s signer information does not match signer information of other classes in the same

When you use Proxool to connect to SQL Server 2012, there is always the following error, which was originally thought to be a proxool configuration file problem. Take a closer look at the anomaly, the original is Sqljdbc4.jar in mischief

The solution is:

Open Sqljdbc4.jar to delete the Meta-info file MANIFEST.MF msftsign in the directory. Rsa,msftsig. SF can

The exception information is as follows:

Java.lang.ExceptionInInitializerError at Sun.reflect.NativeMethodAccessorImpl.invoke0 (Native method)
At Sun.reflect.NativeMethodAccessorImpl.invoke (Unknown Source)
At Sun.reflect.DelegatingMethodAccessorImpl.invoke (Unknown Source)
At Java.lang.reflect.Method.invoke (Unknown Source)
At Org.logicalcobwebs.cglib.proxy.Enhancer.setCallbacksHelper (enhancer.java:616)
At Org.logicalcobwebs.cglib.proxy.Enhancer.setThreadCallbacks (enhancer.java:609)
At Org.logicalcobwebs.cglib.proxy.Enhancer.createUsingReflection (enhancer.java:631)
At Org.logicalcobwebs.cglib.proxy.Enhancer.firstInstance (enhancer.java:538)
At Org.logicalcobwebs.cglib.core.AbstractClassGenerator.create (abstractclassgenerator.java:225)
At Org.logicalcobwebs.cglib.proxy.Enhancer.createHelper (enhancer.java:377)
At Org.logicalcobwebs.cglib.proxy.Enhancer.create (enhancer.java:285)
At Org.logicalcobwebs.proxool.ProxyFactory.getProxy (proxyfactory.java:116)
At Org.logicalcobwebs.proxool.ProxyFactory.getWrappedConnection (proxyfactory.java:85)
At Org.logicalcobwebs.proxool.ConnectionPool.getConnection (connectionpool.java:261)
At Org.logicalcobwebs.proxool.ProxoolDriver.connect (proxooldriver.java:89)
At Java.sql.DriverManager.getConnection (Unknown Source)
At Java.sql.DriverManager.getConnection (Unknown Source)
At Portal.petrochina.eas.dbconnection.SQLServerAccountConnectionPool.getInstance ( SQLSERVERACCOUNTCONNECTIONPOOL.JAVA:60)
At Portal.petrochina.eas.service.UserInfoService.authenticateInfo (userinfoservice.java:42)
At Test. Accountuserauthenticate.test (accountuserauthenticate.java:26)
At Sun.reflect.NativeMethodAccessorImpl.invoke0 (Native method)
At Sun.reflect.NativeMethodAccessorImpl.invoke (Unknown Source)
At Sun.reflect.DelegatingMethodAccessorImpl.invoke (Unknown Source)
At Java.lang.reflect.Method.invoke (Unknown Source)
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.runners.ParentRunner.runLeaf (parentrunner.java:271)
At Org.junit.runners.BlockJUnit4ClassRunner.runChild (blockjunit4classrunner.java:70)
At Org.junit.runners.BlockJUnit4ClassRunner.runChild (blockjunit4classrunner.java:50)
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$2.evaluate (parentrunner.java:229)
At Org.junit.runners.ParentRunner.run (parentrunner.java:309)
At Org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run (junit4testreference.java:50)
At Org.eclipse.jdt.internal.junit.runner.TestExecution.run (testexecution.java:38)
At Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests (remotetestrunner.java:459)
At Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests (remotetestrunner.java:675)
At Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run (remotetestrunner.java:382)
At Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main (remotetestrunner.java:192)
caused by:org.logicalcobwebs.cglib.core.codegenerationexception:java.lang.reflect.invocationtargetexception-- >null
At Org.logicalcobwebs.cglib.core.AbstractClassGenerator.create (abstractclassgenerator.java:237)
At Org.logicalcobwebs.cglib.reflect.fastclass$generator.create (fastclass.java:64)
At Org.logicalcobwebs.cglib.proxy.MethodProxy.helper (methodproxy.java:81)
At Org.logicalcobwebs.cglib.proxy.MethodProxy.create (methodproxy.java:46)
At $java. sql.wrapper$ $EnhancerByProxool $ $c 3684300. Cglib$statichook1 (<generated>)
At $java. sql.wrapper$ $EnhancerByProxool $ $c 3684300.<clinit> (<generated>)
... More
caused by:java.lang.reflect.InvocationTargetException
At Sun.reflect.NativeMethodAccessorImpl.invoke0 (Native method)
At Sun.reflect.NativeMethodAccessorImpl.invoke (Unknown Source)
At Sun.reflect.DelegatingMethodAccessorImpl.invoke (Unknown Source)
At Java.lang.reflect.Method.invoke (Unknown Source)
At Org.logicalcobwebs.cglib.core.ReflectUtils.defineClass (reflectutils.java:384)
At Org.logicalcobwebs.cglib.core.AbstractClassGenerator.create (abstractclassgenerator.java:219)
... More
caused By:java.lang.SecurityException:class "com.microsoft.sqlserver.jdbc.isqlserverconnection$$ Fastclassbyproxool$$2b8cf6af "' s signer information does not match signer information of other classes in the same
At Java.lang.ClassLoader.checkCerts (Unknown Source)
At Java.lang.ClassLoader.preDefineClass (Unknown Source)
At Java.lang.ClassLoader.defineClass (Unknown Source)
... More