Handle exceptions in waitForTemporalServerandLog (#3460)

* Handle exceptions in waitForTemporalServerandLog

* Run gradlew format

Co-authored-by: Abhi Vaidyanatha <abhivaidyanatha@Abhis-MacBook-Pro.local>

airbyte-workers/src/main/java/io/airbyte/workers/temporal/TemporalPool.java

@@ -84,12 +84,21 @@ public void run() {
     factory.start();
   }
 
-  private void waitForTemporalServerAndLog() {
+  protected void waitForTemporalServerAndLog() {
     LOGGER.info("Waiting for temporal server...");
 
-    while (!getNamespaces(temporalService).contains("default")) {
+    boolean temporalStatus = false;
+
+    while (!temporalStatus) {
       LOGGER.warn("Waiting for default namespace to be initialized in temporal...");
       wait(2);
+
+      try {
+        temporalStatus = getNamespaces(temporalService).contains("default");
+      } catch (Exception e) {
+        // Ignore the exception because this likely means that the Temporal service is still initializing.
+        LOGGER.warn("Ignoring exception while trying to request Temporal namespaces:", e);
+      }
     }
 
     // sometimes it takes a few additional seconds for workflow queue listening to be available
@@ -106,7 +115,7 @@ private static void wait(int seconds) {
     }
   }
 
-  private static Set<String> getNamespaces(WorkflowServiceStubs temporalService) {
+  protected static Set<String> getNamespaces(WorkflowServiceStubs temporalService) {
     return temporalService.blockingStub()
         .listNamespaces(ListNamespacesRequest.newBuilder().build())
         .getNamespacesList()

airbyte-workers/src/test/java/io/airbyte/workers/temporal/TemporalPoolTest.java

@@ -0,0 +1,60 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 Airbyte
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.airbyte.workers.temporal;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import io.airbyte.workers.process.ProcessBuilderFactory;
+import io.temporal.api.namespace.v1.NamespaceInfo;
+import io.temporal.api.workflowservice.v1.DescribeNamespaceResponse;
+import io.temporal.serviceclient.WorkflowServiceStubs;
+import java.nio.file.Path;
+import java.util.List;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+class TemporalPoolTest {
+
+  @Test
+  public void testWaitForTemporalServerOnLogThrowsException() {
+    WorkflowServiceStubs workflowServiceStubs = mock(WorkflowServiceStubs.class, Mockito.RETURNS_DEEP_STUBS);
+    Path path = mock(Path.class);
+    ProcessBuilderFactory processBuilderFactory = mock(ProcessBuilderFactory.class);
+    TemporalPool testPool = new TemporalPool(workflowServiceStubs, path, processBuilderFactory);
+    DescribeNamespaceResponse describeNamespaceResponse = mock(DescribeNamespaceResponse.class);
+    NamespaceInfo namespaceInfo = mock(NamespaceInfo.class);
+
+    when(namespaceInfo.getName()).thenReturn("default");
+    when(describeNamespaceResponse.getNamespaceInfo()).thenReturn(namespaceInfo);
+    when(workflowServiceStubs.blockingStub().listNamespaces(any()).getNamespacesList())
+        .thenThrow(RuntimeException.class)
+        .thenReturn(List.of(describeNamespaceResponse));
+    testPool.waitForTemporalServerAndLog();
+  }
+
+}