[ 
https://issues.apache.org/jira/browse/FLINK-5101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15834416#comment-15834416
 ] 

ASF GitHub Bot commented on FLINK-5101:
---------------------------------------

Github user StephanEwen commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2866#discussion_r97310987
  
    --- Diff: 
flink-streaming-connectors/flink-connector-cassandra/src/test/java/org/apache/flink/streaming/connectors/cassandra/CassandraConnectorITCase.java
 ---
    @@ -371,70 +351,77 @@ public void testCassandraCommitter() throws Exception 
{
     
        @Test
        public void testCassandraTupleAtLeastOnceSink() throws Exception {
    -           StreamExecutionEnvironment env = 
StreamExecutionEnvironment.getExecutionEnvironment();
    -           env.setParallelism(1);
    +           CassandraTupleSink<Tuple3<String, Integer, Integer>> sink = new 
CassandraTupleSink<>(injectTableName(INSERT_DATA_QUERY), builder);
    +
    +           sink.open(new Configuration());
     
    -           DataStream<Tuple3<String, Integer, Integer>> source = 
env.fromCollection(collection);
    -           source.addSink(new CassandraTupleSink<Tuple3<String, Integer, 
Integer>>(INSERT_DATA_QUERY, builder));
    +           for (Tuple3<String, Integer, Integer> value : collection) {
    +                   sink.send(value);
    +           }
     
    -           env.execute();
    +           sink.close();
     
    -           ResultSet rs = session.execute(SELECT_DATA_QUERY);
    +           synchronized (sink.updatesPending) {
    +                   if (sink.updatesPending.get() != 0) {
    +                           sink.updatesPending.wait();
    +                   }
    +           }
    +
    +           ResultSet rs = 
session.execute(injectTableName(SELECT_DATA_QUERY));
                Assert.assertEquals(20, rs.all().size());
        }
     
        @Test
        public void testCassandraPojoAtLeastOnceSink() throws Exception {
    -           StreamExecutionEnvironment env = 
StreamExecutionEnvironment.getExecutionEnvironment();
    -           env.setParallelism(1);
    -
    -           DataStreamSource<Pojo> source = env
    -                   .addSource(new SourceFunction<Pojo>() {
    -
    -                           private boolean running = true;
    -                           private volatile int cnt = 0;
    -
    -                           @Override
    -                           public void run(SourceContext<Pojo> ctx) throws 
Exception {
    -                                   while (running) {
    -                                           ctx.collect(new 
Pojo(UUID.randomUUID().toString(), cnt, 0));
    -                                           cnt++;
    -                                           if (cnt == 20) {
    -                                                   cancel();
    -                                           }
    -                                   }
    -                           }
    +           session.execute(CREATE_TABLE_QUERY.replace(TABLE_NAME_VARIABLE, 
"test"));
     
    -                           @Override
    -                           public void cancel() {
    -                                   running = false;
    -                           }
    -                   });
    +           CassandraPojoSink<Pojo> sink = new 
CassandraPojoSink<>(Pojo.class, builder);
     
    -           source.addSink(new CassandraPojoSink<>(Pojo.class, builder));
    +           sink.open(new Configuration());
     
    -           env.execute();
    +           for (int x = 0; x < 20; x++) {
    +                   sink.send(new Pojo(UUID.randomUUID().toString(), x, 0));
    +           }
    +
    +           sink.close();
    +
    +           synchronized (sink.updatesPending) {
    --- End diff --
    
    Same as above


> Test CassandraConnectorITCase instable
> --------------------------------------
>
>                 Key: FLINK-5101
>                 URL: https://issues.apache.org/jira/browse/FLINK-5101
>             Project: Flink
>          Issue Type: Bug
>          Components: Cassandra Connector
>            Reporter: Stefan Richter
>            Assignee: Chesnay Schepler
>
> I observed this test fail on Travis (very rarely):
>  
>  Running 
> org.apache.flink.streaming.connectors.cassandra.CassandraConnectorITCase
> Tests run: 7, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 80.843 sec 
> <<< FAILURE! - in 
> org.apache.flink.streaming.connectors.cassandra.CassandraConnectorITCase
> testCassandraBatchFormats(org.apache.flink.streaming.connectors.cassandra.CassandraConnectorITCase)
>   Time elapsed: 5.82 sec  <<< FAILURE!
> java.lang.AssertionError: expected:<40> but was:<20>
>       at org.junit.Assert.fail(Assert.java:88)
>       at org.junit.Assert.failNotEquals(Assert.java:834)
>       at org.junit.Assert.assertEquals(Assert.java:645)
>       at org.junit.Assert.assertEquals(Assert.java:631)
>       at 
> org.apache.flink.streaming.connectors.cassandra.CassandraConnectorITCase.testCassandraBatchFormats(CassandraConnectorITCase.java:442)



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