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Posted to dev@hive.apache.org by "cwalet (JIRA)" <ji...@apache.org> on 2014/04/23 09:02:29 UTC
[jira] [Commented] (HIVE-6179) OOM occurs when query spans to a
large number of partitions
[ https://issues.apache.org/jira/browse/HIVE-6179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13977913#comment-13977913 ]
cwalet commented on HIVE-6179:
------------------------------
hi there,did you got any idea about this issue?
> OOM occurs when query spans to a large number of partitions
> -----------------------------------------------------------
>
> Key: HIVE-6179
> URL: https://issues.apache.org/jira/browse/HIVE-6179
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.12.0
> Reporter: Xuefu Zhang
> Assignee: Xuefu Zhang
>
> When executing a query against a large number of partitions, such as "select count(*) from table", OOM error may occur because Hive fetches the metadata for all partitions involved and tries to store it in memory.
> {code}
> 2014-01-09 13:14:17,090 ERROR metastore.RetryingHMSHandler (RetryingHMSHandler.java:invoke(141)) - java.lang.OutOfMemoryError: Java heap space
> at java.util.Arrays.copyOf(Arrays.java:2367)
> at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:130)
> at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:114)
> at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:415)
> at java.lang.StringBuffer.append(StringBuffer.java:237)
> at org.apache.derby.impl.sql.conn.GenericStatementContext.appendErrorInfo(Unknown Source)
> at org.apache.derby.iapi.services.context.ContextManager.cleanupOnError(Unknown Source)
> at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)
> at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedResultSet.closeOnTransactionError(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedResultSet.movePosition(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedResultSet.next(Unknown Source)
> at org.datanucleus.store.rdbms.query.ForwardQueryResult.nextResultSetElement(ForwardQueryResult.java:191)
> at org.datanucleus.store.rdbms.query.ForwardQueryResult$QueryResultIterator.next(ForwardQueryResult.java:379)
> at org.apache.hadoop.hive.metastore.MetaStoreDirectSql.loopJoinOrderedResult(MetaStoreDirectSql.java:641)
> at org.apache.hadoop.hive.metastore.MetaStoreDirectSql.getPartitionsViaSqlFilterInternal(MetaStoreDirectSql.java:410)
> at org.apache.hadoop.hive.metastore.MetaStoreDirectSql.getPartitions(MetaStoreDirectSql.java:205)
> at org.apache.hadoop.hive.metastore.ObjectStore.getPartitionsInternal(ObjectStore.java:1433)
> at org.apache.hadoop.hive.metastore.ObjectStore.getPartitions(ObjectStore.java:1420)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:601)
> at org.apache.hadoop.hive.metastore.RetryingRawStore.invoke(RetryingRawStore.java:122)
> at com.sun.proxy.$Proxy7.getPartitions(Unknown Source)
> at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.get_partitions(HiveMetaStore.java:2128)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:601)
> at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:103)
> {code}
> The above error happened when executing "select count(*)" on a table with 40K partitions.
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