I'm working on a similar project...
Make sure that only one call to the index method is occuring at
a time. Synchronizing that method should do it.
--- Luke Shannon <[EMAIL PROTECTED]> wrote:
> Hi All;
>
> I have hit a snag in my Lucene integration and don't know what
> to do.
>
> My company has a content management product. Each time
> someone changes the
> directory structure or a file with in it that portion of the
> site needs to
> be re-indexed so the changes are reflected in future searches
> (indexing
> must
> happen during run time).
>
> I have written a Indexer class with a static Index() method.
> The idea is
> too
> call the method every time something changes and the index
> needs to be
> re-examined. I am hoping the logic put in by Doug Cutting
> surrounding the
> UID will make indexing efficient enough to be called so
> frequently.
>
> This class works great when I tested it on my own little site
> (I have about
> 2000 file). But when I drop the functionality into the QA
> environment I get
> a locking error.
>
> I can't access the stack trace, all I can get at is a log
> file the
> application writes too. Here is the section my class wrote.
> It was right in
> the middle of indexing and bang lock issue.
>
> I don't know if the problem is in my code or something in the
> existing
> application.
>
> Error Message:
> ENTER|SearchEventProcessor.visit(ContentNodeDeleteEvent)
> |INFO|INDEXING INFO: Start Indexing new content.
> |INFO|INDEXING INFO: Index Folder Did Not Exist. Start
> Creation Of New
> Index
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING INFO: Beginnging Incremental update
> comparisions
> |INFO|INDEXING ERROR: Unable to index new content Lock obtain
> timed out:
>
>
Lock@/usr/tomcat/jakarta-tomcat-5.0.19/temp/lucene-398fbd170a5457d05e2f4d432
> 10f7fe8-write.lock
>
> |ENTER|UpdateCacheEventProcessor.visit(ContentNodeDeleteEvent)
>
> Here is my code. You will recognize it pretty much as the
> IndexHTML class
> from the Lucene demo written by Doug Cutting. I have put a
> ton of comments
> in a attempt to understand what is going on.
>
> Any help would be appreciated.
>
> Luke
>
> package com.fbhm.bolt.search;
>
> /*
> * Created on Nov 11, 2004
> *
> * This class will create a single index file for the Content
> * Management System (CMS). It contains logic to ensure
> * indexing is done "intelligently". Based on IndexHTML.java
> * from the demo folder that ships with Lucene
> */
>
> import java.io.File;
> import java.io.IOException;
> import java.util.Arrays;
> import java.util.Date;
>
> import org.apache.lucene.analysis.standard.StandardAnalyzer;
> import org.apache.lucene.document.Document;
> import org.apache.lucene.index.IndexReader;
> import org.apache.lucene.index.IndexWriter;
> import org.apache.lucene.index.Term;
> import org.apache.lucene.index.TermEnum;
> import org.pdfbox.searchengine.lucene.LucenePDFDocument;
> import org.apache.lucene.demo.HTMLDocument;
>
> import com.alaia.common.debug.Trace;
> import com.alaia.common.util.AppProperties;
>
> /**
> * @author lshannon Description: <br
> * This class is used to index a content folder. It
> contains logic to
> * ensure only new or documents that have been modified
> since the last
> * search are indexed. <br
> * Based on code writen by Doug Cutting in the IndexHTML
> class found in
> * the Lucene demo
> */
> public class Indexer {
> //true during deletion pass, this is when the index already
> exists
> private static boolean deleting = false;
>
> //object to read existing indexes
> private static IndexReader reader;
>
> //object to write to the index folder
> private static IndexWriter writer;
>
> //this will be used to write the index file
> private static TermEnum uidIter;
>
> /*
> * This static method does all the work, the end result is
> an up-to-date
> index folder
> */
> public static void Index() {
> //we will assume to start the index has been created
> boolean create = true;
> //set the name of the index file
> String indexFileLocation =
>
>
AppProperties.getPropertyAsString("bolt.search.siteIndex.index.root");
> //set the name of the content folder
> String contentFolderLocation =
> AppProperties.getPropertyAsString("site.root");
> //manage whether the index needs to be created or not
> File index = new File(indexFileLocation);
> File root = new File(contentFolderLocation);
> //the index file indicated exists, we need an incremental
> update of the
> // index
> if (index.exists()) {
> Trace.TRACE("INDEXING INFO: An index folder exists at: " +
> indexFileLocation);
> deleting = true;
> create = false;
> try {
> //this version of index docs is able to execute the
> incremental
> // update
> indexDocs(root, indexFileLocation, create);
> } catch (Exception e) {
> //we were unable to do the incremental update
> Trace.TRACE("INDEXING ERROR: Unable to execute
> incremental update "
> + e.getMessage());
> }
> //after exiting this loop the index should be current with
> content
> Trace.TRACE("INDEXING INFO: Incremental update
> completed.");
> }
> try {
> //create the writer
> writer = new IndexWriter(index, new StandardAnalyzer(),
> create);
> //configure the writer
> writer.mergeFactor = 10000;
> writer.maxFieldLength = 100000;
> try {
> //get the start date
> Date start = new Date();
> //call the indexDocs method, this time we will add new
> // documents
> Trace.TRACE("INDEXING INFO: Start Indexing new
> content.");
> indexDocs(root, indexFileLocation, create);
> Trace.TRACE("INDEXING INFO: Indexing new content
> complete.");
> //optimize the index
> writer.optimize();
> //close the writer
> writer.close();
> //get the end date
> Date end = new Date();
> long totalTime = end.getTime() - start.getTime();
> Trace.TRACE("INDEXING INFO: All Indexing Operations
> Completed in "
> + totalTime + " milliseconds");
> } catch (Exception e1) {
> //unable to add new documents
> Trace.TRACE("INDEXING ERROR: Unable to index new content
> "
> + e1.getMessage());
> }
> } catch (IOException e) {
> Trace.TRACE("INDEXING ERROR: Unable to create IndexWriter
> "
> + e.getMessage());
> }
> }
>
> /*
> * Walk directory hierarchy in uid order, while keeping uid
> iterator from
> /*
> * existing index in sync. Mismatches indicate one of: (a)
> old documents
> to
> /*
> * be deleted; (b) unchanged documents, to be left alone; or
> (c) new /*
> * documents, to be indexed.
> */
>
> private static void indexDocs(File file, String index,
> boolean create)
> throws Exception {
> //the index already exists we do an incremental update
> if (!create) {
> Trace.TRACE("INDEXING INFO: Incremental Update Request
> Confirmed");
> //open existing index
> reader = IndexReader.open(index);
> //this gets an enummeration of uid terms
> uidIter = reader.terms(new Term("uid", ""));
> //jump to the index method that does the work
> //this will use the Iteration above and does
> //all the "smart" indexing
> indexDocs(file);
> //this will be true everytime the index already existed
> //we are not going to delete documents that are old
> if (deleting) {
> Trace.TRACE("INDEXING INFO: Deleting Old Content Phase
> Started. All
> Deleted Docs will be listed.");
> while (uidIter.term() != null
> && uidIter.term().field() == "uid") {
> //basically we are deleting all the document we have
> // indexed before
> Trace.TRACE("INDEXING INFO: Deleting document "
> + HTMLDocument.uid2url(uidIter.term().text()));
> //delete the term from the reader
> reader.delete(uidIter.term());
> //go to the nextfield
> uidIter.next();
> }
> Trace.TRACE("INDEXING INFO: Deleting Old Content Phase
> Completed");
> //turn off the deleting flag
> deleting = false;
> }//close the deleting branch
> //close the enummeration
> uidIter.close(); // close uid iterator
> //close the reader
> reader.close(); // close existing index
>
> }
> //we go here is the index already existed
> else {
> Trace.TRACE("INDEXING INFO: Index Folder Did Not Exist.
> Start Creation
> Of
> New Index");
> // don't have exisiting
> indexDocs(file);
> }
> }
>
> private static void indexDocs(File file) throws Exception {
> //check if we are at the top of a directory
> if (file.isDirectory()) {
> //get a list of the files
> String[] files = file.list();
> //sort them
> Arrays.sort(files);
> //index each file in the directory recursively
> //we keep repeating this logic until we hit a
> //file
> for (int i = 0; i < files.length; i++)
> //pass in the parent directory and the current file
> //into the file constructor and index
> indexDocs(new File(file, files[i]));
>
> }
> //we have an actual file, so we need to consider the
> //file extensions so the correct Document is created
> else if (file.getPath().endsWith(".html")
> || file.getPath().endsWith(".htm")
> || file.getPath().endsWith(".txt")
> || file.getPath().endsWith(".doc")
> || file.getPath().endsWith(".xml")
> || file.getPath().endsWith(".pdf")) {
>
> //if this is reached it means we were in the midst
> //of an incremental update
> if (uidIter != null) {
> //get the uid for the document we are on
> String uid = HTMLDocument.uid(file);
> //now compare this document to the one we have in the
> //enummeration of terms.
> //if the term in the enummeration is less than the
> //term we are on it must be deleted (if we are indeed
> //doing an incrementatal update)
> Trace.TRACE("INDEXING INFO: Beginnging Incremental update
> comparisions");
> while (uidIter.term() != null
> && uidIter.term().field() == "uid"
> && uidIter.term().text().compareTo(uid) < 0) {
> //delete stale docs
> if (deleting) {
> reader.delete(uidIter.term());
> }
> uidIter.next();
> }
> //if the terms are equal there is no change with this
> document
> //we keep it as is
> if (uidIter.term() != null && uidIter.term().field() ==
> "uid"
> && uidIter.term().text().compareTo(uid) == 0) {
> uidIter.next();
> }
> //if we are not deleting and the document was not there
> //it means we didn't have this document on the last index
> //and we should add it
> else if (!deleting) {
> if (file.getPath().endsWith(".pdf")) {
> Document doc = LucenePDFDocument.getDocument(file);
> Trace.TRACE("INDEXING INFO: Adding new document to the
> existing
> index:
> "
> + doc.get("url"));
> writer.addDocument(doc);
> } else if (file.getPath().endsWith(".xml")) {
> Document doc = XMLDocument.Document(file);
> Trace.TRACE("INDEXING INFO: Adding new document to the
> existing
> index:
> "
> + doc.get("url"));
> writer.addDocument(doc);
> } else {
> Document doc = HTMLDocument.Document(file);
> Trace.TRACE("INDEXING INFO: Adding new document to the
> existing
> index:
> "
> + doc.get("url"));
> writer.addDocument(doc);
> }
> }
> }//end the if for an incremental update
> //we are creating a new index, add all document types
> else {
> if (file.getPath().endsWith(".pdf")) {
> Document doc = LucenePDFDocument.getDocument(file);
> Trace.TRACE("INDEXING INFO: Adding a new document to the
> new index: "
> + doc.get("url"));
> writer.addDocument(doc);
> } else if (file.getPath().endsWith(".xml")) {
> Document doc = XMLDocument.Document(file);
> Trace.TRACE("INDEXING INFO: Adding a new document to the
> new index: "
> + doc.get("url"));
> writer.addDocument(doc);
> } else {
> Document doc = HTMLDocument.Document(file);
> Trace.TRACE("INDEXING INFO: Adding a new document to the
> new index: "
> + doc.get("url"));
> writer.addDocument(doc);
> }//close the else
> }//close the else for a new index
> }//close the else if to handle file types
> }//close the indexDocs method
>
> }
>
>
> ----- Original Message -----
> From: "Craig McClanahan" <[EMAIL PROTECTED]
> To: "Jakarta Commons Users List"
> <[EMAIL PROTECTED]
> Sent: Thursday, November 11, 2004 6:13 PM
> Subject: Re: avoiding locking
>
>
> In order to get any useful help, it would be nice to know
> what you are
> trying to do, and (most importantly) what commons component
> is giving
> you the problem :-). The traditional approach is to put a
> prefix on
> your subject line -- for commons package "foo" it would be:
>
> [foo] avoiding locking
>
> It's also generally helpful to see the entire stack trace,
> not just
> the exception message itself.
>
> Craig
>
>
> On Thu, 11 Nov 2004 17:27:19 -0500, Luke Shannon
> <[EMAIL PROTECTED] wrote:
> What can I do to avoid locking issues?
>
> Unable to execute incremental update Lock obtain timed out:
>
>
Lock@/usr/tomcat/jakarta-tomcat-5.0.19/temp/lucene-398fbd170a5457d05e2f4d432
> 10f7fe8-write.lock
>
> Thanks,
>
> Luke
>
>
>
>
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