hi the expression is : logical.ifFunc(text.right(HBYWLB,1)=='B',-1,1) the logical and text in the expression are coustomize bean. I test the expr if run fast it will error every time. but when I sleep(10) the code every execute ,it's will be fine. if I run the expr with multi thread it also error. and if the expression set with bellow: logical.ifFunc(text.right(HBYWLB,1)=='B',-AAA,AAA) it's run fine. needs help. error message is: ------------- java.util.concurrent.ExecutionException: java.lang.VerifyError: (class: ASMAccessorImpl_24162531328537580890, method: getValue signature: (Ljava/lang/Object;Ljava/lang/Object;Lorg/mvel2/integration/VariableResolverFactory;)Ljava/lang/Object;) Expecting to find integer on stack at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222) at java.util.concurrent.FutureTask.get(FutureTask.java:83) at com.bocom.tgs.component.base.expr.api.ExpressionTest.testDDDDE(ExpressionTest.java:1444) 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:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74) at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82) at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:240) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) at org.junit.runners.ParentRunner.run(ParentRunner.java:236) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:180) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49) 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.lang.VerifyError: (class: ASMAccessorImpl_24162531328537580890, method: getValue signature: (Ljava/lang/Object;Ljava/lang/Object;Lorg/mvel2/integration/VariableResolverFactory;)Ljava/lang/Object;) Expecting to find integer on stack at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389) at java.lang.Class.getConstructor0(Class.java:2699) at java.lang.Class.getConstructor(Class.java:1657) at org.mvel2.optimizers.impl.asm.ASMAccessorOptimizer._initializeAccessor(ASMAccessorOptimizer.java:705) at org.mvel2.optimizers.impl.asm.ASMAccessorOptimizer.compileAccessor(ASMAccessorOptimizer.java:832) at org.mvel2.optimizers.impl.asm.ASMAccessorOptimizer.optimizeAccessor(ASMAccessorOptimizer.java:239) at org.mvel2.optimizers.dynamic.DynamicGetAccessor.optimize(DynamicGetAccessor.java:83) at org.mvel2.optimizers.dynamic.DynamicGetAccessor.getValue(DynamicGetAccessor.java:57) at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:98) at org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:42) at org.mvel2.MVEL.executeExpression(MVEL.java:1057) at org.mvel2.MVEL.executeExpression(MVEL.java:1104) at com.bocom.tgs.component.base.expr.api.DefaultExpressionEntry.unitExecute(DefaultExpressionEntry.java:147) at com.bocom.tgs.component.base.expr.api.DefaultExpressionEntry.execute(DefaultExpressionEntry.java:120) at com.bocom.tgs.component.base.expr.api.DefaultExpressionExecutor.execute(DefaultExpressionExecutor.java:30) at com.bocom.tgs.component.base.expr.api.ExpressionImpl.calculate(ExpressionImpl.java:29) at com.bocom.tgs.component.base.expr.api.Tttt.call(ExpressionTest.java:1479) at com.bocom.tgs.component.base.expr.api.Tttt.call(ExpressionTest.java:1) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) -----------------