Logging a stacktrace 


try {
     Something that throws an Exception
} catch (final XxxException e) {
     LOG.error("Some message", e);
}

or 

try {
     Something that throws an Exception
} catch (final XxxException e) {
     final StringWriter w = new StringWriter(10000);
     final PrintWriter pw = new PrintWriter(w);
     e.printStackTrace(pw);
     // Do something with 'w' which now 
     // contains the formatted stacktrace
}

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