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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-4863) Querying window store may return unwanted keys
Date Tue, 14 Mar 2017 21:22:41 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-4863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15925032#comment-15925032
] 

ASF GitHub Bot commented on KAFKA-4863:
---------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/kafka/pull/2662


> Querying window store may return unwanted keys
> ----------------------------------------------
>
>                 Key: KAFKA-4863
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4863
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>    Affects Versions: 0.10.2.0
>            Reporter: Xavier Léauté
>            Assignee: Damian Guy
>            Priority: Critical
>
> Using variable length keys in a window store may cause unwanted results to be returned
when querying certain ranges.
> Below is a test case for {{RocksDBWindowStoreTest}} that shows the problem. It fails,
returning {{\[0001, 0003, 0002, 0004, 0005\]}} instead of {{\[0001, 0003, 0005\]}}.
> {code:java}
> @Test
> public void testPutAndFetchSanity() throws IOException {
>     final RocksDBWindowStoreSupplier<String, String> supplier =
>             new RocksDBWindowStoreSupplier<>(
>                     "window", 60 * 1000L * 2, 3,
>                     true, Serdes.String(), Serdes.String(),
>                     windowSize, true, Collections.<String, String>emptyMap(), false
>             );
>     final WindowStore<String, String> store = supplier.get();
>     store.init(context, store);
>     try {
>         store.put("a", "0001", 0);
>         store.put("aa", "0002", 0);
>         store.put("a", "0003", 1);
>         store.put("aa", "0004", 1);
>         store.put("a", "0005", 60000);
>         assertEquals(Utils.mkList("0001", "0003", "0005"), toList(store.fetch("a", 0,
Long.MAX_VALUE)));
>     } finally {
>         store.close();
>     }
> }
> {code}



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