[
https://issues.apache.org/jira/browse/FLINK-8547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16360765#comment-16360765
]
ASF GitHub Bot commented on FLINK-8547:
---------------------------------------
Github user pnowojski commented on a diff in the pull request:
https://github.com/apache/flink/pull/5400#discussion_r167535311
--- Diff:
flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/io/BarrierBufferTest.java
---
@@ -18,1426 +18,40 @@
package org.apache.flink.streaming.runtime.io;
-import org.apache.flink.core.memory.MemorySegment;
-import org.apache.flink.core.memory.MemorySegmentFactory;
-import org.apache.flink.runtime.checkpoint.CheckpointMetaData;
-import org.apache.flink.runtime.checkpoint.CheckpointMetrics;
-import org.apache.flink.runtime.checkpoint.CheckpointOptions;
-import
org.apache.flink.runtime.checkpoint.decline.CheckpointDeclineOnCancellationBarrierException;
-import
org.apache.flink.runtime.checkpoint.decline.CheckpointDeclineSubsumedException;
import org.apache.flink.runtime.io.disk.iomanager.IOManager;
import org.apache.flink.runtime.io.disk.iomanager.IOManagerAsync;
-import org.apache.flink.runtime.io.network.api.CancelCheckpointMarker;
-import org.apache.flink.runtime.io.network.api.CheckpointBarrier;
-import org.apache.flink.runtime.io.network.api.EndOfPartitionEvent;
-import org.apache.flink.runtime.io.network.buffer.Buffer;
-import org.apache.flink.runtime.io.network.buffer.FreeingBufferRecycler;
-import org.apache.flink.runtime.io.network.buffer.NetworkBuffer;
import
org.apache.flink.runtime.io.network.partition.consumer.BufferOrEvent;
-import org.apache.flink.runtime.jobgraph.tasks.AbstractInvokable;
-import org.apache.flink.runtime.operators.testutils.DummyEnvironment;
+import org.apache.flink.runtime.io.network.partition.consumer.InputGate;
-import org.hamcrest.BaseMatcher;
-import org.hamcrest.Description;
+import org.junit.After;
import org.junit.AfterClass;
import org.junit.BeforeClass;
-import org.junit.Test;
import java.io.File;
-import java.util.Arrays;
-import java.util.Random;
+import java.io.IOException;
import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
-import static org.mockito.Matchers.any;
-import static org.mockito.Matchers.anyLong;
-import static org.mockito.Matchers.argThat;
-import static org.mockito.Matchers.eq;
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.times;
-import static org.mockito.Mockito.verify;
/**
- * Tests for the behavior of the {@link BarrierBuffer}.
+ * Tests for the behavior of the {@link BarrierBuffer} with {@link
BufferSpiller}
--- End diff --
nit: Missing period in java doc (build failure).
> Implement CheckpointBarrierHandler not to spill data for exactly-once based
> on credit-based flow control
> --------------------------------------------------------------------------------------------------------
>
> Key: FLINK-8547
> URL: https://issues.apache.org/jira/browse/FLINK-8547
> Project: Flink
> Issue Type: Sub-task
> Components: Network
> Affects Versions: 1.5.0
> Reporter: zhijiang
> Assignee: zhijiang
> Priority: Major
>
> Currently in exactly-once mode, the {{BarrierBuffer}} would block inputs with
> barriers until all inputs have received the barrier for a given checkpoint.
> To avoid back-pressuring the input streams which may cause distributed
> deadlocks, the {{BarrierBuffer}} has to spill the data in disk files to
> recycle the buffers for blocked channels.
>
> Based on credit-based flow control, every channel has exclusive buffers, so
> it is no need to spill data for avoiding deadlock. Then we implement a new
> {{CheckpointBarrierHandler}} for only buffering the data for blocked channels
> for better performance.
>
> And this new {{CheckpointBarrierHandler}} can also be configured to use or
> not in order to rollback the original mode for unexpected risks.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
