How Does Java Know Which Catch Clause to Use
Camel will fallback to use the one defined on Dead Letter Channel if any if none exists on the Exception Clause. If execution of the try block completes abruptly because of a throw of a value V then there is a choice.
The Java Language Specification says in section 14191.
![](https://www.softwaretestinghelp.com/wp-content/qa/uploads/2018/09/Class-ExcepDemo-with-Exception-Handling.png)
. See Dead Letter Channel for more details on onRedelivery. If the run-time type of V is assignable to the Parameter of any catch clause of the try statement then the first leftmost such catch clause is selected. Race condition in Java may occur in a multi-threaded language like Java when two or more threads try to access a shared resourceIf all the threads are just reading a shared object that poses no problem but modifying or writing a value.
In Camel 20 we have added this feature to Exception Clause as well so you can use per exception scoped on redelivery. The catch statements wouldnt really be a problem since by the time a catch statement could execute the system would have rolled back the effects of whatever had tried to use two much stack space. It can be used to add some customer header or whatnot.
Theres no reason catching stack overflow exceptions would have to be dangerous.
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