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From Michael McCandless <luc...@mikemccandless.com>
Subject Re: [lucene 4.6] NPE when calling IndexReader#openIfChanged
Date Mon, 19 May 2014 08:43:30 GMT
Hmm, I was wrong before, the code is more complex than I thought.

Are you using doc-values updates?

Can you describe a bit more how your app works?  Are you ever removing
files directly from the index directory yourself between reopens?

Mike McCandless

http://blog.mikemccandless.com


On Mon, May 19, 2014 at 1:36 AM, Clemens Wyss DEV <clemensdev@mysign.ch> wrote:
> Sorry for being imprecise
> java version "1.6.0_26"
> Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
> Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02, mixed mode)
>
> - Clemens
> -----Ursprüngliche Nachricht-----
> Von: Michael McCandless [mailto:lucene@mikemccandless.com]
> Gesendet: Sonntag, 18. Mai 2014 16:51
> An: Lucene Users
> Betreff: Re: [lucene 4.6] NPE when calling IndexReader#openIfChanged
>
> But what is the output of "java -fullversion"?
>
> Mike McCandless
>
> http://blog.mikemccandless.com
>
> On Sun, May 18, 2014 at 5:24 AM, Clemens Wyss DEV <clemensdev@mysign.ch> wrote:
>>> What java version?
>> We are still on (1.)6
>>
>> -----Ursprüngliche Nachricht-----
>> Von: Michael McCandless [mailto:lucene@mikemccandless.com]
>> Gesendet: Donnerstag, 15. Mai 2014 11:43
>> An: Lucene Users
>> Betreff: Re: [lucene 4.6] NPE when calling IndexReader#openIfChanged
>>
>> delGen=-1 means there are no deletions, but the exception makes no
>> sense because up above SegmentReader.java calls si.hasDeletions()
>> which returns delGen != -1 which should have mean
>> Lucene40LiveDocsFormat.readLiveDocs should not have been called.  It
>> seems impossible :)
>>
>> What java version?
>>
>> Mike McCandless
>>
>> http://blog.mikemccandless.com
>>
>>
>> On Wed, May 14, 2014 at 2:16 AM, Clemens Wyss DEV <clemensdev@mysign.ch> wrote:
>>> Tackled this down a little bit more:
>>> Lucene40LiveDocsFormat#readLiveDocs calls
>>> IndexFileNames#fileNameForGeneration
>>> If I get this right, param 'gen' seems to be -1.
>>> Gen is being gathered from SegmentCommitInfo#getDelGen
>>>
>>> What does "delGen == -1" mean?
>>>
>>> -----Ursprüngliche Nachricht-----
>>> Von: Clemens Wyss DEV [mailto:clemensdev@mysign.ch]
>>> Gesendet: Dienstag, 13. Mai 2014 18:23
>>> An: java-user@lucene.apache.org
>>> Betreff: [lucene 4.6] NPE when calling IndexReader#openIfChanged
>>>
>>> I am facing the following stacktrace:
>>>         java.lang.NullPointerException: null
>>>           at java.io.File.<init>(File.java:305) ~[na:1.6.0_26]
>>>           at org.apache.lucene.store.NIOFSDirectory.openInput(NIOFSDirectory.java:80)
~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19 11:05:50]
>>>           at org.apache.lucene.codecs.lucene40.BitVector.<init>(BitVector.java:327)
~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19 11:05:50]
>>>           at org.apache.lucene.codecs.lucene40.Lucene40LiveDocsFormat.readLiveDocs(Lucene40LiveDocsFormat.java:90)
~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19 11:05:50]
>>>           at org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:131)
~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19 11:05:50]
>>>           at org.apache.lucene.index.StandardDirectoryReader.open(StandardDirectoryReader.java:194)
~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19 11:05:50]
>>>           at org.apache.lucene.index.StandardDirectoryReader.doOpenIfChanged(StandardDirectoryReader.java:326)
~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19 11:05:50]
>>>           at org.apache.lucene.index.StandardDirectoryReader$2.doBody(StandardDirectoryReader.java:320)
~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19 11:05:50]
>>>           at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:843)
~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19 11:05:50]
>>>           at org.apache.lucene.index.StandardDirectoryReader.doOpenFromCommit(StandardDirectoryReader.java:315)
~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19 11:05:50]
>>>           at org.apache.lucene.index.StandardDirectoryReader.doOpenNoWriter(StandardDirectoryReader.java:311)
~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19 11:05:50]
>>>           at org.apache.lucene.index.StandardDirectoryReader.doOpenIfChanged(StandardDirectoryReader.java:262)
~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19 11:05:50]
>>>           at org.apache.lucene.index.StandardDirectoryReader.doOpenIfChanged(StandardDirectoryReader.java:250)
~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19 11:05:50]
>>>           at
>>> org.apache.lucene.index.DirectoryReader.openIfChanged(DirectoryReader.
>>> java:170) ~[lucene-core.jar:4.6.0 1543363 - simon - 2013-11-19
>>> 11:05:50]
>>>
>>> Unfortunately not always. Looks like j.i.File<init> is getting param child
== null What might go wrong in openIfChanged?
>>> Thanks for any advices/hints
>>> Clemens
>>>
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>>
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