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Posted to dev@hive.apache.org by surendra lilhore <su...@huawei.com> on 2014/04/02 15:42:59 UTC
HiveServer2 : Can we perform parallel operation one same statement
object in JDBC connection ?
Hi all,
I am deleting all table using this code in HiveServer2,
but after deleting all the table hive sever is throwing "Invalid OperationHandle" exception.
ResultSet resultSet = stmt.executeQuery("show tables");
while (resultSet.next()) {
stmt.execute("drop table " + resultSet.getString(1));
}
Same code is working with HiveServer.
In checked code.
HiveServer2 will create new operation handler for "show tables" query,
If I execute "drop table" on same statement object then HiveStatement.execute() will close old operation handler and then it will get new handler,
but HiveQueryResultSet will contain old handler only, again when resultSet.next() fetch new rows from server that time server will throw this exception.
2014-04-02 17:58:18,911 WARN thrift.ThriftCLIService (ThriftCLIService.java:FetchResults(394)) - Error getting result set metadata:
org.apache.hive.service.cli.HiveSQLException: Invalid OperationHandle: OperationHandle [opType=EXECUTE_STATEMENT, getHandleIdentifier()=5edd24f8-3147-4428-9687- bab20db19773]
at org.apache.hive.service.cli.operation.OperationManager.getOperation(OperationManager.java:129)
Can we perform parallel operation one same statement object in JDBC connection ?
Thanks & Regards
Surendra
Re: HiveServer2 : Can we perform parallel operation one same
statement object in JDBC connection ?
Posted by Vaibhav Gumashta <vg...@hortonworks.com>.
Surendra,
In HiveServer2, internally, the HiveStatement object keeps a reference to
the corresponding operation object it created to execute the query. If you
call another execute, it closes the previous operation, thus clearing the
operation handle. Check this line:
https://github.com/apache/hive/blob/trunk/jdbc/src/java/org/apache/hive/jdbc/HiveStatement.java#L216
.
However, in HIVE-6472 <https://issues.apache.org/jira/browse/HIVE-6472>,
we've added support for a parallel cancel, which will let the user cancel a
long running job in another thread.
Thanks,
--Vaibhav
On Wed, Apr 2, 2014 at 9:23 PM, surendra lilhore <
surendra.lilhore@huawei.com> wrote:
> Thanks Xuefu for the reply.
>
> -----Original Message-----
> From: Xuefu Zhang [mailto:xzhang@cloudera.com]
> Sent: 02 April 2014 PM 10:29
> To: dev@hive.apache.org
> Cc: hive-dev@hadoop.apache.org
> Subject: Re: HiveServer2 : Can we perform parallel operation one same
> statement object in JDBC connection ?
>
> Based on my past experience, the answer is "no". You may reuse the
> statement object sequentially, but you cannot do so in a concurrent manner.
>
> --Xuefu
>
>
> On Wed, Apr 2, 2014 at 6:42 AM, surendra lilhore <
> surendra.lilhore@huawei.com> wrote:
>
> > Hi all,
> >
> > I am deleting all table using this code in
> > HiveServer2, but after deleting all the table hive sever is throwing
> > "Invalid OperationHandle" exception.
> >
> > ResultSet resultSet = stmt.executeQuery("show tables");
> > while (resultSet.next()) {
> > stmt.execute("drop table " + resultSet.getString(1));
> > }
> >
> > Same code is working with HiveServer.
> >
> > In checked code.
> >
> > HiveServer2 will create new operation handler for "show tables"
> > query,
> > If I execute "drop table" on same statement object then
> > HiveStatement.execute() will close old operation handler and then it
> > will get new handler, but HiveQueryResultSet will contain old handler
> > only, again when
> > resultSet.next() fetch new rows from server that time server will
> > throw this exception.
> >
> >
> > 2014-04-02 17:58:18,911 WARN thrift.ThriftCLIService
> > (ThriftCLIService.java:FetchResults(394)) - Error getting result set
> > metadata:
> > org.apache.hive.service.cli.HiveSQLException: Invalid OperationHandle:
> > OperationHandle [opType=EXECUTE_STATEMENT,
> > getHandleIdentifier()=5edd24f8-3147-4428-9687- bab20db19773]
> > at
> > org.apache.hive.service.cli.operation.OperationManager.getOperation(Op
> > erationManager.java:129)
> >
> > Can we perform parallel operation one same statement
> > object in JDBC connection ?
> >
> > Thanks & Regards
> > Surendra
> >
>
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RE: HiveServer2 : Can we perform parallel operation one same
statement object in JDBC connection ?
Posted by surendra lilhore <su...@huawei.com>.
Thanks Xuefu for the reply.
-----Original Message-----
From: Xuefu Zhang [mailto:xzhang@cloudera.com]
Sent: 02 April 2014 PM 10:29
To: dev@hive.apache.org
Cc: hive-dev@hadoop.apache.org
Subject: Re: HiveServer2 : Can we perform parallel operation one same statement object in JDBC connection ?
Based on my past experience, the answer is "no". You may reuse the statement object sequentially, but you cannot do so in a concurrent manner.
--Xuefu
On Wed, Apr 2, 2014 at 6:42 AM, surendra lilhore < surendra.lilhore@huawei.com> wrote:
> Hi all,
>
> I am deleting all table using this code in
> HiveServer2, but after deleting all the table hive sever is throwing
> "Invalid OperationHandle" exception.
>
> ResultSet resultSet = stmt.executeQuery("show tables");
> while (resultSet.next()) {
> stmt.execute("drop table " + resultSet.getString(1));
> }
>
> Same code is working with HiveServer.
>
> In checked code.
>
> HiveServer2 will create new operation handler for "show tables"
> query,
> If I execute "drop table" on same statement object then
> HiveStatement.execute() will close old operation handler and then it
> will get new handler, but HiveQueryResultSet will contain old handler
> only, again when
> resultSet.next() fetch new rows from server that time server will
> throw this exception.
>
>
> 2014-04-02 17:58:18,911 WARN thrift.ThriftCLIService
> (ThriftCLIService.java:FetchResults(394)) - Error getting result set
> metadata:
> org.apache.hive.service.cli.HiveSQLException: Invalid OperationHandle:
> OperationHandle [opType=EXECUTE_STATEMENT,
> getHandleIdentifier()=5edd24f8-3147-4428-9687- bab20db19773]
> at
> org.apache.hive.service.cli.operation.OperationManager.getOperation(Op
> erationManager.java:129)
>
> Can we perform parallel operation one same statement
> object in JDBC connection ?
>
> Thanks & Regards
> Surendra
>
Re: HiveServer2 : Can we perform parallel operation one same
statement object in JDBC connection ?
Posted by Xuefu Zhang <xz...@cloudera.com>.
Based on my past experience, the answer is "no". You may reuse the
statement object sequentially, but you cannot do so in a concurrent manner.
--Xuefu
On Wed, Apr 2, 2014 at 6:42 AM, surendra lilhore <
surendra.lilhore@huawei.com> wrote:
> Hi all,
>
> I am deleting all table using this code in HiveServer2,
> but after deleting all the table hive sever is throwing "Invalid
> OperationHandle" exception.
>
> ResultSet resultSet = stmt.executeQuery("show tables");
> while (resultSet.next()) {
> stmt.execute("drop table " + resultSet.getString(1));
> }
>
> Same code is working with HiveServer.
>
> In checked code.
>
> HiveServer2 will create new operation handler for "show tables"
> query,
> If I execute "drop table" on same statement object then
> HiveStatement.execute() will close old operation handler and then it will
> get new handler,
> but HiveQueryResultSet will contain old handler only, again when
> resultSet.next() fetch new rows from server that time server will throw
> this exception.
>
>
> 2014-04-02 17:58:18,911 WARN thrift.ThriftCLIService
> (ThriftCLIService.java:FetchResults(394)) - Error getting result set
> metadata:
> org.apache.hive.service.cli.HiveSQLException: Invalid OperationHandle:
> OperationHandle [opType=EXECUTE_STATEMENT,
> getHandleIdentifier()=5edd24f8-3147-4428-9687- bab20db19773]
> at
> org.apache.hive.service.cli.operation.OperationManager.getOperation(OperationManager.java:129)
>
> Can we perform parallel operation one same statement
> object in JDBC connection ?
>
> Thanks & Regards
> Surendra
>