migrate retryCallCluster for new ES client

src/core/server/elasticsearch/client/index.ts

@@ -22,3 +22,4 @@ export { IScopedClusterClient, ScopedClusterClient } from './scoped_cluster_clie
 export { ElasticsearchClientConfig } from './client_config';
 export { IClusterClient, ICustomClusterClient, ClusterClient } from './cluster_client';
 export { configureClient } from './configure_client';
+export { retryCallCluster, migrationRetryCallCluster } from './retry_call_cluster';

src/core/server/elasticsearch/client/retry_call_cluster.test.ts

@@ -0,0 +1,283 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import { errors } from '@elastic/elasticsearch';
+import { elasticsearchClientMock } from './mocks';
+import { loggingSystemMock } from '../../logging/logging_system.mock';
+import { retryCallCluster, migrationRetryCallCluster } from './retry_call_cluster';
+
+const dummyBody = { foo: 'bar' };
+const createErrorReturn = (err: any) => elasticsearchClientMock.createClientError(err);
+
+describe('retryCallCluster', () => {
+  let client: ReturnType<typeof elasticsearchClientMock.createElasticSearchClient>;
+
+  beforeEach(() => {
+    client = elasticsearchClientMock.createElasticSearchClient();
+  });
+
+  it('returns response from ES API call in case of success', async () => {
+    const successReturn = elasticsearchClientMock.createClientResponse({ ...dummyBody });
+
+    client.asyncSearch.get.mockReturnValue(successReturn);
+
+    const result = await retryCallCluster(() => client.asyncSearch.get());
+    expect(result.body).toEqual(dummyBody);
+  });
+
+  it('retries ES API calls that rejects with `NoLivingConnectionsError`', async () => {
+    const successReturn = elasticsearchClientMock.createClientResponse({ ...dummyBody });
+
+    client.asyncSearch.get
+      .mockImplementationOnce(() =>
+        createErrorReturn(new errors.NoLivingConnectionsError('no living connections', {} as any))
+      )
+      .mockImplementationOnce(() => successReturn);
+
+    const result = await retryCallCluster(() => client.asyncSearch.get());
+    expect(result.body).toEqual(dummyBody);
+  });
+
+  it('rejects when ES API calls reject with other errors', async () => {
+    client.ping
+      .mockImplementationOnce(() => createErrorReturn(new Error('unknown error')))
+      .mockImplementationOnce(() => elasticsearchClientMock.createClientResponse({ ...dummyBody }));
+
+    await expect(retryCallCluster(() => client.ping())).rejects.toMatchInlineSnapshot(
+      `[Error: unknown error]`
+    );
+  });
+
+  it('stops retrying when ES API calls reject with other errors', async () => {
+    client.ping
+      .mockImplementationOnce(() =>
+        createErrorReturn(new errors.NoLivingConnectionsError('no living connections', {} as any))
+      )
+      .mockImplementationOnce(() =>
+        createErrorReturn(new errors.NoLivingConnectionsError('no living connections', {} as any))
+      )
+      .mockImplementationOnce(() => createErrorReturn(new Error('unknown error')))
+      .mockImplementationOnce(() => elasticsearchClientMock.createClientResponse({ ...dummyBody }));
+
+    await expect(retryCallCluster(() => client.ping())).rejects.toMatchInlineSnapshot(
+      `[Error: unknown error]`
+    );
+  });
+});
+
+describe('migrationRetryCallCluster', () => {
+  let client: ReturnType<typeof elasticsearchClientMock.createElasticSearchClient>;
+  let logger: ReturnType<typeof loggingSystemMock.createLogger>;
+
+  beforeEach(() => {
+    client = elasticsearchClientMock.createElasticSearchClient();
+    logger = loggingSystemMock.createLogger();
+  });
+
+  const mockClientPingWithErrorBeforeSuccess = (error: any) => {
+    client.ping
+      .mockImplementationOnce(() => createErrorReturn(error))
+      .mockImplementationOnce(() => createErrorReturn(error))
+      .mockImplementationOnce(() => elasticsearchClientMock.createClientResponse({ ...dummyBody }));
+  };
+
+  it('retries ES API calls that rejects with `NoLivingConnectionsError`', async () => {
+    mockClientPingWithErrorBeforeSuccess(
+      new errors.NoLivingConnectionsError('no living connections', {} as any)
+    );
+
+    const result = await migrationRetryCallCluster(() => client.ping(), logger, 1);
+    expect(result.body).toEqual(dummyBody);
+  });
+
+  it('retries ES API calls that rejects with `ConnectionError`', async () => {
+    mockClientPingWithErrorBeforeSuccess(new errors.ConnectionError('connection error', {} as any));
+
+    const result = await migrationRetryCallCluster(() => client.ping(), logger, 1);
+    expect(result.body).toEqual(dummyBody);
+  });
+
+  it('retries ES API calls that rejects with `TimeoutError`', async () => {
+    mockClientPingWithErrorBeforeSuccess(new errors.TimeoutError('timeout error', {} as any));
+
+    const result = await migrationRetryCallCluster(() => client.ping(), logger, 1);
+    expect(result.body).toEqual(dummyBody);
+  });
+
+  it('retries ES API calls that rejects with 503 `ResponseError`', async () => {
+    mockClientPingWithErrorBeforeSuccess(
+      new errors.ResponseError({
+        statusCode: 503,
+      } as any)
+    );
+
+    const result = await migrationRetryCallCluster(() => client.ping(), logger, 1);
+    expect(result.body).toEqual(dummyBody);
+  });
+
+  it('retries ES API calls that rejects 401 `ResponseError`', async () => {
+    mockClientPingWithErrorBeforeSuccess(
+      new errors.ResponseError({
+        statusCode: 401,
+      } as any)
+    );
+
+    const result = await migrationRetryCallCluster(() => client.ping(), logger, 1);
+    expect(result.body).toEqual(dummyBody);
+  });
+
+  it('retries ES API calls that rejects with 403 `ResponseError`', async () => {
+    mockClientPingWithErrorBeforeSuccess(
+      new errors.ResponseError({
+        statusCode: 403,
+      } as any)
+    );
+
+    const result = await migrationRetryCallCluster(() => client.ping(), logger, 1);
+    expect(result.body).toEqual(dummyBody);
+  });
+
+  it('retries ES API calls that rejects with 408 `ResponseError`', async () => {
+    mockClientPingWithErrorBeforeSuccess(
+      new errors.ResponseError({
+        statusCode: 408,
+      } as any)
+    );
+
+    const result = await migrationRetryCallCluster(() => client.ping(), logger, 1);
+    expect(result.body).toEqual(dummyBody);
+  });
+
+  it('retries ES API calls that rejects with 410 `ResponseError`', async () => {
+    mockClientPingWithErrorBeforeSuccess(
+      new errors.ResponseError({
+        statusCode: 410,
+      } as any)
+    );
+
+    const result = await migrationRetryCallCluster(() => client.ping(), logger, 1);
+    expect(result.body).toEqual(dummyBody);
+  });
+
+  it('retries ES API calls that rejects with `snapshot_in_progress_exception` `ResponseError`', async () => {
+    mockClientPingWithErrorBeforeSuccess(
+      new errors.ResponseError({
+        statusCode: 500,
+        body: {
+          error: {
+            type: 'snapshot_in_progress_exception',
+          },
+        },
+      } as any)
+    );
+
+    const result = await migrationRetryCallCluster(() => client.ping(), logger, 1);
+    expect(result.body).toEqual(dummyBody);
+  });
+
+  it('logs only once for each unique error message', async () => {
+    client.ping
+      .mockImplementationOnce(() =>
+        createErrorReturn(
+          new errors.ResponseError({
+            statusCode: 503,
+          } as any)
+        )
+      )
+      .mockImplementationOnce(() =>
+        createErrorReturn(new errors.ConnectionError('connection error', {} as any))
+      )
+      .mockImplementationOnce(() =>
+        createErrorReturn(
+          new errors.ResponseError({
+            statusCode: 503,
+          } as any)
+        )
+      )
+      .mockImplementationOnce(() =>
+        createErrorReturn(new errors.ConnectionError('connection error', {} as any))
+      )
+      .mockImplementationOnce(() =>
+        createErrorReturn(
+          new errors.ResponseError({
+            statusCode: 500,
+            body: {
+              error: {
+                type: 'snapshot_in_progress_exception',
+              },
+            },
+          } as any)
+        )
+      )
+      .mockImplementationOnce(() => elasticsearchClientMock.createClientResponse({ ...dummyBody }));
+
+    await migrationRetryCallCluster(() => client.ping(), logger, 1);
+
+    expect(loggingSystemMock.collect(logger).warn).toMatchInlineSnapshot(`
+      Array [
+        Array [
+          "Unable to connect to Elasticsearch. Error: Response Error",
+        ],
+        Array [
+          "Unable to connect to Elasticsearch. Error: connection error",
+        ],
+        Array [
+          "Unable to connect to Elasticsearch. Error: snapshot_in_progress_exception",
+        ],
+      ]
+    `);
+  });
+
+  it('rejects when ES API calls reject with other errors', async () => {
+    client.ping
+      .mockImplementationOnce(() =>
+        createErrorReturn(
+          new errors.ResponseError({
+            statusCode: 418,
+            body: {
+              error: {
+                type: `I'm a teapot`,
+              },
+            },
+          } as any)
+        )
+      )
+      .mockImplementationOnce(() => elasticsearchClientMock.createClientResponse({ ...dummyBody }));
+
+    await expect(
+      migrationRetryCallCluster(() => client.ping(), logger, 1)
+    ).rejects.toMatchInlineSnapshot(`[ResponseError: I'm a teapot]`);
+  });
+
+  it('stops retrying when ES API calls reject with other errors', async () => {
+    client.ping
+      .mockImplementationOnce(() =>
+        createErrorReturn(new errors.TimeoutError('timeout error', {} as any))
+      )
+      .mockImplementationOnce(() =>
+        createErrorReturn(new errors.TimeoutError('timeout error', {} as any))
+      )
+      .mockImplementationOnce(() => createErrorReturn(new Error('unknown error')))
+      .mockImplementationOnce(() => elasticsearchClientMock.createClientResponse({ ...dummyBody }));
+
+    await expect(
+      migrationRetryCallCluster(() => client.ping(), logger, 1)
+    ).rejects.toMatchInlineSnapshot(`[Error: unknown error]`);
+  });
+});

src/core/server/elasticsearch/client/retry_call_cluster.ts

@@ -0,0 +1,103 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import { defer, throwError, iif, timer } from 'rxjs';
+import { concatMap, retryWhen } from 'rxjs/operators';
+import { Logger } from '../../logging';
+
+const retryResponseStatuses = [
+  503, // ServiceUnavailable
+  401, // AuthorizationException
+  403, // AuthenticationException
+  408, // RequestTimeout
+  410, // Gone
+];
+
+/**
+ * Retries the provided Elasticsearch API call when a `NoLivingConnectionsError` error is
+ * encountered. The API call will be retried once a second, indefinitely, until
+ * a successful response or a different error is received.
+ *
+ * @example
+ * ```ts
+ * const response = await retryCallCluster(() => client.ping());
+ * ```
+ *
+ * @internal
+ */
+export const retryCallCluster = <T extends Promise<unknown>>(apiCaller: () => T): T => {
+  return defer(() => apiCaller())
+    .pipe(
+      retryWhen((errors) =>
+        errors.pipe(
+          concatMap((error) =>
+            iif(() => error.name === 'NoLivingConnectionsError', timer(1000), throwError(error))
+          )
+        )
+      )
+    )
+    .toPromise() as T;
+};
+
+/**
+ * Retries the provided Elasticsearch API call when an error such as
+ * `AuthenticationException` `NoConnections`, `ConnectionFault`,
+ * `ServiceUnavailable` or `RequestTimeout` are encountered. The API call will
+ * be retried once a second, indefinitely, until a successful response or a
+ * different error is received.
+ *
+ * @example
+ * ```ts
+ * const response = await migrationRetryCallCluster(() => client.ping(), logger);
+ * ```
+ *
+ * @internal
+ */
+export const migrationRetryCallCluster = <T extends Promise<unknown>>(
+  apiCaller: () => T,
+  log: Logger,
+  delay: number = 2500
+): T => {
+  const previousErrors: string[] = [];
+  return defer(() => apiCaller())
+    .pipe(
+      retryWhen((errors) =>
+        errors.pipe(
+          concatMap((error) => {
+            if (!previousErrors.includes(error.message)) {
+              log.warn(`Unable to connect to Elasticsearch. Error: ${error.message}`);
+              previousErrors.push(error.message);
+            }
+            return iif(
+              () =>
+                error.name === 'NoLivingConnectionsError' ||
+                error.name === 'ConnectionError' ||
+                error.name === 'TimeoutError' ||
+                (error.name === 'ResponseError' &&
+                  retryResponseStatuses.includes(error.statusCode)) ||
+                error?.body?.error?.type === 'snapshot_in_progress_exception',
+              timer(delay),
+              throwError(error)
+            );
+          })
+        )
+      )
+    )
+    .toPromise() as T;
+};