[ http://issues.apache.org/jira/browse/NUTCH-280?page=all ]
Grant Glouser updated NUTCH-280:
--------------------------------
Component: searcher
Summary: url query causes NullPointerException (was: url query causes
Null)
Description:
A search such as "url:java.sun.com" causes a NullPointerException.
The cause is setConf() in URLQueryFilter (in the query-url plugin) that
overrides FieldQueryFilter.setConf(), but does not call super.setConf(). The
superclass, FieldQueryFilter, depends on setConf in order to initialize its
commonGrams. When FieldQueryFilter tries to access commonGrams later on, it
throws a NullPointerException.
This bug only affects phrase URL queries, so a simple URL query like url:sun
would not hit it.
Here is a simple patch which fixes this problem. An alternative would be to
remove all configuration fields and methods from URLQueryFilter since it does
not use them.
Index:
src/plugin/query-url/src/java/org/apache/nutch/searcher/url/URLQueryFilter.java
===================================================================
---
src/plugin/query-url/src/java/org/apache/nutch/searcher/url/URLQueryFilter.java
(revision 1260)
+++
src/plugin/query-url/src/java/org/apache/nutch/searcher/url/URLQueryFilter.java
(working copy)
@@ -31,6 +31,7 @@
}
public void setConf(Configuration conf) {
+ super.setConf(conf);
this.conf = conf;
}
Version: 0.8-dev
> url query causes NullPointerException
> -------------------------------------
>
> Key: NUTCH-280
> URL: http://issues.apache.org/jira/browse/NUTCH-280
> Project: Nutch
> Type: Bug
> Components: searcher
> Versions: 0.8-dev
> Reporter: Grant Glouser
>
> A search such as "url:java.sun.com" causes a NullPointerException.
> The cause is setConf() in URLQueryFilter (in the query-url plugin) that
> overrides FieldQueryFilter.setConf(), but does not call super.setConf(). The
> superclass, FieldQueryFilter, depends on setConf in order to initialize its
> commonGrams. When FieldQueryFilter tries to access commonGrams later on, it
> throws a NullPointerException.
> This bug only affects phrase URL queries, so a simple URL query like url:sun
> would not hit it.
> Here is a simple patch which fixes this problem. An alternative would be to
> remove all configuration fields and methods from URLQueryFilter since it does
> not use them.
> Index:
> src/plugin/query-url/src/java/org/apache/nutch/searcher/url/URLQueryFilter.java
> ===================================================================
> ---
> src/plugin/query-url/src/java/org/apache/nutch/searcher/url/URLQueryFilter.java
> (revision 1260)
> +++
> src/plugin/query-url/src/java/org/apache/nutch/searcher/url/URLQueryFilter.java
> (working copy)
> @@ -31,6 +31,7 @@
> }
>
> public void setConf(Configuration conf) {
> + super.setConf(conf);
> this.conf = conf;
> }
>
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