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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2021/12/20 15:04:17 UTC
[GitHub] [beam] mosche opened a new pull request #16286: [BEAM-13443] Avoid blocking put to Kinesis records queue to shutdown readers faster
mosche opened a new pull request #16286:
URL: https://github.com/apache/beam/pull/16286
Using `put` on bounded blocking queues is a rather bad practice as it blocks for an unlimited period of time if the capacity is exhausted. Especially when using KPL aggregated records this can easily happen. As a results threads need to be interrupted when forcefully shutting down the reader pool.
This seems to mostly be an issue when using the direct runner as it frequently closes the reader.
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Examples testing status on various runners
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[GitHub] [beam] mosche edited a comment on pull request #16286: [BEAM-13443] Avoid blocking put to Kinesis records queue to shutdown readers faster
Posted by GitBox <gi...@apache.org>.
mosche edited a comment on pull request #16286:
URL: https://github.com/apache/beam/pull/16286#issuecomment-998005452
R: @aromanenko-dev (small fix, should be an easy review)
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[GitHub] [beam] aromanenko-dev merged pull request #16286: [BEAM-13443] Avoid blocking put to Kinesis records queue to shutdown readers faster
Posted by GitBox <gi...@apache.org>.
aromanenko-dev merged pull request #16286:
URL: https://github.com/apache/beam/pull/16286
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[GitHub] [beam] mosche commented on pull request #16286: [BEAM-13443] Avoid blocking put to Kinesis records queue to shutdown readers faster
Posted by GitBox <gi...@apache.org>.
mosche commented on pull request #16286:
URL: https://github.com/apache/beam/pull/16286#issuecomment-998005452
R: @aromanenko-dev
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[GitHub] [beam] aromanenko-dev commented on a change in pull request #16286: [BEAM-13443] Avoid blocking put to Kinesis records queue to shutdown readers faster
Posted by GitBox <gi...@apache.org>.
aromanenko-dev commented on a change in pull request #16286:
URL: https://github.com/apache/beam/pull/16286#discussion_r772506744
##########
File path: sdks/java/io/amazon-web-services2/src/main/java/org/apache/beam/sdk/io/aws2/kinesis/ShardReadersPool.java
##########
@@ -145,8 +148,15 @@ private void readLoop(ShardRecordsIterator shardRecordsIterator, RateLimitPolicy
List<KinesisRecord> kinesisRecords = shardRecordsIterator.readNextBatch();
try {
for (KinesisRecord kinesisRecord : kinesisRecords) {
- recordsQueue.put(kinesisRecord);
- numberOfRecordsInAQueueByShard.get(kinesisRecord.getShardId()).incrementAndGet();
+ while (true) {
+ if (!poolOpened.get()) {
Review comment:
Why do we need to double-check this?
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[GitHub] [beam] mosche commented on a change in pull request #16286: [BEAM-13443] Avoid blocking put to Kinesis records queue to shutdown readers faster
Posted by GitBox <gi...@apache.org>.
mosche commented on a change in pull request #16286:
URL: https://github.com/apache/beam/pull/16286#discussion_r772513555
##########
File path: sdks/java/io/amazon-web-services2/src/main/java/org/apache/beam/sdk/io/aws2/kinesis/ShardReadersPool.java
##########
@@ -145,8 +148,15 @@ private void readLoop(ShardRecordsIterator shardRecordsIterator, RateLimitPolicy
List<KinesisRecord> kinesisRecords = shardRecordsIterator.readNextBatch();
try {
for (KinesisRecord kinesisRecord : kinesisRecords) {
- recordsQueue.put(kinesisRecord);
- numberOfRecordsInAQueueByShard.get(kinesisRecord.getShardId()).incrementAndGet();
+ while (true) {
+ if (!poolOpened.get()) {
Review comment:
Goal here is to stop as soon as possible to not delay shutting down the reader. The loop to enqueue all new record can take very long, especially using aggregated records. Therefore it's important to check if the pool is still open before every new attempt to offer a record to the queue.
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