报表读数据内存溢出

Houston

在报表读取action返回的数据时，如果数据量过大，比如有几万条，则浏览器会报如下
2017-9-26 9:56:45 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet reportServerServlet threw exception
java.lang.OutOfMemoryError: Java heap space
        at java.util.Arrays.copyOf(Arrays.java:2760)
        at java.util.Arrays.copyOf(Arrays.java:2734)
        at java.util.ArrayList.ensureCapacity(ArrayList.java:167)
        at java.util.ArrayList.add(ArrayList.java:351)
        at org.dom4j.tree.DefaultElement.addNewNode(DefaultElement.java:909)
        at org.dom4j.tree.AbstractElement.addNode(AbstractElement.java:1524)
        at org.dom4j.tree.AbstractElement.add(AbstractElement.java:1002)
        at org.dom4j.tree.AbstractBranch.addElement(AbstractBranch.java:186)
        at com.justep.report.convertor.XHTMLConvertor.addTableCell(Unknown Source)
        at com.justep.report.TableCell.transform(Unknown Source)
        at com.justep.report.CompiledCell.transform(Unknown Source)
        at com.justep.report.CompiledSheet.transform(Unknown Source)
        at com.justep.report.CompiledTable.transform(Unknown Source)
        at com.justep.report.Table.transform(Unknown Source)
        at com.justep.report.Content.transform(Unknown Source)
        at com.justep.report.ContentSet.transform(Unknown Source)
        at com.justep.report.Report.a(Unknown Source)
        at com.justep.report.ReportDocument.transform(Unknown Source)
        at com.justep.report.ReportTransformer.transform(Unknown Source)
        at com.justep.report.core.XReportHelper.executeXReport(Unknown Source)
        at com.justep.report.controller.ReportController.execute(Unknown Source)
        at com.justep.report.controller.GenericControllerChain.execute(Unknown Source)
        at com.justep.report.controller.DataController.execute(Unknown Source)
        at com.justep.report.controller.GenericControllerChain.execute(Unknown Source)
        at com.justep.report.controller.InitController.execute(Unknown Source)
        at com.justep.report.controller.GenericControllerChain.execute(Unknown Source)
        at com.justep.report.Servlet.a(Unknown Source)
        at com.justep.report.Servlet.doPost(Unknown Source)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
2017-09-26 09:56:45 报表服务请求失败

jishuang

内存没有好的解决方案，只能通过调整tomcat的内存设置看看