Jasper output no details when Jasper cannot find mappings between generated servlet code (with mistakes) and former JSP. One example JSP is the following. (The imported class in the JSP is not found.) --- <%@ page import = "not.exist.class" %> ---
Created attachment 20085 [details] Patch for Jasper to output details of the compile error.
The patch corrects Jasper to output error details. And it also fixes a bug that the InputStream was not closed.
Created attachment 20140 [details] fix previous patch's bug The following problem of the previous patch were corrected: When the exception is generated when calling the jsp servlet after the compilation of JSP succeeds, details (information of the JSP source) become null.
*** Bug 42435 has been marked as a duplicate of this bug. ***
Thanks for the report. This was already fixed in TC6 with an alternative patch so I ported the TC6 fix to TC5. I also added the code to close the input streams to TC5 and TC6.