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https://issues.apache.org/jira/browse/HIVE-20737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16648315#comment-16648315
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Denys Kuzmenko commented on HIVE-20737:
---------------------------------------
public void open(HiveConf conf) throws HiveException {
closeLock.readLock().lock();
try {
hiveSparkClient = HiveSparkClientFactory.createHiveSparkClient(conf,
sessionId,
....
}
Double-checked locking should be used, otherwise it might happen than inner
logic of the "open" method will be attempted multiple times. In
LocalHiveSparkClient, "new SparkContext()" will throw exception "Only one
SparkContext may be running in this JVM".
> LocalHiveSparkClient and SparkSession race condition fix
> --------------------------------------------------------
>
> Key: HIVE-20737
> URL: https://issues.apache.org/jira/browse/HIVE-20737
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Reporter: Denys Kuzmenko
> Priority: Major
> Attachments: HIVE-20737.1.patch
>
>
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