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From "Pengcheng Xiong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11224) AggregateStatsCache triggers java.util.ConcurrentModificationException under some conditions
Date Fri, 10 Jul 2015 04:53:05 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14621721#comment-14621721
] 

Pengcheng Xiong commented on HIVE-11224:
----------------------------------------

As per [~jpullokkaran]'s request, could [~thejas] and [~vgumashta] take a look? It is related
to the HIVE-HIVE-10382, AggregateStatsCache work. Thanks.

> AggregateStatsCache triggers java.util.ConcurrentModificationException under some conditions
> --------------------------------------------------------------------------------------------
>
>                 Key: HIVE-11224
>                 URL: https://issues.apache.org/jira/browse/HIVE-11224
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>         Attachments: HIVE-11224.01.patch
>
>
> Stack
> {code}
> java.util.ConcurrentModificationException
>         at java.util.HashMap$HashIterator.nextEntry(HashMap.java:922)
>         at java.util.HashMap$EntryIterator.next(HashMap.java:962)
>         at java.util.HashMap$EntryIterator.next(HashMap.java:960)
>         at org.apache.hadoop.hive.metastore.AggregateStatsCache.findBestMatch(AggregateStatsCache.java:244)
>         at org.apache.hadoop.hive.metastore.AggregateStatsCache.get(AggregateStatsCache.java:186)
>         at org.apache.hadoop.hive.metastore.MetaStoreDirectSql.aggrColStatsForPartitions(MetaStoreDirectSql.java:1131)
>         at org.apache.hadoop.hive.metastore.ObjectStore$9.getSqlResult(ObjectStore.java:6174)
>         at org.apache.hadoop.hive.metastore.ObjectStore$9.getSqlResult(ObjectStore.java:6170)
>         at org.apache.hadoop.hive.metastore.ObjectStore$GetHelper.run(ObjectStore.java:2405)
>         at org.apache.hadoop.hive.metastore.ObjectStore.get_aggr_stats_for(ObjectStore.java:6170)
>         at sun.reflect.GeneratedMethodAccessor103.invoke(Unknown Source)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:606)
>         at org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:114)
>         at com.sun.proxy.$Proxy6.get_aggr_stats_for(Unknown Source)
>         at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.get_aggr_stats_for(HiveMetaStore.java:5707)
>         at sun.reflect.GeneratedMethodAccessor102.invoke(Unknown Source)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:606)
>         at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:107)
>         at com.sun.proxy.$Proxy8.get_aggr_stats_for(Unknown Source)
>         at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getAggrColStatsFor(HiveMetaStoreClient.java:2067)
>         at sun.reflect.GeneratedMethodAccessor101.invoke(Unknown Source)
> {code}



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