abbccdda commented on a change in pull request #9047:
URL: https://github.com/apache/kafka/pull/9047#discussion_r460165601


##########
File path: docs/streams/developer-guide/config-streams.html
##########
@@ -326,13 +321,18 @@ <h4><a class="toc-backref" 
href="#id5">bootstrap.servers</a><a class="headerlink
           <tr class="row-even"><td>state.cleanup.delay.ms</td>
             <td>Low</td>
             <td colspan="2">The amount of time in milliseconds to wait before 
deleting state when a partition has migrated.</td>
-            <td>600000 milliseconds</td>
+            <td>600000 milliseconds (10 minutes)</td>
           </tr>
           <tr class="row-odd"><td>state.dir</td>
             <td>High</td>
             <td colspan="2">Directory location for state stores.</td>
             <td><code class="docutils literal"><span 
class="pre">/tmp/kafka-streams</span></code></td>
           </tr>
+          <tr class="row-odd"><td>task.timeout.ms</td>
+            <td>Medium</td>

Review comment:
       nit: for a doc clean-up, it is helpful to include a screenshot of 
updated paragraph. The changes starting at L331 should be suffice.

##########
File path: 
streams/src/main/java/org/apache/kafka/streams/processor/internals/GlobalStateManagerImpl.java
##########
@@ -318,6 +341,72 @@ private void restoreState(final StateRestoreCallback 
stateRestoreCallback,
         }
     }
 
+    private void retryUntilSuccessOrThrowOnTaskTimeout(final Runnable runnable,
+                                                       final String 
errorMessage) {
+        long deadlineMs = NO_DEADLINE;
+
+        do {
+            try {
+                runnable.run();
+                return;
+            } catch (final TimeoutException retryableException) {

Review comment:
       `retriableException` to be consistent with the defined exception type in 
AK.

##########
File path: 
streams/src/main/java/org/apache/kafka/streams/processor/internals/GlobalStateManagerImpl.java
##########
@@ -275,31 +259,70 @@ private void restoreState(final StateRestoreCallback 
stateRestoreCallback,
                               final RecordConverter recordConverter) {
         for (final TopicPartition topicPartition : topicPartitions) {
             globalConsumer.assign(Collections.singletonList(topicPartition));
+            long offset;
             final Long checkpoint = checkpointFileCache.get(topicPartition);
             if (checkpoint != null) {
                 globalConsumer.seek(topicPartition, checkpoint);
+                offset = checkpoint;
             } else {
                 
globalConsumer.seekToBeginning(Collections.singletonList(topicPartition));
+                final AtomicLong position = new AtomicLong();

Review comment:
       For the above call, was curious why we couldn't seek for all the topic 
partitions that are missing positions here, instead of doing one by one look-up?

##########
File path: 
streams/src/main/java/org/apache/kafka/streams/internals/QuietStreamsConfig.java
##########
@@ -1,33 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF 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.
- */
-package org.apache.kafka.streams.internals;
-
-import org.apache.kafka.streams.StreamsConfig;
-
-import java.util.Map;
-
-/**
- * A {@link StreamsConfig} that does not log its configuration on construction.
- *
- * This producer cleaner output for unit tests using the {@code test-utils},
- * since logging the config is not really valuable in this context.
- */
-public class QuietStreamsConfig extends StreamsConfig {

Review comment:
       What's the purpose for this move?

##########
File path: 
streams/src/main/java/org/apache/kafka/streams/processor/internals/GlobalStateManagerImpl.java
##########
@@ -275,31 +259,70 @@ private void restoreState(final StateRestoreCallback 
stateRestoreCallback,
                               final RecordConverter recordConverter) {
         for (final TopicPartition topicPartition : topicPartitions) {
             globalConsumer.assign(Collections.singletonList(topicPartition));
+            long offset;
             final Long checkpoint = checkpointFileCache.get(topicPartition);
             if (checkpoint != null) {
                 globalConsumer.seek(topicPartition, checkpoint);
+                offset = checkpoint;
             } else {
                 
globalConsumer.seekToBeginning(Collections.singletonList(topicPartition));
+                final AtomicLong position = new AtomicLong();
+                retryUntilSuccessOrThrowOnTaskTimeout(
+                    () -> 
position.set(globalConsumer.position(topicPartition)),
+                    String.format(
+                        "Failed to get position for partition %s. The broker 
may be transiently unavailable at the moment.",
+                        topicPartition
+                    )
+                );
+                offset = position.get();
             }
 
-            long offset = globalConsumer.position(topicPartition);
             final Long highWatermark = highWatermarks.get(topicPartition);
             final RecordBatchingStateRestoreCallback stateRestoreAdapter =
                 StateRestoreCallbackAdapter.adapt(stateRestoreCallback);
 
             stateRestoreListener.onRestoreStart(topicPartition, storeName, 
offset, highWatermark);
             long restoreCount = 0L;
 
+            long deadlineMs = NO_DEADLINE;
             while (offset < highWatermark) {
                 try {
                     final ConsumerRecords<byte[], byte[]> records = 
globalConsumer.poll(pollTime);
+                    if (records.isEmpty()) {
+                        if (taskTimeoutMs == 0L) {
+                            deadlineMs = maybeUpdateDeadlineOrThrow(
+                                deadlineMs,
+                                requestTimeoutMs,
+                                new StreamsException(String.format(
+                                    "Global task did not make progress to 
restore state. Retrying is disabled. You can enable it by setting `%s` to a 
value larger than zero.",
+                                    StreamsConfig.TASK_TIMEOUT_MS_CONFIG
+                                ))
+                            );
+                        } else {
+                            deadlineMs = 
maybeUpdateDeadlineOrThrow(deadlineMs);
+                        }
+
+                        continue;
+                    }
+                    deadlineMs = NO_DEADLINE;
+
                     final List<ConsumerRecord<byte[], byte[]>> restoreRecords 
= new ArrayList<>();
                     for (final ConsumerRecord<byte[], byte[]> record : 
records.records(topicPartition)) {
                         if (record.key() != null) {
                             
restoreRecords.add(recordConverter.convert(record));
                         }
                     }
-                    offset = globalConsumer.position(topicPartition);
+                    try {
+                        offset = globalConsumer.position(topicPartition);
+                    } catch (final TimeoutException error) {
+                        // the `globalConsumer.position()` call should never 
block, because we know that we did
+                        // a successful `position()` call above for the 
requested partition and thus the consumer
+                        // should have a valid local position that it can 
return immediately
+
+                        // hence, a `TimeoutException` indicates a bug and 
thus we rethrow it as fatal `IllegalStateException`
+                        throw new IllegalStateException(error);

Review comment:
       We should add some explanation in the illegal state exception for why 
such timeout is fatal

##########
File path: 
streams/src/main/java/org/apache/kafka/streams/processor/internals/GlobalStateManagerImpl.java
##########
@@ -318,6 +341,72 @@ private void restoreState(final StateRestoreCallback 
stateRestoreCallback,
         }
     }
 
+    private void retryUntilSuccessOrThrowOnTaskTimeout(final Runnable runnable,
+                                                       final String 
errorMessage) {
+        long deadlineMs = NO_DEADLINE;
+
+        do {
+            try {
+                runnable.run();
+                return;
+            } catch (final TimeoutException retryableException) {
+                if (taskTimeoutMs == 0L) {
+                    throw new StreamsException(
+                        String.format(
+                            "Retrying is disabled. You can enable it by 
setting `%s` to a value larger than zero.",
+                            StreamsConfig.TASK_TIMEOUT_MS_CONFIG
+                        ),
+                        retryableException
+                    );
+                }
+
+                deadlineMs = maybeUpdateDeadlineOrThrow(deadlineMs);
+
+                log.debug(errorMessage, retryableException);

Review comment:
       Should we log warning here instead? At least this is a timeout.

##########
File path: 
streams/src/main/java/org/apache/kafka/streams/processor/internals/GlobalStateManagerImpl.java
##########
@@ -299,7 +318,17 @@ private void restoreState(final StateRestoreCallback 
stateRestoreCallback,
                             
restoreRecords.add(recordConverter.convert(record));
                         }
                     }
-                    offset = globalConsumer.position(topicPartition);
+                    try {
+                        offset = globalConsumer.position(topicPartition);
+                    } catch (final TimeoutException error) {
+                        // the `globalConsumer.position()` call should never 
block, because we know that we did
+                        // a successful `position()` call above for the 
requested partition and thus the consumer
+                        // should have a valid local position that it can 
return immediately

Review comment:
       If we do have a valid position from previous `position` call, do we 
still need to update the position here again?

##########
File path: streams/src/test/java/org/apache/kafka/test/NoOpReadOnlyStore.java
##########
@@ -78,6 +78,7 @@ public void init(final ProcessorContext context, final 
StateStore root) {
             new File(context.stateDir() + File.separator + name).mkdir();
         }
         this.initialized = true;
+        context.register(root, (k, v) -> { });

Review comment:
       Why do we need this?




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