Stack pattern can be enabled or disabled via the context menu in the Breakpoints View, or via the context menu in the Java Editor ruler.
If stack pattern is enabled, the Java breakpoint is only hit when the stopping stack frames match the specified stack pattern. A Java breakpoint with stack pattern enabled is indicated by a string [Stack Pattern] shown on the breakpoint's label in the Breakpoints View.
You can create or modify the stack pattern for a Java breakpoint from its Stack Pattern properties page. Stack pattern can also be imported from the currently suspended thread or from an exception stack trace.