Error querying database. Cause: org.apache.ibatis.executor.result.ResultMapException: Error attempting to get column 'BYTES_' from result set.

[mallop]

Hi,

I'm using Activiti 5.22.0.0 on Oracle database and I'm getting the following error on execution of a process by Junit:

GRAVE: Error while closing command context
org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.  Cause: org.apache.ibatis.executor.result.ResultMapException: Error attempting to get column 'BYTES_' from result set.  Cause: java.sql.SQLRecoverableException: Error de E/S: Unexpected packet
### The error may exist in org/activiti/db/mapping/entity/Resource.xml
### The error may involve org.activiti.engine.impl.persistence.entity.ResourceEntity.selectResourcesByDeploymentId
### The error occurred while handling results
### SQL: select * from ACT_GE_BYTEARRAY where DEPLOYMENT_ID_ = ? order by NAME_ asc
### Cause: org.apache.ibatis.executor.result.ResultMapException: Error attempting to get column 'BYTES_' from result set.  Cause: java.sql.SQLRecoverableException: Error de E/S: Unexpected packet
    at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:122)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:113)
    at org.activiti.engine.impl.db.DbSqlSession.selectListWithRawParameter(DbSqlSession.java:440)
    at org.activiti.engine.impl.db.DbSqlSession.selectList(DbSqlSession.java:431)
    at org.activiti.engine.impl.db.DbSqlSession.selectList(DbSqlSession.java:426)
    at org.activiti.engine.impl.db.DbSqlSession.selectList(DbSqlSession.java:403)
    at org.activiti.engine.impl.persistence.entity.ResourceEntityManager.findResourcesByDeploymentId(ResourceEntityManager.java:45)
    at org.activiti.engine.impl.persistence.entity.DeploymentEntity.getResources(DeploymentEntity.java:67)
    at org.activiti.engine.impl.bpmn.deployer.BpmnDeployer.deploy(BpmnDeployer.java:99)
    at org.activiti.engine.impl.persistence.deploy.DeploymentManager.deploy(DeploymentManager.java:58)
    at org.activiti.engine.impl.persistence.deploy.DeploymentManager.resolveProcessDefinition(DeploymentManager.java:185)
    at org.activiti.engine.impl.persistence.deploy.DeploymentManager.findDeployedLatestProcessDefinitionByKey(DeploymentManager.java:147)
    at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:79)
    at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:37)
    at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24)
    at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57)
    at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47)
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
    at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45)
    at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31)
    at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40)
    at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35)
    at org.activiti.engine.impl.RuntimeServiceImpl.startProcessInstanceByKey(RuntimeServiceImpl.java:82)
    at es.ocu.uxxi.ia.activiti.services.OCUProcessService.execProcessByKey(OCUProcessService.java:85)
    at es.ocu.uxxi.ia.activiti.test.EjecutarCargaIACompletoTest.execCargaIATest(EjecutarCargaIACompletoTest.java:241)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:73)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82)
    at org.activiti.engine.test.ActivitiRule$1.evaluate(ActivitiRule.java:126)
    at org.junit.rules.RunRules.evaluate(RunRules.java:20)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:73)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:224)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:83)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:68)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:163)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.apache.ibatis.executor.result.ResultMapException: Error attempting to get column 'BYTES_' from result set.  Cause: java.sql.SQLRecoverableException: Error de E/S: Unexpected packet
    at org.apache.ibatis.type.BaseTypeHandler.getResult(BaseTypeHandler.java:68)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getPropertyMappingValue(DefaultResultSetHandler.java:411)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.applyPropertyMappings(DefaultResultSetHandler.java:384)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getRowValue(DefaultResultSetHandler.java:346)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValuesForSimpleResultMap(DefaultResultSetHandler.java:298)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValues(DefaultResultSetHandler.java:273)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSet(DefaultResultSetHandler.java:246)
    at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets(DefaultResultSetHandler.java:160)
    at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:63)
    at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:78)
    at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)
    at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:303)
    at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:154)
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:102)
    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:82)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:120)
    ... 59 more
Caused by: java.sql.SQLRecoverableException: Error de E/S: Unexpected packet
    at oracle.jdbc.driver.T4CConnection.getBytes(T4CConnection.java:2325)
    at oracle.sql.BLOB.getBytes(BLOB.java:319)
    at oracle.sql.BLOB.getBytes(BLOB.java:209)
    at org.apache.ibatis.type.BlobTypeHandler.getNullableResult(BlobTypeHandler.java:43)
    at org.apache.ibatis.type.BlobTypeHandler.getNullableResult(BlobTypeHandler.java:28)
    at org.apache.ibatis.type.BaseTypeHandler.getResult(BaseTypeHandler.java:66)
    ... 74 more
Caused by: oracle.net.ns.NetException: Unexpected packet
    at oracle.net.ns.NetInputStream.getNextPacket(NetInputStream.java:252)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:175)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:100)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:85)
    at oracle.jdbc.driver.T4CSocketInputStreamWrapper.readNextPacket(T4CSocketInputStreamWrapper.java:122)
    at oracle.jdbc.driver.T4CSocketInputStreamWrapper.read(T4CSocketInputStreamWrapper.java:78)
    at oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(T4CMAREngine.java:1179)
    at oracle.jdbc.driver.T4CMAREngine.unmarshalSB1(T4CMAREngine.java:1155)
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:279)
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:186)
    at oracle.jdbc.driver.T4C8TTILob.read(T4C8TTILob.java:146)
    at oracle.jdbc.driver.T4CConnection.getBytes(T4CConnection.java:2313)
    ... 79 more

I can't see the cause of the problem. In some cases I'm getting the error, and in others cases (apparently wiht the same condiitions) it works fine.

Can you help me, please?

Thanks.

[salaboy]

Sounds like a serialization problem, what kind of data are you storing in your process variables?