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commit f4ba4df5824aecfb254591db4958842ae68d707b
Author: Piotr Nowojski <[email protected]>
AuthorDate: Wed Oct 28 14:11:26 2020 +0100

    [hotfix][test] Improve error message in ValidatingCheckpointHandler
---
 .../flink/streaming/runtime/io/ValidatingCheckpointHandler.java     | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git 
a/flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/io/ValidatingCheckpointHandler.java
 
b/flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/io/ValidatingCheckpointHandler.java
index 7f4d4fe..f426289 100644
--- 
a/flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/io/ValidatingCheckpointHandler.java
+++ 
b/flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/io/ValidatingCheckpointHandler.java
@@ -31,6 +31,7 @@ import java.util.List;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Future;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 /**
@@ -106,8 +107,9 @@ public class ValidatingCheckpointHandler extends 
AbstractInvokable {
                        CheckpointMetaData checkpointMetaData,
                        CheckpointOptions checkpointOptions,
                        CheckpointMetricsBuilder checkpointMetrics) {
-               assertTrue("wrong checkpoint id", nextExpectedCheckpointId == 
-1L ||
-                       nextExpectedCheckpointId == 
checkpointMetaData.getCheckpointId());
+               if (nextExpectedCheckpointId != -1L) {
+                       assertEquals(nextExpectedCheckpointId, 
checkpointMetaData.getCheckpointId());
+               }
                assertTrue(checkpointMetaData.getTimestamp() > 0);
 
                nextExpectedCheckpointId = checkpointMetaData.getCheckpointId() 
+ 1;

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