jbpm4 工作流通过hibernate链接informix数据库报错

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17:35:04,441 SEV | [JDBCExceptionReporter] com.informix.asf.IfxASFException: Code-set conversion function failed due to illegal sequence or invalid value.
### EXCEPTION ###########################################
17:35:04,441 SEV | [HibernateSessionResource] hibernate transaction begin failed. closing hibernate session
org.hibernate.exception.GenericJDBCException: Cannot open connection
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:126)
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:114)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:142)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:85)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1353)
at org.jbpm.pvm.internal.tx.HibernateSessionResource.<init>(HibernateSessionResource.java:44)
at org.jbpm.pvm.internal.wire.descriptor.HibernateSessionDescriptor.construct(HibernateSessionDescriptor.java:87)
at org.jbpm.pvm.internal.wire.WireContext.construct(WireContext.java:487)
at org.jbpm.pvm.internal.wire.WireContext.create(WireContext.java:466)
at org.jbpm.pvm.internal.wire.WireContext.create(WireContext.java:455)
at org.jbpm.pvm.internal.wire.WireContext.get(WireContext.java:429)
at org.jbpm.pvm.internal.wire.WireContext.get(WireContext.java:339)
at org.jbpm.pvm.internal.wire.WireContext.get(WireContext.java:704)
at org.jbpm.pvm.internal.env.BasicEnvironment.get(BasicEnvironment.java:132)
at org.jbpm.pvm.internal.env.BasicEnvironment.get(BasicEnvironment.java:123)
at org.jbpm.pvm.internal.env.EnvironmentImpl.getFromCurrent(EnvironmentImpl.java:207)
at org.jbpm.pvm.internal.env.EnvironmentImpl.getFromCurrent(EnvironmentImpl.java:196)
at org.jbpm.pvm.internal.cmd.CheckDbCmd.execute(CheckDbCmd.java:44)
at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42)
at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:50)
at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.executeInNewEnvironment(EnvironmentInterceptor.java:53)
at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:40)
at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:56)
at org.jbpm.pvm.internal.svc.SkipInterceptor.execute(SkipInterceptor.java:43)
at org.jbpm.pvm.internal.processengine.ProcessEngineImpl.checkDb(ProcessEngineImpl.java:152)
at org.jbpm.pvm.internal.processengine.ProcessEngineImpl.<init>(ProcessEngineImpl.java:105)
at org.jbpm.pvm.internal.cfg.ConfigurationImpl.instantiateProcessEngine(ConfigurationImpl.java:100)
at org.jbpm.pvm.internal.cfg.ConfigurationImpl.buildProcessEngine(ConfigurationImpl.java:92)
at org.jbpm.api.Configuration.getProcessEngine(Configuration.java:126)
at org.jbpm.test.JbpmTestCase.buildProcessEngine(JbpmTestCase.java:98)
at org.jbpm.test.JbpmTestCase.setUp(JbpmTestCase.java:87)
at org.jbpm.examples.async.activity.AsyncActivityTest.setUp(AsyncActivityTest.java:38)
at junit.framework.TestCase.runBare(TestCase.java:128)
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:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.sql.SQLException: com.informix.asf.IfxASFException: Code-set conversion function failed due to illegal sequence or invalid value.
at com.informix.jdbc.IfxSqliConnect.<init>(IfxSqliConnect.java:1503)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.informix.jdbc.IfxDriver.connect(IfxDriver.java:237)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:190)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
... 44 more
Caused by: com.informix.asf.IfxASFException: Code-set conversion function failed due to illegal sequence or invalid value.
at com.informix.asf.Connection.establishConnection(Connection.java:1606)
at com.informix.asf.Connection.<init>(Connection.java:393)
at com.informix.jdbc.IfxSqliConnect.<init>(IfxSqliConnect.java:1223)
... 53 more
### EXCEPTION ###########################################
求大神帮忙解决!!!!!!!!!