com.google.gwtorm.client.OrmException: fetch failure on changes
at com.google.gwtorm.schema.sql.SqlDialect.convertError(SqlDialect.java:122)
at com.google.gwtorm.jdbc.JdbcAccess.convertError(JdbcAccess.java:331)
at com.google.gwtorm.jdbc.JdbcAccess.queryList(JdbcAccess.java:152)
at com.google.gerrit.reviewdb.Change_Access_changes_GwtOrm$$0.allOpenNext(Unknown Source)
at com.google.gerrit.server.query.change.ChangeQueryRewriter$8.scan(ChangeQueryRewriter.java:277)
at com.google.gerrit.server.query.change.ChangeQueryRewriter$PaginatedSource.scan(ChangeQueryRewriter.java:616)
at com.google.gerrit.server.query.change.ChangeQueryRewriter$ChangeSource.read(ChangeQueryRewriter.java:579)
at com.google.gerrit.server.query.change.AndSource.read(AndSource.java:94)
at com.google.gerrit.httpd.rpc.ChangeListServiceImpl.searchQuery(ChangeListServiceImpl.java:167)
at com.google.gerrit.httpd.rpc.ChangeListServiceImpl.access$100(ChangeListServiceImpl.java:55)
at com.google.gerrit.httpd.rpc.ChangeListServiceImpl$6.query(ChangeListServiceImpl.java:137)
at com.google.gerrit.httpd.rpc.ChangeListServiceImpl$QueryNext.run(ChangeListServiceImpl.java:325)
at com.google.gerrit.httpd.rpc.ChangeListServiceImpl$QueryNext.run(ChangeListServiceImpl.java:307)
at com.google.gerrit.httpd.rpc.BaseServiceImplementation.run(BaseServiceImplementation.java:63)
at com.google.gerrit.httpd.rpc.ChangeListServiceImpl.allQueryNext(ChangeListServiceImpl.java:133)
at sun.reflect.GeneratedMethodAccessor41.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwtjsonrpc.server.MethodHandle.invoke(MethodHandle.java:91)
at com.google.gwtjsonrpc.server.JsonServlet.doService(JsonServlet.java:382)
at com.google.gwtjsonrpc.server.JsonServlet.service(JsonServlet.java:268)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:216)
at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:141)
at com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:93)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:63)
at com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:134)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:59)
at com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:134)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:59)
at com.google.gwtexpui.server.CacheControlFilter.doFilter(CacheControlFilter.java:76)
at com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:129)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:59)
at com.google.gerrit.httpd.RequestCleanupFilter.doFilter(RequestCleanupFilter.java:54)
at com.google.inject.servlet.FilterDefinition.doFilter(FilterDefinition.java:129)
at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:59)
at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:122)
at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:110)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:864)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1665)
at java.lang.Thread.run(Unknown Source)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 234.533.609 milliseconds ago. The last packet sent successfully to the server was 234.533.609 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.GeneratedConstructorAccessor161.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3313)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1940)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2109)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2642)
at com.mysql.jdbc.StatementImpl.executeSimpleNonQuery(StatementImpl.java:1544)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2215)
at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96)
at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96)
at com.google.gwtorm.jdbc.JdbcAccess.queryList(JdbcAccess.java:136)