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Posted to dev@lucene.apache.org by "Ruben Inoto (Closed) (JIRA)" <ji...@apache.org> on 2011/10/03 20:11:35 UTC
[jira] [Closed] (SOLR-2801) IndexNotFoundException thrown when the
index directory has no segments file
[ https://issues.apache.org/jira/browse/SOLR-2801?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ruben Inoto closed SOLR-2801.
-----------------------------
Resolution: Not A Problem
> IndexNotFoundException thrown when the index directory has no segments file
> ---------------------------------------------------------------------------
>
> Key: SOLR-2801
> URL: https://issues.apache.org/jira/browse/SOLR-2801
> Project: Solr
> Issue Type: Bug
> Components: search
> Affects Versions: 3.4
> Reporter: Ruben Inoto
> Priority: Trivial
>
> If the directory where the index is stored gets somehow corrupted, and it becomes empty or the segments files are deleted, any attempt to access the Solr server (via /select, /update, etc..) will throw the following exception:
> {code}
> org.apache.lucene.index.IndexNotFoundException: no segments* file found in org.apache.lucene.store.NIOFSDirectory@/index_dir
> {code}
> The only workaround we have found is to stop the server, remove the /index directory, and start again.
> We have found more useful to create a new implementation of the IndexReaderFactory (that extends StandardIndexReaderFactory), that, in case of a IndexNotFoundException, it tries to "fix" the index directory by opening an IndexWriter on it and doing a commit:
> {code}
> @Override
> public IndexReader newReader(Directory indexDir, boolean readOnly) throws IOException {
> try {
> return super.newReader(indexDir, readOnly);
> } catch (IndexNotFoundException e) {
> logger.warn(
> "Warning: Trying to get a new reader threw an exception. Trying to create a writer first, and then get the reader",
> e);
> IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_34, new WhitespaceAnalyzer(
> Version.LUCENE_34));
> config.setOpenMode(OpenMode.CREATE_OR_APPEND);
> IndexWriter writer = new IndexWriter(indexDir, config);
> writer.commit();
> writer.close();
> try {
> return super.newReader(indexDir, readOnly);
> } catch (IndexNotFoundException e2) {
> logger.error(
> "Trying to commit in the writer didn't work, as the reader is still throwing an exception :(. Re-throwing exception",
> e2);
> throw e2;
> }
> }
> }
> {code}
> Would it make sense to add something like this to the StandardIndexReaderFactory?
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