获取与WSO2 ESB5.0.0中的数据库和注册表索引相关的警告

我有一个WSO2 ESB集群，其中有1个管理器节点和5个以上的工作节点。我的数据库是mariadb和galera。最近我在日志中得到了一些警告。下同：

TID: [-1234] [] [2020-01-08 13:34:13,537]  WARN {org.wso2.carbon.registry.indexing.ResourceSubmitter} -  An error occurred while submitting resources for indexing {org.wso2.carbon.registry.indexing.ResourceSubmitter}
org.wso2.carbon.registry.core.exceptions.RegistryException: Failed to start new registry transaction.
        at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCTransactionManager.beginTransaction(JDBCTransactionManager.java:97)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.beginTransaction(EmbeddedRegistry.java:443)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.getLogs(EmbeddedRegistry.java:2371)
        at org.wso2.carbon.registry.core.caching.CacheBackedRegistry.getLogs(CacheBackedRegistry.java:485)
        at org.wso2.carbon.registry.core.session.UserRegistry.getLogsInternal(UserRegistry.java:1810)
        at org.wso2.carbon.registry.core.session.UserRegistry.access$3600(UserRegistry.java:61)
        at org.wso2.carbon.registry.core.session.UserRegistry$37.run(UserRegistry.java:1781)
        at org.wso2.carbon.registry.core.session.UserRegistry$37.run(UserRegistry.java:1778)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.wso2.carbon.registry.core.session.UserRegistry.getLogs(UserRegistry.java:1778)
        at org.wso2.carbon.registry.indexing.ResourceSubmitter.submitResource(ResourceSubmitter.java:119)
        at org.wso2.carbon.registry.indexing.ResourceSubmitter.run(ResourceSubmitter.java:76)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 226,314,205 milliseconds ago.  The last packet sent successfully to the server was 226,299,120 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
        at sun.reflect.GeneratedConstructorAccessor1281.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
        at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2518)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2683)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2482)
        at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:4796)
        at sun.reflect.GeneratedMethodAccessor29.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.tomcat.jdbc.pool.ProxyConnection.invoke(ProxyConnection.java:126)
        at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:109)
        at org.wso2.carbon.ndatasource.rdbms.ConnectionRollbackOnReturnInterceptor.invoke(ConnectionRollbackOnReturnInterceptor.java:51)
        at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:109)
        at org.apache.tomcat.jdbc.pool.interceptor.AbstractCreateStatementInterceptor.invoke(AbstractCreateStatementInterceptor.java:71)
        at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:109)
        at org.apache.tomcat.jdbc.pool.interceptor.ConnectionState.invoke(ConnectionState.java:153)
        at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:109)
        at org.apache.tomcat.jdbc.pool.TrapException.invoke(TrapException.java:41)
        at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:109)
        at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:80)
        at com.sun.proxy.$Proxy18.setAutoCommit(Unknown Source)
        at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCDatabaseTransaction$ManagedRegistryConnection.setAutoCommit(JDBCDatabaseTransaction.java:1485)
        at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCTransactionManager.beginTransaction(JDBCTransactionManager.java:92)
        ... 18 more
Caused by: java.lang.NullPointerException
TID: [-1234] [] [2020-01-08 13:34:16,541] ERROR {org.wso2.carbon.registry.core.dataaccess.TransactionManager} -  Failed to start new registry transaction. {org.wso2.carbon.registry.core.dataaccess.TransactionManager}
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 226,317,209 milliseconds ago.  The last packet sent successfully to the server was 226,302,124 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
        at sun.reflect.GeneratedConstructorAccessor1281.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
        at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2518)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2683)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2482)
        at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:4796)
        at sun.reflect.GeneratedMethodAccessor29.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.tomcat.jdbc.pool.ProxyConnection.invoke(ProxyConnection.java:126)
        at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:109)
        at org.wso2.carbon.ndatasource.rdbms.ConnectionRollbackOnReturnInterceptor.invoke(ConnectionRollbackOnReturnInterceptor.java:51)
        at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:109)
        at org.apache.tomcat.jdbc.pool.interceptor.AbstractCreateStatementInterceptor.invoke(AbstractCreateStatementInterceptor.java:71)
        at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:109)
        at org.apache.tomcat.jdbc.pool.interceptor.ConnectionState.invoke(ConnectionState.java:153)
        at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:109)
        at org.apache.tomcat.jdbc.pool.TrapException.invoke(TrapException.java:41)
        at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:109)
        at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:80)
        at com.sun.proxy.$Proxy18.setAutoCommit(Unknown Source)
        at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCDatabaseTransaction$ManagedRegistryConnection.setAutoCommit(JDBCDatabaseTransaction.java:1485)
        at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCTransactionManager.beginTransaction(JDBCTransactionManager.java:92)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.beginTransaction(EmbeddedRegistry.java:443)
        at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.getLogs(EmbeddedRegistry.java:2371)
        at org.wso2.carbon.registry.core.caching.CacheBackedRegistry.getLogs(CacheBackedRegistry.java:485)
        at org.wso2.carbon.registry.core.session.UserRegistry.getLogsInternal(UserRegistry.java:1810)
        at org.wso2.carbon.registry.core.session.UserRegistry.access$3600(UserRegistry.java:61)
        at org.wso2.carbon.registry.core.session.UserRegistry$37.run(UserRegistry.java:1781)
        at org.wso2.carbon.registry.core.session.UserRegistry$37.run(UserRegistry.java:1778)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.wso2.carbon.registry.core.session.UserRegistry.getLogs(UserRegistry.java:1778)
        at org.wso2.carbon.registry.indexing.ResourceSubmitter.submitResource(ResourceSubmitter.java:119)
        at org.wso2.carbon.registry.indexing.ResourceSubmitter.run(ResourceSubmitter.java:76)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException

我的数据源配置（/repository/conf/datasources/master datasources.xml）是：

org.wso2.carbon.ndasource.rdbms.RDBMSDataSourceReader
注册表\本地1
用于注册表的数据源-本地
jdbc/WSO2CarbonDB
jdbc：mysql://esb:3307/ESB_LocalRegistry_W02?autoReconnect=true&usesl=false
esb
QCP5SvEWL4
com.mysql.jdbc.Driver
50
60000
真的
选择1
30000
注册数据库
用于registry-config/governance的数据源
jdbc/WSO2RegistryDB
jdbc：mysql://esb:3307/ESB_ShareRegistry?autoReconnect=true&usesl=false
esb
QCP5SvEWL4
com.mysql.jdbc.Driver
50
60000
真的
选择1
30000
WSO2_用户_数据库
用于注册表和用户管理器的数据源
jdbc/WSO2UMDB
jdbc：mysql://esb:3307/ESB_ShareUser?autoReconnect=true&usesl=false
esb
QCP5SvEWL4
com.mysql.jdbc.Driver
50
60000
真的
选择1
30000

为什么我会收到这些警告

我怎样才能修好它

仅供参考，我的服务工作正常，代理服务调用中没有错误

<datasources-configuration xmlns:svns="http://org.wso2.securevault/configuration">
     <providers>
        <provider>org.wso2.carbon.ndatasource.rdbms.RDBMSDataSourceReader</provider>
    </providers>
    <datasources>
        <datasource>
            <name>REGISTRY_LOCAL1</name>
            <description>The datasource used for registry- local</description>
            <jndiConfig>
                <name>jdbc/WSO2CarbonDB</name>
            </jndiConfig>
            <definition type="RDBMS">
                <configuration>
                    <url>jdbc:mysql://esb:3307/ESB_LocalRegistry_W02?autoReconnect=true&amp;useSSL=false</url>
                    <username>esb</username>
                    <password>QCP5SvEWL4</password>
                    <driverClassName>com.mysql.jdbc.Driver</driverClassName>
                    <maxActive>50</maxActive>
                    <maxWait>60000</maxWait>
                    <testOnBorrow>true</testOnBorrow>
                    <validationQuery>SELECT 1</validationQuery>
                    <validationInterval>30000</validationInterval>
                </configuration>
            </definition>
        </datasource>
        <datasource>
            <name>REGISTRY_DB</name>
            <description>The datasource used for registry- config/governance</description>
            <jndiConfig>
                <name>jdbc/WSO2RegistryDB</name>
            </jndiConfig>
            <definition type="RDBMS">
                <configuration>
                    <url>jdbc:mysql://esb:3307/ESB_ShareRegistry?autoReconnect=true&amp;useSSL=false</url>
                    <username>esb</username>
                    <password>QCP5SvEWL4</password>
                    <driverClassName>com.mysql.jdbc.Driver</driverClassName>
                    <maxActive>50</maxActive>
                    <maxWait>60000</maxWait>
                    <testOnBorrow>true</testOnBorrow>
                    <validationQuery>SELECT 1</validationQuery>
                    <validationInterval>30000</validationInterval>
                </configuration>
            </definition>
        </datasource>
         <datasource>
            <name>WSO2_USER_DB</name>
            <description>The datasource used for registry and user manager</description>
            <jndiConfig>
                <name>jdbc/WSO2UMDB</name>
            </jndiConfig>
            <definition type="RDBMS">
                <configuration>
                    <url>jdbc:mysql://esb:3307/ESB_ShareUser?autoReconnect=true&amp;useSSL=false</url>
                    <username>esb</username>
                    <password>QCP5SvEWL4</password>
                    <driverClassName>com.mysql.jdbc.Driver</driverClassName>
                    <maxActive>50</maxActive>
                    <maxWait>60000</maxWait>
                    <testOnBorrow>true</testOnBorrow>
                    <validationQuery>SELECT 1</validationQuery>
                    <validationInterval>30000</validationInterval>
                </configuration>
            </definition>
        </datasource>
   </datasources>
</datasources-configuration>