestoreESClient) {
+      this.snapshotRestoreESClient.close();
+    }
   }
 }
diff --git a/x-pack/plugins/transform/server/plugin.ts b/x-pack/plugins/transform/server/plugin.ts
index 7da991bc02b376..c8057a3e2fae11 100644
--- a/x-pack/plugins/transform/server/plugin.ts
+++ b/x-pack/plugins/transform/server/plugin.ts
@@ -6,6 +6,7 @@
 import { i18n } from '@kbn/i18n';
 import {
   CoreSetup,
+  ICustomClusterClient,
   Plugin,
   IScopedClusterClient,
   Logger,
@@ -38,10 +39,18 @@ const PLUGIN = {
     }),
 };
 
+async function getCustomEsClient(getStartServices: CoreSetup['getStartServices']) {
+  const [core] = await getStartServices();
+  return core.elasticsearch.legacy.createClient('transform', {
+    plugins: [elasticsearchJsPlugin],
+  });
+}
+
 export class TransformServerPlugin implements Plugin<{}, void, any, any> {
   private readonly apiRoutes: ApiRoutes;
   private readonly license: License;
   private readonly logger: Logger;
+  private transformESClient?: ICustomClusterClient;
 
   constructor(initContext: PluginInitializerContext) {
     this.logger = initContext.logger.get();
@@ -49,7 +58,7 @@ export class TransformServerPlugin implements Plugin<{}, void, any, any> {
     this.license = new License();
   }
 
-  setup({ elasticsearch, http }: CoreSetup, { licensing }: Dependencies): {} {
+  setup({ http, getStartServices }: CoreSetup, { licensing }: Dependencies): {} {
     const router = http.createRouter();
 
     this.license.setup(
@@ -72,12 +81,11 @@ export class TransformServerPlugin implements Plugin<{}, void, any, any> {
     });
 
     // Can access via new platform router's handler function 'context' parameter - context.transform.client
-    const transformClient = elasticsearch.createClient('transform', {
-      plugins: [elasticsearchJsPlugin],
-    });
-    http.registerRouteHandlerContext('transform', (context, request) => {
+    http.registerRouteHandlerContext('transform', async (context, request) => {
+      this.transformESClient =
+        this.transformESClient ?? (await getCustomEsClient(getStartServices));
       return {
-        dataClient: transformClient.asScoped(request),
+        dataClient: this.transformESClient.asScoped(request),
       };
     });
 
@@ -85,5 +93,10 @@ export class TransformServerPlugin implements Plugin<{}, void, any, any> {
   }
 
   start() {}
-  stop() {}
+
+  stop() {
+    if (this.transformESClient) {
+      this.transformESClient.close();
+    }
+  }
 }
diff --git a/x-pack/plugins/watcher/server/plugin.ts b/x-pack/plugins/watcher/server/plugin.ts
index 6a2e3b2e596b68..3f2891f919e377 100644
--- a/x-pack/plugins/watcher/server/plugin.ts
+++ b/x-pack/plugins/watcher/server/plugin.ts
@@ -12,6 +12,7 @@ declare module 'kibana/server' {
 
 import {
   CoreSetup,
+  ICustomClusterClient,
   IScopedClusterClient,
   Logger,
   Plugin,
@@ -33,8 +34,15 @@ export interface WatcherContext {
   client: IScopedClusterClient;
 }
 
+async function getCustomEsClient(getStartServices: CoreSetup['getStartServices']) {
+  const [core] = await getStartServices();
+  const esConfig = { plugins: [elasticsearchJsPlugin] };
+  return core.elasticsearch.legacy.createClient('watcher', esConfig);
+}
+
 export class WatcherServerPlugin implements Plugin<void, void, any, any> {
-  log: Logger;
+  private readonly log: Logger;
+  private watcherESClient?: ICustomClusterClient;
 
   private licenseStatus: LicenseStatus = {
     hasRequired: false,
@@ -44,21 +52,17 @@ export class WatcherServerPlugin implements Plugin<void, void, any, any> {
     this.log = ctx.logger.get();
   }
 
-  async setup(
-    { http, elasticsearch: elasticsearchService }: CoreSetup,
-    { licensing }: Dependencies
-  ) {
+  async setup({ http, getStartServices }: CoreSetup, { licensing }: Dependencies) {
     const router = http.createRouter();
     const routeDependencies: RouteDependencies = {
       router,
       getLicenseStatus: () => this.licenseStatus,
     };
 
-    const config = { plugins: [elasticsearchJsPlugin] };
-    const watcherESClient = elasticsearchService.createClient('watcher', config);
-    http.registerRouteHandlerContext('watcher', (ctx, request) => {
+    http.registerRouteHandlerContext('watcher', async (ctx, request) => {
+      this.watcherESClient = this.watcherESClient ?? (await getCustomEsClient(getStartServices));
       return {
-        client: watcherESClient.asScoped(request),
+        client: this.watcherESClient.asScoped(request),
       };
     });
 
@@ -89,6 +93,12 @@ export class WatcherServerPlugin implements Plugin<void, void, any, any> {
       }
     });
   }
+
   start() {}
-  stop() {}
+
+  stop() {
+    if (this.watcherESClient) {
+      this.watcherESClient.close();
+    }
+  }
 }