The TooManyClauses exception is due to the prefix query being rewritten to
a boolean query that exceeds the boolean queries maximum number of clauses.
Its an unchecked exception from the search method that you should probably
explicitly catch and then return a helpful message to the user maybe
suggesting they refine their search?
try
{
Hits h = searcher.search(query, filter, sort);
}
catch (TooManyClauses e)
{
// return a msg to user that the query was too general
}
Regards
Paul I.
"Daniel Pfeifer"
<[EMAIL PROTECTED]
radedoubler.com> To
<java-user@lucene.apache.org>
24/01/2006 13:52 cc
Subject
Please respond to Two strange things in Lucene
[EMAIL PROTECTED]
apache.org
Today I've been alerted by one of my collegues that our Lucene-based
indexing solution no longer refreshes the searchers and thus we never
get any new indexed documents.
Since I didn't find anything in the log from log4j I did a "kill -3" on
the process and found two very interesting things:
Almost all multisearcher threads were in this state:
"MultiSearcher thread #1" daemon prio=10 tid=0x0000000001900960
nid=0x81442c waiting for monitor entry
[0xfffffd7d269ff000..0xfffffd7d269ffb50]
at java.util.Vector.size(Vector.java:270)
- waiting to lock <0xfffffd7f0114ea28> (a java.util.Vector)
at
org.apache.lucene.search.BooleanQuery$BooleanWeight.<init>(BooleanQuery.
java:95)
at
org.apache.lucene.search.BooleanQuery.createWeight(BooleanQuery.java:220
)
at
org.apache.lucene.search.BooleanQuery$BooleanWeight.<init>(BooleanQuery.
java:97)
at
org.apache.lucene.search.BooleanQuery.createWeight(BooleanQuery.java:220
)
at org.apache.lucene.search.Query.weight(Query.java:85)
at
org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:85)
at
org.apache.lucene.search.MultiSearcherThread.run(ParallelMultiSearcher.j
ava:251)
And, additionally I found another stacktrace in the stdout-log which I
find interesting:
Exception in thread "MultiSearcher thread #1"
org.apache.lucene.search.BooleanQuery$TooManyClauses
at
org.apache.lucene.search.BooleanQuery.add(BooleanQuery.java:79)
at
org.apache.lucene.search.BooleanQuery.add(BooleanQuery.java:71)
at
org.apache.lucene.search.PrefixQuery.rewrite(PrefixQuery.java:50)
at
org.apache.lucene.search.BooleanQuery.rewrite(BooleanQuery.java:243)
at
org.apache.lucene.search.BooleanQuery.rewrite(BooleanQuery.java:243)
at
org.apache.lucene.search.IndexSearcher.rewrite(IndexSearcher.java:166)
at org.apache.lucene.search.Query.weight(Query.java:84)
at
org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:85)
at
org.apache.lucene.search.MultiSearcherThread.run(ParallelMultiSearcher.j
ava:251)
Has anyone ever seen these errors and knows why they might occour?
Thanks in advance,
Daniel Pfeifer
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