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http://issues.apache.org/bugzilla/show_bug.cgi?id=41219 Summary: Stacktraces of exceptions disappear occsionally Product: Log4j Version: 1.2 Platform: Other OS/Version: other Status: NEW Severity: major Priority: P2 Component: Appender AssignedTo: [email protected] ReportedBy: [EMAIL PROTECTED] Sometimes stacktraces of the exceptions seem to mysteriously disappear. After invesigation I noticed thatThrowableInformation.VectorWriter looks potentially unrobust, since it's making strong assumptions of what methods of the PrintWriter API Throwable is using for printing its' stacktrace. For example, if Throwable uses some "write(int)" method then stacktrace goes appearently into /dev/null. It's completely possible that some sub-class of Throwable overrides printStackTrace() -logic, so API shouldn't make assumptions based into implementation details inside Throwable (Throwable itself could change also logic, like has happened earlier). This issue reduces reliability of Log4J considerably. PROOF: --------------------- package org.kari; import java.io.PrintWriter; import org.apache.log4j.BasicConfigurator; import org.apache.log4j.Logger; public class ThrowableTest { public static final class ThrowableFail extends Throwable { @Override public void printStackTrace(PrintWriter s) { super.printStackTrace(s); s.println("LOST-START"); // Following output is lost for (int i= 0; i < 100; i++) { s.print('a'); } s.println("LOST-END"); } } public static void main(String[] args) { BasicConfigurator.configure(); Logger LOG = Logger.getLogger(ThrowableTest.class); LOG.info("Test", new ThrowableFail()); } } --------------------- -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
