Custom Runtime exception not printing the stack trace

Question

Sorry for this very basic question, but I am stuck with this and m not able to find a solution.

I have a Core Java application (Java version is 1.6). From my application I am calling a method in a jar, which is throwing a custom runtime exception.

I am not catching this exception, but still JVM is not printing the stack trace.

Does JVM by default will not print the stack trace, when a runtime exception is thrown and not caught? Or am I missing something which I can check?

Thanks in advance.

-Sandeep

Check the method inside the jar. You can use a java decompiler if you don't have source code inside the jar. — Zeeshan
– Zeeshan, Commented Sep 29, 2015 at 8:04
I have access to the code of jar, and even it does not catch any exceptions. It is only throwing runtime exception when certain condition is met. — Sandeep
– Sandeep, Commented Sep 29, 2015 at 8:08
It's possible to subclass Exception(String message,..., boolean writableStackTrace), i.e., whether or not the stack trace should be writable. — laune
– laune, Commented Sep 29, 2015 at 8:13
And I've just checked: catching and calling printStackTrace doesn't work, and getStackTrace gives you nothing. - If you have the code, you can see how the custom exception is defined, whether my assumption is correct. class Custom extends Exception { public Custom( String msg ){ super( msg, null, false, **false** ); } } -- The last false is the one. — laune
– laune, Commented Sep 29, 2015 at 8:21

pkalinow · Accepted Answer · 2015-09-29 08:16:02Z

0

AFAIK, JRE should print a stacktrace of an uncaught exception. But you can always do it yourself:

try {
  someObject.someMethod();
} catch (Throwable t) {
  t.printStackTrace();
  throw t;
}

answered Sep 29, 2015 at 8:16

pkalinow

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1 Comment

pkalinow Over a year ago

You mean writableStackTrace set to false, as in a comment to the question? In that case, it's true.

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