Use of precompiled reports throws exception

[gkari]

Dear all,

We've generated report templates using the I-report plugin for Netbeans and  store the compiled (.jasper) files. When the application is built, these are stored under WEB-INF/classes/../templates.

When accessed through the application for report generation the following exception is thrown:

net.sf.jasperreports.engine.JRException: Error loading object from InputStream                at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:198)                at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:603)                at management.reports.ReportingBean.generateReport(ReportingBean.java:520)                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

Caused by: java.io.UTFDataFormatException                at java.io.ObjectInputStream$BlockDataInputStream.readUTFSpan(ObjectInputStream.java:3082)                at java.io.ObjectInputStream$BlockDataInputStream.readUTFBody(ObjectInputStream.java:3007)                at java.io.ObjectInputStream$BlockDataInputStream.readUTF(ObjectInputStream.java:2820)

However, when the reports are compiled within the java application and then used (as opposed to using the already compiled reports), everything works fine.

Is there a way to avoid the overhead of compiling each report before use and just using precompiled .jasper files?

Any pointers would be appreciated.

Thanks.