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From "Thejas M Nair (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3815) hive table rename fails if filesystem cache is disabled
Date Thu, 04 Apr 2013 22:24:21 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13622894#comment-13622894
] 

Thejas M Nair commented on HIVE-3815:
-------------------------------------

The root cause of this issue  (copied from the comment in patch) - 
{code}

    //When file system cache is disabled, you get different FileSystem objects
    // for same file system, so '==' can't be used in such cases
    //FileSystem api doesn't have a .equals() function implemented, so using
    //the uri for comparison. FileSystem already uses uri+Configuration for
    //equality in its CACHE .
{code}
                
> hive table rename fails if filesystem cache is disabled
> -------------------------------------------------------
>
>                 Key: HIVE-3815
>                 URL: https://issues.apache.org/jira/browse/HIVE-3815
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Thejas M Nair
>            Assignee: Thejas M Nair
>         Attachments: HIVE-3815.1.patch
>
>
> If fs.<filesyste>.impl.disable.cache  (eg fs.hdfs.impl.disable.cache) is set to
true, then table rename fails.
> The exception that gets thrown (though not logged!) is 
> {quote}
> Caused by: InvalidOperationException(message:table new location hdfs://host1:8020/apps/hive/warehouse/t2
is on a different file system than the old location hdfs://host1:8020/apps/hive/warehouse/t1.
This operation is not supported)
>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$alter_table_result$alter_table_resultStandardScheme.read(ThriftHiveMetastore.java:28825)
>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$alter_table_result$alter_table_resultStandardScheme.read(ThriftHiveMetastore.java:28811)
>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$alter_table_result.read(ThriftHiveMetastore.java:28753)
>         at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.recv_alter_table(ThriftHiveMetastore.java:977)
>         at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.alter_table(ThriftHiveMetastore.java:962)
>         at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.alter_table(HiveMetaStoreClient.java:208)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.invoke(RetryingMetaStoreClient.java:74)
>         at $Proxy7.alter_table(Unknown Source)
>         at org.apache.hadoop.hive.ql.metadata.Hive.alterTable(Hive.java:373)
>         ... 18 more
> {quote}

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