Tomcat + Mysql connection pool issue on Cluster environment https://uat.liferay.dev/c/message_boards/find_thread?p_l_id=119785294&threadId=121553266 2026-10-15T11:35:51Z 2026-10-15T11:35:51Z Ankita Singh https://uat.liferay.dev/c/message_boards/find_message?p_l_id=119785294&messageId=121553265 2022-11-04T17:37:54Z 2022-11-04T12:35:00Z

<p>Getting below exception when portal is idle for some time. Causing the portal to be unresponsive. Using tomcat database connection pool.</p> <p> </p> <p>com.liferay.portal.kernel.exception.SystemException: com.mysql.cj.jdbc.exceptions.CommunicationsException: The last packet successfully received from the server was 285,122 milliseconds ago.  The last packet sent successfully to the server was 285,126 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.<br />         at com.liferay.portal.kernel.internal.service.persistence.TableMapperImpl.getPrimaryKeys(TableMapperImpl.java:444)<br />         at com.liferay.portal.kernel.internal.service.persistence.TableMapperImpl.getLeftPrimaryKeys(TableMapperImpl.java:282)<br />         at com.liferay.portal.kernel.internal.service.persistence.change.tracking.CTTableMapper.getLeftPrimaryKeys(CTTableMapper.java:270)<br />         at com.liferay.portal.kernel.internal.service.persistence.ReverseTableMapper.getRightPrimaryKeys(ReverseTableMapper.java:133)<br />         at com.liferay.portal.service.persistence.impl.UserPersistenceImpl.getOrganizationPrimaryKeys(UserPersistenceImpl.java:9315)<br />         at com.liferay.portal.service.impl.OrganizationLocalServiceImpl.getUserOrganizationIds(OrganizationLocalServiceImpl.java:930)<br />         at sun.reflect.GeneratedMethodAccessor426.invoke(Unknown Source)<br />         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)<br />         at java.lang.reflect.Method.invoke(Method.java:498)<br />         at com.liferay.portal.spring.aop.AopMethodInvocationImpl.proceed(AopMethodInvocationImpl.java:50)<br />         at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:69)<br />         at com.liferay.portal.spring.aop.AopMethodInvocationImpl.proceed(AopMethodInvocationImpl.java:57)<br />         at com.liferay.portal.spring.aop.AopInvocationHandler.invoke(AopInvocationHandler.java:49)<br />         at com.sun.proxy.$Proxy184.getUserOrganizationIds(Unknown Source)<br />         at com.liferay.portal.kernel.service.OrganizationLocalServiceUtil.getUserOrganizationIds(OrganizationLocalServiceUtil.java:907)<br />         at com.liferay.portal.model.impl.UserImpl.getOrganizationIds(UserImpl.java:523)<br />         at com.liferay.portal.model.impl.UserImpl.getOrganizationIds(UserImpl.java:516)<br />         at com.liferay.portal.util.PortalImpl.getDoAsUserId(PortalImpl.java:7622)<br />         at com.liferay.portal.util.PortalImpl.getUserId(PortalImpl.java:5717)<br />         at com.liferay.portal.util.PortalImpl.getUser(PortalImpl.java:5588)<br />         at com.liferay.portal.kernel.util.PortalUtil.getUser(PortalUtil.java:1741)<br />         at com.liferay.portal.kernel.service.ServiceContextFactory._getInstance(ServiceContextFactory.java:217)<br />         at com.liferay.portal.kernel.service.ServiceContextFactory.getInstance(ServiceContextFactory.java:62)<br />         at com.liferay.portal.servlet.filters.absoluteredirects.AbsoluteRedirectsFilter.doFilterTry(AbsoluteRedirectsFilter.java:88)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:194)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:99)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:196)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:99)<br />         at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)<br />         at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)<br />         at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)<br />         at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:389)<br />         at com.liferay.portal.servlet.filters.urlrewrite.UrlRewriteFilter.processFilter(UrlRewriteFilter.java:65)<br />         at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:215)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:175)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:99)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:175)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:99)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:196)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:99)<br />         at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:104)<br />         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)<br />         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)<br />         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)<br />         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)<br />         at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)<br />         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)<br />         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)<br />         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)<br />         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)<br />         at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373)<br />         at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)<br />         at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)<br />         at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1589)<br />         at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)<br />         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)<br />         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)<br />         at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)<br />         at java.lang.Thread.run(Thread.java:748)<br />  </p> <p>Thanks in advance</p>

Ankita Singh 2022-11-04T12:35:00Z