I have been doing some reading and think something that I am doing icould be
a problem. For each search of an index, I first check to see if the
IndexReader is current and if not reopen it... I think I should not reopen
the IndexReader until I make sure that there are no other queries running
using this searcher/reader. Could this be causing my Input/Output error?
Michael McCandless-2 wrote:
>
>
> What OS/filesystem are you using?
>
> The code looks fine to me. 2 or more searches running at the same
> time on the same index should be harmless; this happens in Lucene all
> the time in normal applications.
>
> Are you sure you're re-using already opened Searchers, and not
> accidentally opening a new searcher per user's search?
>
> Is it possible you are running out of file descriptors? That
> IOException (generic Input/output error) means there is a low level IO
> issue.
>
> Mike
>
> JulieSoko wrote:
>
>>
>> Hello All,
>> First of all I’m new to Lucene, and have written code using it to
>> search
>> over 1 to man indexes, using a user defined query.
>> I don't have any code on this system so have to type everything in
>> here...
>> I have the following design but am getting
>> An Input / Output error exception which I have typed in a part of it
>> below.
>> My question is this? Do I have glaring flaw
>> In this design? I am reusing the IndexSearchers/IndexReaders and not
>> closing them. The input/output error arises when 2 or
>> More searches occur at the same time over some of the same indexes.
>> Can you
>> give me some direction where I should look
>> For the solution to the exception?
>>
>> Here is an explanation of my
>> Data:
>> Up to 60 different indexes used at a time
>> 1 directory per 1 day of data
>> Millions of documents per day
>> Data is received and indexes merged on a continual bases -
>> whole
>> separate process
>>
>> Index contains
>> value: content eventType: type of data eventTime:
>> time data
>> collected
>>
>> 1 to many users can create individual queries containing 1 or
>> more of
>> the fields and values
>> searching over 1 to many indexes
>>
>> Design:
>> Utilize the IndexAccessor classes to cache
>> IndexSearcher/IndexReaders i.e. they are made one per index and never
>> closed.
>>
>>
>> Use a ParallelMultiSearcher - create one per request using
>> 1 to
>> many of the indexes
>>
>> try {
>> QueryParser parser = new QueryParser("value", new
>> StandardAnalyzer(0);
>> parser.setDefaultOperator(QueryParser.AND_OPERATOR);
>> Query query = parser.parse(queryString);
>>
>> TopDocCollector col = new TopDocCollector(MAX_NUMBER_HITS);
>> multiSearcher.search(query, new
>> RangeFilter("eventTime",startTime,endTime,true,true),col);
>> int numHits = col.getTotalHits(0);
>> TopDocs docs = col.topDocs();
>>
>> if (numHits > 0))
>> for (int i=0; i< numHits && i< MAX_NUMBER_HITS; i++)[
>> Document doc = multiSearcher.doc(docs.scoreDocs[i].doc);
>> ....
>> }
>>
>> }catch(Exception e ){
>> e.printStackTrace();
>> } finally{
>> //IndexSearchers are not closed since shared by many users
>> }
>>
>>
>>
>>
>> When the second user accesses directories used by the first query
>> then I get
>> the following error:
>>
>> java.io.IOException: Input/output error
>> java.io.RandomAccessFile.readBytes(Native Method)
>> java.io.RandomAccessFile.read(RandomAccessFile.java:315)
>> at
>> org.apache.lucene.store.FSDirecotry
>> $FSIndexInput.readInternal(FSDirectory.java:550)
>> at
>> org
>> .apache
>> .lucene.store.BufferedIndexInput.readBytes(BufferedInputInput.java:
>> 131)
>> at
>> org.apache.lucene.index.CompoundFileReader
>> $CSIndexInput.readInternal(CompoundFileReader.java:240)
>> at
>> org
>> .apache
>> .lucene.instoreBufferedIndexInput.refill(BufferedIndexInput.java:
>> 152)
>> at
>> org
>> .apache
>> .lucene.instoreBufferedIndexInput.readByte(BufferedIndexInput.java:
>> 152)
>> at org.lucene.store.IndexInput.readVInt(IndexInput.java:76)
>> at org.apache.lucene.index.TermBuffer.read(TermBuffer.java:63)
>> at org.apache.lucene.index.SegmentTermEnum.next(SegmentTermEnum.java:
>> 123)
>> at
>> org.apache.lucene.index.SegmentTermEnum.scanTo(SegmentTermEnum.java:
>> 154)
>> at
>> org
>> .apache.lucene.index.TermInfosReader.scanEnum(TermInfosReader.java:
>> 223)
>> at org.apache.lucene.index.TermInfosReader.get(TermInfosReader.java:
>> 217)
>> at org.apache.lucene.index.SegmentReader.docFreq(SegmentReader.java:
>> 678)
>> at org.apache.lucene.search.IndexSearcher.docFreq(IndexSearcher.java:
>> 87)
>> at org.apache.lucene.search.Searcher.docFreqs(searcher.java:118)
>> at
>> org
>> .apache.lucene.search.MultiSearcher.createWeight(MultiSearcher.java:
>> 311)
>> at org.apache.lucene.search.Searcher.search(Searcher.java:178)
>>
>> Thanks!
>>
>> --
>> View this message in context:
>> http://www.nabble.com/Lucene-Input-Output-error-tp20156805p20156805.html
>> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>>
>>
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