按照wso2官网（https://docs.wso2.com/display/ADMIN44x/Changing+to+MySQL）配置AM的数据库，想从H2换成Mysql5.7，费了将近一天的时间，老是报错，提示AuthorizationUtils Could not set authorizations for the root，报错如下：

Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
        at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167)
        at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:361)
        at com.mysql.cj.protocol.a.NativeAuthenticationProvider.negotiateSSLConnection(NativeAuthenticationProvider.java:777)
        at com.mysql.cj.protocol.a.NativeAuthenticationProvider.proceedHandshakeWithPluggableAuthentication(NativeAuthenticationProvider.java:486)
        at com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:202)
        at com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol.java:1449)
        at com.mysql.cj.NativeSession.connect(NativeSession.java:165)
        at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:849)
        ... 76 more
Caused by: java.net.SocketException: Broken pipe (Write failed)
        at java.net.SocketOutputStream.socketWrite0(Native Method)
        at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:111)
        at java.net.SocketOutputStream.write(SocketOutputStream.java:155)
        at sun.security.ssl.OutputRecord.writeBuffer(OutputRecord.java:431)
        at sun.security.ssl.OutputRecord.write(OutputRecord.java:417)
        at sun.security.ssl.SSLSocketImpl.writeRecordInternal(SSLSocketImpl.java:879)
        at sun.security.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:850)
        at sun.security.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:720)
        at sun.security.ssl.Handshaker.sendChangeCipherSpec(Handshaker.java:1144)
        at sun.security.ssl.ClientHandshaker.sendChangeCipherAndFinish(ClientHandshaker.java:1280)
        at sun.security.ssl.ClientHandshaker.serverHelloDone(ClientHandshaker.java:1190)
        at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:369)
        at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1037)
        at sun.security.ssl.Handshaker.process_record(Handshaker.java:965)
        at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1064)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1367)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1395)
        at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1379)
        at com.mysql.cj.protocol.ExportControlled.performTlsHandshake(ExportControlled.java:315)
        at com.mysql.cj.protocol.StandardSocketFactory.performTlsHandshake(StandardSocketFactory.java:188)
        at com.mysql.cj.protocol.a.NativeSocketConnection.performTlsHandshake(NativeSocketConnection.java:99)
        at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:352)
        ... 82 more
[2019-01-25 17:06:25,484] FATAL - UserRegistry Failed to add the root collection to the coreRegistry.
org.wso2.carbon.registry.core.exceptions.RegistryException: Could not set authorizations for the root.
Caused by: Error! Could not create connection to database server. Attempted reconnect 3 times. Giving up.
        at org.wso2.carbon.registry.core.utils.AuthorizationUtils.setRootAuthorizations(AuthorizationUtils.java:302)
        at org.wso2.carbon.registry.core.session.UserRegistry.addRootCollection(UserRegistry.java:404)
        at org.wso2.carbon.registry.core.session.UserRegistry.init(UserRegistry.java:328)
        at org.wso2.carbon.registry.core.session.UserRegistry.access$100(UserRegistry.java:61)
        at org.wso2.carbon.registry.core.session.UserRegistry$2.run(UserRegistry.java:249)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.wso2.carbon.registry.core.session.UserRegistry.<init>(UserRegistry.java:246)
        at org.wso2.carbon.registry.core.session.UserRegistry.<init>(UserRegistry.java:225)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService.getUserRegistry(EmbeddedRegistryService.java:427)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService.getSystemRegistry(EmbeddedRegistryService.java:292)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService.getSystemRegistry(EmbeddedRegistryService.java:276)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService.getSystemRegistry(EmbeddedRegistryService.java:262)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService.configure(EmbeddedRegistryService.java:219)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService.<init>(EmbeddedRegistryService.java:99)
        at org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent.getEmbeddedRegistryService(RegistryCoreServiceComponent.java:604)
        at org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent.buildRegistryService(RegistryCoreServiceComponent.java:526)
        at org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent.activate(RegistryCoreServiceComponent.java:130)
        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.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260)
        at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146)
        at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:345)
        at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620)
        at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197)
        at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343)
        at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222)
        at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861)
        at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
        at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
        at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819)
        at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771)
        at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
        at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433)
        at org.wso2.carbon.user.core.internal.Activator.startDeploy(Activator.java:73)
        at org.wso2.carbon.user.core.internal.BundleCheckActivator.start(BundleCheckActivator.java:61)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
        at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
        at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
        at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
        at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
        at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
[2019-01-25 17:06:25,529] ERROR - RegistryCoreServiceComponent Failed to activate Registry Core bundle
org.wso2.carbon.registry.core.exceptions.RegistryException: Failed to add the root collection to the coreRegistry.
        at org.wso2.carbon.registry.core.session.UserRegistry.addRootCollection(UserRegistry.java:443)
        at org.wso2.carbon.registry.core.session.UserRegistry.init(UserRegistry.java:328)
        at org.wso2.carbon.registry.core.session.UserRegistry.access$100(UserRegistry.java:61)
        at org.wso2.carbon.registry.core.session.UserRegistry$2.run(UserRegistry.java:249)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.wso2.carbon.registry.core.session.UserRegistry.<init>(UserRegistry.java:246)
        at org.wso2.carbon.registry.core.session.UserRegistry.<init>(UserRegistry.java:225)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService.getUserRegistry(EmbeddedRegistryService.java:427)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService.getSystemRegistry(EmbeddedRegistryService.java:292)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService.getSystemRegistry(EmbeddedRegistryService.java:276)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService.getSystemRegistry(EmbeddedRegistryService.java:262)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService.configure(EmbeddedRegistryService.java:219)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService.<init>(EmbeddedRegistryService.java:99)
        at org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent.getEmbeddedRegistryService(RegistryCoreServiceComponent.java:604)
        at org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent.buildRegistryService(RegistryCoreServiceComponent.java:526)
        at org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent.activate(RegistryCoreServiceComponent.java:130)
        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.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260)
        at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146)
        at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:345)
        at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620)
        at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197)
        at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343)
        at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222)
        at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861)
        at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
        at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
        at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819)
        at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771)
        at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
        at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433)
        at org.wso2.carbon.user.core.internal.Activator.startDeploy(Activator.java:73)
        at org.wso2.carbon.user.core.internal.BundleCheckActivator.start(BundleCheckActivator.java:61)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
        at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
        at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
        at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
        at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
        at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
Caused by: org.wso2.carbon.registry.core.exceptions.RegistryException: Could not set authorizations for the root.
Caused by: Error! Could not create connection to database server. Attempted reconnect 3 times. Giving up.
        at org.wso2.carbon.registry.core.utils.AuthorizationUtils.setRootAuthorizations(AuthorizationUtils.java:302)
        at org.wso2.carbon.registry.core.session.UserRegistry.addRootCollection(UserRegistry.java:404)
        ... 52 more   一开始以为是WOS2关于root的权限认证问题，百度了半天，解决不了，然后google，也没找到相应的手段，换mysql用户，换连接ip都不行，后来偶然发现lls问题，终于解决！ 废话不多，直接说解决方式： mysql为5.7版本，默认ssl为true，需要关闭SSL 将连接配置修改如下  <url>jdbc:mysql://localhost:3306/regdb?useUnicode=true&amp;characterEncoding=utf8&amp;autoReconnect=true&amp;useSSL=false</url>    
扫码关注我们
微信号：SRE实战
拒绝背锅 运筹帷幄

SRE实战 互联网时代守护先锋，助力企业售后服务体系运筹帷幄！一键直达领取阿里云限量特价优惠。