[SYSTEMDS-625] Handle circular import references

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: SystemML 0.10
• Component/s: Parser
• Assignee: Glenn Weidner
• Reporter: Jon Deron Eriksson
• Created: 11/Apr/16 20:03
• Updated: 05/May/16 16:35
• Resolved: 23/Apr/16 00:30

Description

Suppose we have a DML file named "example.dml" that contains a source call to itself:

source("./example.dml") as example;

This produces an infinite loop that gives:

Exception in thread "main" java.lang.StackOverflowError

Similar error occurs for other types of circular references such as script1 imports script2 imports script3 imports1.