[jira] (MINDEXER-44) NPE from DefaultSearchEngine.doSearchWithCeiling

["Milos Kleint (JIRA)" <ji...@codehaus.org>]

    [ https://jira.codehaus.org/browse/MINDEXER-44?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=300289#comment-300289 ] 

Milos Kleint commented on MINDEXER-44:
--------------------------------------

a similar issue occurred in http://netbeans.org/bugzilla/show_bug.cgi?id=213466

The initial problem in this case seems to be this stacktrace:
java.lang.NullPointerException
    at org.apache.lucene.store.Directory.copy(Directory.java:200)
    at
org.apache.maven.index.context.IndexUtils.copyDirectory(IndexUtils.java:51)
    at
org.apache.maven.index.context.DefaultIndexingContext.replace(DefaultIndexingContext.java:832)
    at
org.apache.maven.index.updater.DefaultIndexUpdater.loadIndexDirectory(DefaultIndexUpdater.java:218)
    at
org.apache.maven.index.updater.DefaultIndexUpdater.access$300(DefaultIndexUpdater.java:76)
    at
org.apache.maven.index.updater.DefaultIndexUpdater$LuceneIndexAdaptor.setIndexFile(DefaultIndexUpdater.java:642)
    at
org.apache.maven.index.updater.DefaultIndexUpdater.fetchAndUpdateIndex(DefaultIndexUpdater.java:879)
    at
org.apache.maven.index.updater.DefaultIndexUpdater.fetchAndUpdateIndex(DefaultIndexUpdater.java:157)
    at
org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.indexLoadedRepo(NexusRepositoryIndexerImpl.java:498)
    at
org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.loadIndexingContext(NexusRepositoryIndexerImpl.java:288)
    at
org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.access$300(NexusRepositoryIndexerImpl.java:139)
    at
org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$2.run(NexusRepositoryIndexerImpl.java:540)
    at
org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$2.run(NexusRepositoryIndexerImpl.java:531)
    at org.openide.util.Mutex.writeAccess(Mutex.java:397)
    at
org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.indexRepo(NexusRepositoryIndexerImpl.java:531)
    at
org.netbeans.modules.maven.indexer.api.RepositoryIndexer.indexRepo(RepositoryIndexer.java:62)
    at
org.netbeans.modules.maven.ProjectOpenedHookImpl$1.run(ProjectOpenedHookImpl.java:202)
    at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1411)
[catch] at
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1991)


                
> NPE from DefaultSearchEngine.doSearchWithCeiling
> ------------------------------------------------
>
>                 Key: MINDEXER-44
>                 URL: https://jira.codehaus.org/browse/MINDEXER-44
>             Project: Maven Indexer
>          Issue Type: Bug
>    Affects Versions: 4.1.1
>            Reporter: Jesse Glick
>            Assignee: Olivier Lamy
>            Priority: Minor
>             Fix For: 4.1.3
>
>
> http://netbeans.org/bugzilla/show_bug.cgi?id=202138 reports http://statistics.netbeans.org/exceptions/messageslog?id=533660 which shows
> {code}
> java.lang.NullPointerException
> 	at org.apache.maven.index.DefaultSearchEngine.doSearchWithCeiling(DefaultSearchEngine.java:316)
> 	at org.apache.maven.index.DefaultSearchEngine.searchFlat(DefaultSearchEngine.java:169)
> 	at org.apache.maven.index.DefaultSearchEngine.searchFlatPaged(DefaultSearchEngine.java:102)
> 	at org.apache.maven.index.DefaultSearchEngine.searchFlatPaged(DefaultSearchEngine.java:77)
> {code}
> This comes after some index download problems like
> {code}
> java.io.FileNotFoundException: Resource nexus-maven-repository-index.gz does not exist
> 	at org.apache.maven.index.updater.WagonHelper$WagonFetcher.retrieve(WagonHelper.java:196)
> 	at org.apache.maven.index.updater.WagonHelper$WagonFetcher.retrieve(WagonHelper.java:166)
> 	at org.apache.maven.index.updater.DefaultIndexUpdater.loadIndexDirectory(DefaultIndexUpdater.java:191)
> 	at org.apache.maven.index.updater.DefaultIndexUpdater.access$300(DefaultIndexUpdater.java:76)
> 	at org.apache.maven.index.updater.DefaultIndexUpdater$LuceneIndexAdaptor.setIndexFile(DefaultIndexUpdater.java:642)
> 	at org.apache.maven.index.updater.DefaultIndexUpdater.fetchAndUpdateIndex(DefaultIndexUpdater.java:861)
> 	at org.apache.maven.index.updater.DefaultIndexUpdater.fetchAndUpdateIndex(DefaultIndexUpdater.java:157)
> {code}
> It seems that the {{DefaultIndexingContext.indexSearcher}} is null, for whatever reason, and {{searchFlatPaged}} is not verifying that it has been passed a valid context and does not attempt to fix an invalid context, perhaps using {{openAndWarmupReaders}}.
> Probably the caller is at fault for attempting a search on a context with no valid index, but this ought to be reported more clearly than with an NPE several calls down the stack, and there should be some documented method for checking that a context is somehow complete and ready for use.

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