[ 
https://issues.apache.org/jira/browse/HIVE-21153?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

yx91490 updated HIVE-21153:
---------------------------
    Description: 
It happens occasionally when we run sql in parallel.the reason is HiveConf 
class is not thread safe, and SessionState.createSessionDirs() is not 
Synchronized.

the error message:

java.lang.ArrayIndexOutOfBoundsException: 22
 at java.util.ArrayList.add(ArrayList.java:459)
 at org.apache.hadoop.hive.conf.HiveConf.setupRestrictList(HiveConf.java:3216)
 at org.apache.hadoop.hive.conf.HiveConf.addToRestrictList(HiveConf.java:3191)
 at 
org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:651)
 at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:547)
 at org.apache.hadoop.hive.ql.exec.TaskRunner.run(TaskRunner.java:78)

  was:
java.lang.ArrayIndexOutOfBoundsException: 22
 at java.util.ArrayList.add(ArrayList.java:459)
 at org.apache.hadoop.hive.conf.HiveConf.setupRestrictList(HiveConf.java:3216)
 at org.apache.hadoop.hive.conf.HiveConf.addToRestrictList(HiveConf.java:3191)
 at 
org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:651)
 at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:547)
 at org.apache.hadoop.hive.ql.exec.TaskRunner.run(TaskRunner.java:78)


> task run in parallel cause ArrayIndexOutOfBoundsException
> ---------------------------------------------------------
>
>                 Key: HIVE-21153
>                 URL: https://issues.apache.org/jira/browse/HIVE-21153
>             Project: Hive
>          Issue Type: Bug
>            Reporter: yx91490
>            Priority: Major
>
> It happens occasionally when we run sql in parallel.the reason is HiveConf 
> class is not thread safe, and SessionState.createSessionDirs() is not 
> Synchronized.
> the error message:
> java.lang.ArrayIndexOutOfBoundsException: 22
>  at java.util.ArrayList.add(ArrayList.java:459)
>  at org.apache.hadoop.hive.conf.HiveConf.setupRestrictList(HiveConf.java:3216)
>  at org.apache.hadoop.hive.conf.HiveConf.addToRestrictList(HiveConf.java:3191)
>  at 
> org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:651)
>  at 
> org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:547)
>  at org.apache.hadoop.hive.ql.exec.TaskRunner.run(TaskRunner.java:78)



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