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https://issues.apache.org/jira/browse/IBATIS-464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12709510#action_12709510
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Kai Grabfelder commented on IBATIS-464:
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what do you mean oyu get similar error message? Please post a stacktrace.
Furthermore you should use inject the datasource into the
sqlmapclientfactorybean. There should be no need for you to have a datasource
in your DAOs
> iBatis throws a NPE when performing a sub-select in a resultMap.
> ----------------------------------------------------------------
>
> Key: IBATIS-464
> URL: https://issues.apache.org/jira/browse/IBATIS-464
> Project: iBatis for Java
> Issue Type: Bug
> Components: SQL Maps
> Affects Versions: 2.2.0, 2.3.0
> Environment: WinXP, Java 1.5, originally discovered when moving to
> Spring 2.0.6 (spring-ibatis depends on ibatis 2.3.0)
> Reporter: Mitchell L. Waters III
> Priority: Blocker
>
> iBatis throws a NullPointerException when performing a sub-select in a
> resultMap.
> For some foo record in the DB, there are a variable number of comments.
> iBatis allows the user to return an object that contains the information from
> the foo table and return the list/array/collection of related items (comments
> in this example) from a separate table that relate to the foo record, using a
> resultMap like what is listed below.
> <resultMap class="test.FooDto" id="fooResult">
> <result property="foo" column="foo" />
> <result property="bar" column="bar" />
> <result property="comments" select="getCommentList" column="{foo=foo}"
> />
> </resultMap>
> This works without a hitch in iBatis 2.1.7. However when you attempt to do
> the same in iBatis 2.2.0 or 2.3.0, you get a NPE (stack trace to follow).
> Digging in a bit, it seems that the session returned to do the SessionScope
> that is returned for the sub-select is different than that used to run the
> original select (different than the behavior in 2.1.7) and that the
> transaction/transaction manager for the new SessionScope object is null. It
> ends up throwing when it attempts to start a new transaction for the
> sub-select.
> I originally saw this problem when updating my application to use Spring
> 2.0.6 (which uses iBatis 2.3.0 as a dependency of the spring-ibatis module),
> but upon further investigation I was able to isolate it to being in the
> ibatis-sqlmap module. I've since set up our project to use Spring 2.0.6 with
> an older version (2.1.7) of iBatis, and this works fine. While testing the
> problem, we tested iBatis 2.1.7, 2.2.0 and 2.3.0 with both Spring 1.2.9 and
> 2.0.6, and we only experience the problem with iBatis 2.2.0 and 2.3.0.
> Hopefully, this will be fixed but until then we will be sticking with 2.1.7.
> Thank you,
> Mitch Waters
> org.springframework.jdbc.UncategorizedSQLException: SqlMapClient operation;
> uncategorized SQLException for SQL []; SQL state [null]; error code [0];
> --- The error occurred in test.xml.
> --- The error occurred while applying a result map.
> --- Check the complexResult.
> --- Check the result mapping for the 'roles' property.
> --- Cause: java.lang.NullPointerException; nested exception is
> com.ibatis.common.jdbc.exception.NestedSQLException:
> --- The error occurred in test.xml.
> --- The error occurred while applying a result map.
> --- Check the complexResult.
> --- Check the result mapping for the 'roles' property.
> --- Cause: java.lang.NullPointerException
> Caused by: com.ibatis.common.jdbc.exception.NestedSQLException:
> --- The error occurred in test.xml.
> --- The error occurred while applying a result map.
> --- Check the complexResult.
> --- Check the result mapping for the 'roles' property.
> --- Cause: java.lang.NullPointerException
> at
> com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithCallback(GeneralStatement.java:188)
> at
> com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryForList(GeneralStatement.java:123)
> at
> com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:615)
> at
> com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:589)
> at
> com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForList(SqlMapSessionImpl.java:118)
> at
> org.springframework.orm.ibatis.SqlMapClientTemplate$3.doInSqlMapClient(SqlMapClientTemplate.java:269)
> at
> org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:194)
> at
> org.springframework.orm.ibatis.SqlMapClientTemplate.executeWithListResult(SqlMapClientTemplate.java:220)
> at
> org.springframework.orm.ibatis.SqlMapClientTemplate.queryForList(SqlMapClientTemplate.java:267)
> at
> org.springframework.orm.ibatis.SqlMapClientTemplate.queryForList(SqlMapClientTemplate.java:261)
> at dbtest.UserDao.queryForList(UserDao.java:23)
> at dbtest.UserDao.complexQuery(UserDao.java:14)
> at dbtest.UserDaoTest.testGetComplexUserList(UserDaoTest.java:43)
> 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:585)
> at junit.framework.TestCase.runTest(TestCase.java:164)
> at junit.framework.TestCase.runBare(TestCase.java:130)
> at junit.framework.TestResult$1.protect(TestResult.java:106)
> at junit.framework.TestResult.runProtected(TestResult.java:124)
> at junit.framework.TestResult.run(TestResult.java:109)
> at junit.framework.TestCase.run(TestCase.java:120)
> at junit.framework.TestSuite.runTest(TestSuite.java:230)
> at junit.framework.TestSuite.run(TestSuite.java:225)
> at
> org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
> at
> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
> Caused by: java.lang.NullPointerException
> at
> com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.endTransaction(SqlMapExecutorDelegate.java:782)
> at
> com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.endTransaction(SqlMapSessionImpl.java:176)
> at
> com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.endTransaction(SqlMapClientImpl.java:154)
> at
> com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.autoEndTransaction(SqlMapExecutorDelegate.java:883)
> at
> com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:622)
> at
> com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForList(SqlMapExecutorDelegate.java:589)
> at
> com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForList(SqlMapSessionImpl.java:118)
> at
> com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryForList(SqlMapClientImpl.java:95)
> at
> com.ibatis.sqlmap.engine.mapping.result.loader.ResultLoader.getResult(ResultLoader.java:72)
> at
> com.ibatis.sqlmap.engine.mapping.result.loader.ResultLoader.loadResult(ResultLoader.java:59)
> at
> com.ibatis.sqlmap.engine.mapping.result.BasicResultMap.getNestedSelectMappingValue(BasicResultMap.java:502)
> at
> com.ibatis.sqlmap.engine.mapping.result.BasicResultMap.getResults(BasicResultMap.java:340)
> at
> com.ibatis.sqlmap.engine.execution.SqlExecutor.handleResults(SqlExecutor.java:381)
> at
> com.ibatis.sqlmap.engine.execution.SqlExecutor.handleMultipleResults(SqlExecutor.java:301)
> at
> com.ibatis.sqlmap.engine.execution.SqlExecutor.executeQuery(SqlExecutor.java:190)
> at
> com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.sqlExecuteQuery(GeneralStatement.java:205)
> at
> com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithCallback(GeneralStatement.java:173)
> ... 30 more
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