[NUTCH-1385] More robust plug-in order properties in "nutch-site.xml"

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.5
• Fix Version/s: 1.6
• Component/s: indexer, parser
• Labels: filter
• Patch Info: Patch Available
• Assignee: Markus Jelsma
• Reporter: Andy Xue
• Created: 11/Jun/12 07:17
• Updated: 22/May/13 03:53
• Resolved: 11/Jun/12 09:28

Description

When listing multiple scoring filters in certain properties (listed below) in "nutch-site.xml", it is vital that no spaces/newlines/tabs are placed in front of the value content.

E.g.:
This is fine:
<value>org.apache.nutch.scoring.opic.OPICScoringFilter myFilter</value>

Either of these will generate an exception:
<value> org.apache.nutch.scoring.opic.OPICScoringFilter myFilter</value>
<value>
org.apache.nutch.scoring.opic.OPICScoringFilter
myFilter
</value>

Affects these properties in "nutch-site.xml":

• indexingfilter.order
• urlnormalizer.order
• urlfilter.order
• htmlparsefilter.order
• scoring.filter.order

Solution: replaced

{order.split("\\s+")}

to

{order.trim().split("\\s+")}

. Patch provided.