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I am using log4j to log my exceptions. I want to log whatever I get in e.printStackTrace();
My code looks like this:
try {
} catch(Exception e) {
log.error("Exception is:::" + e);
}
But the content I get logged looks like this:
2012-02-02 12:47:03,227 ERROR [com.api.bg.sample] - Exception in unTech:::[Ljava.lang.StackTraceElement;@6ed322
2012-02-02 12:47:03,309 ERROR [com.api.bg.sample] - Exception is :::java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
But the content I expect is:
java.io.IOException: Not in GZIP format
at java.util.zip.GZIPInputStream.readHeader(Unknown Source)
at java.util.zip.GZIPInputStream.<init>(Unknown Source)
at java.util.zip.GZIPInputStream.<init>(Unknown Source)
at com.api.bg.sample.unGZIP(sample.java:191)
at com.api.bg.sample.main(sample.java:69)
I tried e.getMessage(), e.getStackTrace(); however I don't get the full stacktrace. Any suggestions?
808
StackTrace to String with StringWriter Print throwable stack trace and its backtrace to the PrintWriter. Copy print writer content to StringWriter. Use StringWriter. toString() to get stack trace in string format.
Therefore, you should log a stacktrace if, and only if, and always if, the exception indicates a bug in the program. However, that does not always indicate that a method you write should catch and log the exception.
To simplify the accepted answer let us consider a simple notation. Hence you have the entire stack. But MAKE SURE CHECK BOX FOR “limit console output” is NOT checked under run/debug drop down --> console in eclipse preferences. You can use the following code to get more clarity.
You have to use the two argument form
log.error("my logging message", exception)
See http://www.devdaily.com/blog/post/java/how-print-exception-stack-trace-using-log4j-commons for more details.
106
Change your logging statement to:
log.error("Exception is: ", e);
It is actualy log4j that prevents the printing of the fulltime stacktrace. You should however set the exception as a second parameter for the error method.
4
If you use the below than e.toString() will be called which calls e.getMessage()
log.error("Exception is:::" + e);
However, to print full stack trace you can use the below:
log.error("Exception is:::" + ExceptionUtils.getStackTrace(e));
where ExceptionUtils is imported as org.apache.commons.lang3.exception.ExceptionUtils
1
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