[GitHub] dawidwys closed pull request #6896: [FLINK-10570] Fixed clearing shared buffer nodes when using After match skip strategy

[GitBox]

dawidwys closed pull request #6896: [FLINK-10570] Fixed clearing shared buffer 
nodes when using After match skip strategy
URL: https://github.com/apache/flink/pull/6896
 
 
   

This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:

As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):

diff --git 
a/flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/nfa/NFA.java 
b/flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/nfa/NFA.java
index f5e89d705b8..01dcfd97eb4 100644
--- a/flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/nfa/NFA.java
+++ b/flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/nfa/NFA.java
@@ -389,6 +389,7 @@ private void processMatchesAccordingToSkipStrategy(
                                        sharedBufferAccessor);
 
                                
result.add(sharedBufferAccessor.materializeMatch(matchedResult.get(0)));
+                               
sharedBufferAccessor.releaseNode(earliestMatch.getPreviousBufferEntry());
                                earliestMatch = 
nfaState.getCompletedMatches().peek();
                        }
 
diff --git 
a/flink-libraries/flink-cep/src/test/java/org/apache/flink/cep/nfa/AfterMatchSkipITCase.java
 
b/flink-libraries/flink-cep/src/test/java/org/apache/flink/cep/nfa/AfterMatchSkipITCase.java
index d42839e3071..239dd4f4857 100644
--- 
a/flink-libraries/flink-cep/src/test/java/org/apache/flink/cep/nfa/AfterMatchSkipITCase.java
+++ 
b/flink-libraries/flink-cep/src/test/java/org/apache/flink/cep/nfa/AfterMatchSkipITCase.java
@@ -20,15 +20,20 @@
 
 import org.apache.flink.cep.Event;
 import org.apache.flink.cep.nfa.aftermatch.AfterMatchSkipStrategy;
+import org.apache.flink.cep.nfa.aftermatch.SkipPastLastStrategy;
+import org.apache.flink.cep.nfa.sharedbuffer.SharedBuffer;
+import org.apache.flink.cep.nfa.sharedbuffer.SharedBufferAccessor;
 import org.apache.flink.cep.pattern.Pattern;
 import org.apache.flink.cep.pattern.conditions.IterativeCondition;
 import org.apache.flink.cep.pattern.conditions.SimpleCondition;
+import org.apache.flink.cep.utils.TestSharedBuffer;
 import org.apache.flink.streaming.runtime.streamrecord.StreamRecord;
 import org.apache.flink.util.FlinkRuntimeException;
 import org.apache.flink.util.TestLogger;
 
 import org.apache.flink.shaded.guava18.com.google.common.collect.Lists;
 
+import org.hamcrest.Matchers;
 import org.junit.Test;
 
 import java.util.ArrayList;
@@ -38,6 +43,7 @@
 import static org.apache.flink.cep.nfa.NFATestUtilities.compareMaps;
 import static org.apache.flink.cep.nfa.NFATestUtilities.feedNFA;
 import static org.apache.flink.cep.utils.NFAUtils.compile;
+import static org.junit.Assert.assertThat;
 
 /**
  * IT tests covering {@link AfterMatchSkipStrategy}.
@@ -936,4 +942,43 @@ public boolean filter(Event value, Context<Event> ctx) 
throws Exception {
                        Lists.newArrayList(a2, c2, b1)
                ));
        }
+
+       @Test
+       public void testSharedBufferIsProperlyCleared() throws Exception {
+               List<StreamRecord<Event>> inputEvents = new ArrayList<>();
+
+               for (int i = 0; i < 4; i++) {
+                       inputEvents.add(new StreamRecord<>(new Event(1, "a", 
1.0), i));
+               }
+
+               SkipPastLastStrategy matchSkipStrategy = 
AfterMatchSkipStrategy.skipPastLastEvent();
+               Pattern<Event, ?> pattern = Pattern.<Event>begin("start", 
matchSkipStrategy)
+                       .where(new SimpleCondition<Event>() {
+                               private static final long serialVersionUID = 
5726188262756267490L;
+
+                               @Override
+                               public boolean filter(Event value) throws 
Exception {
+                                       return true;
+                               }
+                       }).times(2);
+
+               NFA<Event> nfa = compile(pattern, false);
+
+               SharedBuffer<Event> sharedBuffer = 
TestSharedBuffer.createTestBuffer(Event.createTypeSerializer());
+               NFAState nfaState = nfa.createInitialNFAState();
+
+               for (StreamRecord<Event> inputEvent : inputEvents) {
+                       try (SharedBufferAccessor<Event> sharedBufferAccessor = 
sharedBuffer.getAccessor()) {
+                               nfa.advanceTime(sharedBufferAccessor, nfaState, 
inputEvent.getTimestamp());
+                               nfa.process(
+                                       sharedBufferAccessor,
+                                       nfaState,
+                                       inputEvent.getValue(),
+                                       inputEvent.getTimestamp(),
+                                       matchSkipStrategy);
+                       }
+               }
+
+               assertThat(sharedBuffer.isEmpty(), Matchers.is(true));
+       }
 }


 

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org


With regards,
Apache Git Services