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Posted to issues@kylin.apache.org by "Shaofeng SHI (JIRA)" <ji...@apache.org> on 2017/02/14 10:11:41 UTC
[jira] [Resolved] (KYLIN-2429) Variable initialized should be
declared volatile in SparkCubingByLayer#execute()
[ https://issues.apache.org/jira/browse/KYLIN-2429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Shaofeng SHI resolved KYLIN-2429.
---------------------------------
Resolution: Fixed
> Variable initialized should be declared volatile in SparkCubingByLayer#execute()
> --------------------------------------------------------------------------------
>
> Key: KYLIN-2429
> URL: https://issues.apache.org/jira/browse/KYLIN-2429
> Project: Kylin
> Issue Type: Bug
> Affects Versions: v2.0.0
> Reporter: Ted Yu
> Assignee: Shaofeng SHI
> Fix For: v2.0.0
>
>
> {code}
> final JavaPairRDD<ByteArray, Object[]> encodedBaseRDD = intermediateTable.javaRDD().mapToPair(new PairFunction<Row, ByteArray, Object[]>() {
> transient boolean initialized = false;
> ...
> public Tuple2<ByteArray, Object[]> call(Row row) throws Exception {
> if (initialized == false) {
> synchronized (SparkCubingByLayer.class) {
> if (initialized == false) {
> {code}
> For double checked locking to work, initialized needs to be volatile.
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