Timeout is seeing in some JasperReports 6.3 Ad Hoc reports.
The following message is displayed:

Enabled the MySQL query logging in JasperReports.
1. Edit the C:\Program Files\CA\SC\CA Business Intelligence\apache-tomcat\webapps\jasperserver-pro\WEB-INF\log4j.properties file.
2. Locate the following section:
### JasperReports loggers
#log4j.logger.net.sf.jasperreports.engine.query.JRJdbcQueryExecuter=debug
3. Uncomment the debug line as follows:
### JasperReports loggers
log4j.logger.net.sf.jasperreports.engine.query.JRJdbcQueryExecuter=debug
4. Stop and then start all JasperReports services
C:\Users\spectrum\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\CA\CA Business Intelligence\Start and stop servers
- Stop CABI Services
- Start CABI Services
5. Reproduce the Ad Hoc issue.
6. Review the C:\Program Files\CA\SC\CA Business Intelligence\apache-tomcat\webapps\jasperserver-pro\WEB-INF\logs\jasperserver.log file.
2017-09-12 17:54:52,034 DEBUG JRJdbcQueryExecuter,Thread-45:362 - SQL query string: select `v_dim_event_creator`.`creator_name` as `v_dim_event_creator_creator_name`,
`v_dim_model`.`model_name` as `v_dim_model_model_name`
from `v_fact_event`
left outer join `v_dim_model` on (`v_fact_event`.`model_key` = `v_dim_model`.`model_key`)
right outer join `v_dim_event_creator` on (`v_dim_event_creator`.`creator_id` = `v_fact_event`.`creator_id`)
group by `v_dim_model`.`model_name`, `v_dim_event_creator`.`creator_name`
order by `v_dim_model_model_name`, `v_dim_event_creator_creator_name`
limit 1000
2017-09-12 18:00:52,277 ERROR AdhocAjaxController,http-apr-8080-exec-5:954 - ad hoc controller exception: Ocorreu um erro durante a execução da solicitação anterior.
java.lang.RuntimeException: exception getting dataset from cache
at com.jaspersoft.commons.semantic.dsimpl.memory.MemoryDataSet.getWorkingDataSet(MemoryDataSet.java:147)
at com.jaspersoft.commons.semantic.dsimpl.memory.MemoryDataSet.getWorkingDataSet(MemoryDataSet.java:75)
Caused by: com.jaspersoft.commons.dataset.DataSetException: Exception calling JRDataSource.next() for query select `v_dim_event_creator`.`creator_name` as `v_dim_event_creator_creator_name`,
`v_dim_model`.`model_name` as `v_dim_model_model_name`
from `v_fact_event`
left outer join `v_dim_model` on (`v_fact_event`.`model_key` = `v_dim_model`.`model_key`)
right outer join `v_dim_event_creator` on (`v_dim_event_creator`.`creator_id` = `v_fact_event`.`creator_id`)
group by `v_dim_model`.`model_name`, `v_dim_event_creator`.`creator_name`
order by `v_dim_model_model_name`, `v_dim_event_creator_creator_name`
limit 1000
Caused by: com.jaspersoft.commons.util.QueryExecutionTimeoutException: jsexception.QueryExecutionTimeoutException
Arguments: 360,
The QueryExecutionTimeoutException is occurring after 360 seconds.