[SANDBOX-477] StackOverflowError because hash code used in debug messages

• Type: Bug
• Status: Open
• Priority: Critical
• Resolution: Unresolved
• Component/s: Javaflow
• Assignee: Unassigned
• Reporter: Marek Handl
• Created: 06/Jun/14 14:13
• Updated: 06/Jun/14 14:13

Description

JavaFlow often uses hash codes of objects in debug log messages. When the object is a map that contains a reference to itself, an infinite loop occurs which ends with a StackOverflowError exception.

Although Java specs says that extreme caution is advised when having a map contain itself as a value, JavaFlow should not do any assumption about data it needs to work with and should be able to deal with such a situation.

The hash code is computed in
org.apache.commons.javaflow.utils.ReflectionUtils.getClassName(final Object o) which is called e.g. from org.apache.commons.javaflow.bytecode.Stack.pushObject(Object o).

Possible workaround is to disable debug messages.