feat: add public api to stream writer to set the maximum wait time

google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1/ConnectionWorker.java

@@ -75,7 +75,7 @@ class ConnectionWorker implements AutoCloseable {
    * We will constantly checking how much time we have been waiting for the next request callback
    * if we wait too much time we will start shutting down the connections and clean up the queues.
    */
-  private static Duration MAXIMUM_REQUEST_CALLBACK_WAIT_TIME = Duration.ofMinutes(15);
+  static Duration MAXIMUM_REQUEST_CALLBACK_WAIT_TIME = Duration.ofMinutes(15);
 
   private Lock lock;
   private Condition hasMessageInWaitingQueue;

google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1/StreamWriter.java

@@ -518,6 +518,17 @@ public synchronized TableSchema getUpdatedSchema() {
         : null;
   }
 
+  /**
+   * Sets the maximum time a request is allowed to be waiting in request waiting queue. Under very
+   * low chance, it's possible for append request to be waiting indefintely for request callback
+   * when Google networking SDK does not detect the networking breakage. The default timeout is 15
+   * minutes. We are finding the root cause of the underlying SDK bug for callback not being
+   * triggered.
+   */
+  public static void setMaxInflightRequestWaitTime(Duration waitTime) {
+    ConnectionWorker.MAXIMUM_REQUEST_CALLBACK_WAIT_TIME = waitTime;
+  }
+
   long getCreationTimestamp() {
     return creationTimestamp;
   }

google-cloud-bigquerystorage/src/test/java/com/google/cloud/bigquery/storage/v1/StreamWriterTest.java

@@ -15,6 +15,7 @@
  */
 package com.google.cloud.bigquery.storage.v1;
 
+import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertThrows;
@@ -947,6 +948,35 @@ public void testMessageTooLarge() throws Exception {
     writer.close();
   }
 
+  @Test
+  public void testThrowExceptionWhileWithinAppendLoop_MaxWaitTimeExceed() throws Exception {
+    ProtoSchema schema1 = createProtoSchema("foo");
+    StreamWriter.setMaxInflightRequestWaitTime(java.time.Duration.ofSeconds(1));
+    StreamWriter writer =
+        StreamWriter.newBuilder(TEST_STREAM_1, client).setWriterSchema(schema1).build();
+    testBigQueryWrite.setResponseSleep(org.threeten.bp.Duration.ofSeconds(3));
+
+    long appendCount = 10;
+    for (int i = 0; i < appendCount; i++) {
+      testBigQueryWrite.addResponse(createAppendResponse(i));
+    }
+
+    // In total insert 5 requests,
+    List<ApiFuture<AppendRowsResponse>> futures = new ArrayList<>();
+    for (int i = 0; i < appendCount; i++) {
+      futures.add(writer.append(createProtoRows(new String[] {String.valueOf(i)}), i));
+    }
+
+    for (int i = 0; i < appendCount; i++) {
+      int finalI = i;
+      ExecutionException ex =
+          assertThrows(
+              ExecutionException.class,
+              () -> futures.get(finalI).get().getAppendResult().getOffset().getValue());
+      assertThat(ex.getCause()).hasMessageThat().contains("Request has waited in inflight queue");
+    }
+  }
+
   @Test
   public void testAppendWithResetSuccess() throws Exception {
     try (StreamWriter writer = getTestStreamWriter()) {