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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 edited comment on HIVE-20737 at 10/13/18 8:50 AM:
-----------------------------------------------------------------
{{{code}}}
public void open(HiveConf conf) throws HiveException {
closeLock.readLock().lock();
try {
...
hiveSparkClient = HiveSparkClientFactory.createHiveSparkClient(conf,
sessionId,
....
}
{{{code}}}
Double-checked locking should be used, otherwise, it might happen, than inner
logic of the "open" method will be attempted multiple times and initiate
several SparkContexts within the same Spark session. LocalHiveSparkClient, "new
SparkContext()" will throw exception "Only one SparkContext may be running in
this JVM".
was (Author: dkuzmenko):
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 and initiate
several SparkContexts within the same Spark session. 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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