偶尔报“31300012 创建数据连接失败”有知道怎么回事的吗？

如题，错误信息如下，不知道什么鬼，报错时所有报表都不可用，重启恢复，finedb已迁移到mysql，fr9

19:39:17 http-bio-8080-exec-11 WARN [root] 错误代码:31300012 创建数据连接失败: wait millis 10173, active 13, maxActive 300

19:39:17 http-bio-8080-exec-36 WARN [com.fr.third.alibaba.druid.pool.DruidDataSource] not full timeout retry : 1

19:39:17 http-bio-8080-exec-10 WARN [root] 错误代码:31300012 创建数据连接失败: wait millis 10039, active 13, maxActive 300

19:39:17 http-bio-8080-exec-10 ERROR [root] com.fr.third.alibaba.druid.pool.GetConnectionTimeoutException: wait millis 10039, active 13, maxActive 300

com.fr.data.dao.DAOException: com.fr.third.alibaba.druid.pool.GetConnectionTimeoutException: wait millis 10039, active 13, maxActive 300

at com.fr.data.dao.JDBCDAOSession.__list_by_sql__(Unknown Source)

at com.fr.data.dao.JDBCDAOSession.listByFieldValue(Unknown Source)

at com.fr.fs.control.dao.hsqldb.HSQLUserDAO.findByUserName(Unknown Source)

at com.fr.fs.control.UserControl.getUser(Unknown Source)

at com.fr.fs.web.service.AbstractFSAuthService.syncUserID(Unknown Source)

at com.fr.fs.web.service.FSMainService.process(Unknown Source)

at com.fr.stable.fun.impl.NoSessionIDService.process(Unknown Source)

at com.fr.web.core.ReportDispatcher.dealWithOp(Unknown Source)

at com.fr.web.core.ReportDispatcher.dealWeblet(Unknown Source)

at com.fr.web.core.ReportDispatcher.dealWithRequest(Unknown Source)

at com.fr.web.BaseServlet.doGet(Unknown Source)

at com.fr.web.BaseServlet.doPost(Unknown Source)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:498)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1139)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.lang.Thread.run(Thread.java:748)

Caused by: com.fr.third.alibaba.druid.pool.GetConnectionTimeoutException: wait millis 10039, active 13, maxActive 300

at com.fr.third.alibaba.druid.pool.DruidDataSource.getConnectionInternal(DruidDataSource.java:1269)

at com.fr.third.alibaba.druid.pool.DruidDataSource.getConnectionDirect(DruidDataSource.java:1084)

at com.fr.third.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1064)

at com.fr.third.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1054)

at com.fr.third.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:100)

at com.fr.data.pool.MemoryConnection.create(MemoryConnection.java:37)

at com.fr.data.impl.JDBCDatabaseConnection.createConnection(JDBCDatabaseConnection.java:201)

at com.fr.data.dao.JDBCDataAccessObjectOperator.createConnection(Unknown Source)

at com.fr.data.dao.JDBCDAOSession.getJDBCTemplate(Unknown Source)

... 35 more

19:39:17 http-bio-8080-exec-19 WARN [com.fr.third.alibaba.druid.pool.DruidDataSource] not full timeout retry : 1

19:39:17 http-bio-8080-exec-11 WARN [root] wait millis 10173, active 13, maxActive 300

com.fr.third.alibaba.druid.pool.GetConnectionTimeoutException: wait millis 10173, active 13, maxActive 300