You are viewing a plain text version of this content. The canonical link for it is here.
Posted to derby-dev@db.apache.org by "Kathey Marsden (JIRA)" <ji...@apache.org> on 2013/01/25 23:23:12 UTC
[jira] [Commented] (DERBY-6054) java.sql.SQLException: Exceeded
maximum number of sections 32k in application with many
setTransactionIsolation statements
[ https://issues.apache.org/jira/browse/DERBY-6054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13563104#comment-13563104 ]
Kathey Marsden commented on DERBY-6054:
---------------------------------------
If the 32K limit on open statements is an arbitrary DRDA limitation, this could possibly be fixed by extending or eliminating that limit in SectionManager. Otherwise, probably fine to just close this not an issue and instruct users to call ResultSet.getStatement().close() to make sure the statements get closed.
> java.sql.SQLException: Exceeded maximum number of sections 32k in application with many setTransactionIsolation statements
> ---------------------------------------------------------------------------------------------------------------------------
>
> Key: DERBY-6054
> URL: https://issues.apache.org/jira/browse/DERBY-6054
> Project: Derby
> Issue Type: Bug
> Components: Network Client
> Affects Versions: 10.8.2.2
> Environment: Linux vm (need to get more details). Problem is particular to this environment and does not fail on other hardware.
> Fri Jan 04 13:41:47 MST 2013:
> Booting Derby version The Apache Software Foundation - Apache Derby - 10.8.2.2 - (1181258): instance a816c00e-013c-074b-
> b72a-000052798332
> sun.misc.Launcher$AppClassLoader@2e502e50
> java.vendor=IBM Corporation
> java.runtime.version=pxi32devifx-20090225 (SR9-0 +IZ44410+IZ44495)
> java.fullversion=J2RE 1.5.0 IBM J9 2.3 Linux x86-32 j9vmxi3223ifx-20090225 (JIT enabled)
> J9VM - 20090224_30451_lHdSMr
> JIT - 20081112_1511ifx1_r8
> GC - 200811_07
> Reporter: Kathey Marsden
>
> An application that uses OpenJPA and WAS gets the exception below.
> java.sql.SQLException: Exceeded maximum number of sections 32k
> at org.apache.derby.client.am.SQLExceptionFactory.getSQLException(Unknown Source)
> at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
> at org.apache.derby.client.am.Statement.executeUpdate(Unknown Source)
> at org.apache.derby.client.am.Connection.setTransactionIsolationX(Unknown Source)
> at org.apache.derby.client.am.Connection.setTransactionIsolation(Unknown Source)
> at org.apache.derby.client.am.LogicalConnection.setTransactionIsolation(Unknown Source)
> at com.ibm.ws.rsadapter.spi.WSRdbManagedConnectionImpl.setTransactionIsolation(WSRdbManagedConnectionImpl.java:4622)
> at com.ibm.ws.rsadapter.jdbc.WSJdbcConnection.setTransactionIsolation(WSJdbcConnection.java:2884)
> at org.apache.openjpa.lib.jdbc.DelegatingConnection.setTransactionIsolation(DelegatingConnection.java:257)
> at org.apache.openjpa.lib.jdbc.DelegatingConnection.setTransactionIsolation(DelegatingConnection.java:257)
> at org.apache.openjpa.lib.jdbc.ConfiguringConnectionDecorator.decorate(ConfiguringConnectionDecorator.java:95)
> at org.apache.openjpa.lib.jdbc.DecoratingDataSource.decorate(DecoratingDataSource.java:100)
> at org.apache.openjpa.lib.jdbc.DecoratingDataSource.getConnection(DecoratingDataSource.java:88)
> at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.connectInternal(JDBCStoreManager.java:879)
> at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.connect(JDBCStoreManager.java:864)
> Looking at the log every time a connection is opened there are two SET CURRENT ISOLATION STATEMENTS, presumably as the isolation is set and then again to reset it for the pool.
> There are exactly 32767 of these for the session before the failure.
> ~/repro/77867,499,000 $grep 'SET CURRENT ISO' derby.log | grep 'Executing' |
> grep 'SESSIONID = 9' | wc
> 32767 983010 8060682
> Only the setTransactionIsolation statements do not seem to be getting garbage collected and teh sections reused. All in all the session has hundreds of thousands of statements that do not have a problem.
> ~/repro/77867,499,000 $ grep 'Executing' derby.log | grep 'SESSIONID = 9' |
> wc
> 364906 30487228 297049149
> Runtimeinfo was not revealing in terms of showing the statements building up. so there is more investigation to do.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira