StackOverflow error on Regular expression in DLP

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Article ID: 184879

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Updated On:

Products

Data Loss Prevention Network Prevent for Email

Issue/Introduction

You are using regular expressions to analyse data loss scenarios in email.

The FileReader logs show this type of entry:

Class: com.vontu.messaging.chain.MessageChain Method: run Level: SEVERE Message: Message chain #5 encountered an unexpected error processing a message. java.lang.StackOverflowError at java.util.regex.Pattern$Branch.match(Pattern.java:4606) at java.util.regex.Pattern$GroupHead.match(Pattern.java:4660) at java.util.regex.Pattern$Loop.match(Pattern.java:4787) at java.util.regex.Pattern$GroupTail.match(Pattern.java:4719)

Cause

An errant regular expression in one of the active policies

Environment

14.6 MP3, other environments may also be affected

Resolution

This was identified by deactivating 50% of the policies then retesting. Iterating this process until the policy was identified and then taking the same approach with the Regular Expressions within that policy.