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From Vijay B <vijay.nip...@gmail.com>
Subject Re: unsafe memory access operation
Date Fri, 12 Dec 2014 18:22:49 GMT
Ume, Thank you for your inputs. We update (write) index nightly once a day
and use it majorly for reads.

I am wondering how does the latest version of java that you recommend help
in my case. Please clarify.

--
on a side note,not related to this, could you please reply to my comments
on your blog for MMap directory post.

On Fri, Dec 12, 2014 at 12:59 PM, Uwe Schindler <uwe@thetaphi.de> wrote:
>
> Hi,
>
> I noticed, you mentioned "NFS" as filesystem. Lucene does not work
> correctly on NFS as file systems, especially when writing to an index
> (commits don’t work safely, NRT reopening breaks without correct
> DeletionPolicy, FileLocking is broken). Purely reading indexes is fine, but
> here NFS is a problem with MMap, because whenever the connection to the NFS
> server drops, it may crush the whole JVM or produce strange errors. This
> could also be the reason for the error you see here.
>
> I would recommend to update to 1.7.0_72 or 1.8.0_25.
>
> Uwe
>
> -----
> Uwe Schindler
> H.-H.-Meier-Allee 63, D-28213 Bremen
> http://www.thetaphi.de
> eMail: uwe@thetaphi.de
>
>
> > -----Original Message-----
> > From: Vijay B [mailto:vijay.nipuna@gmail.com]
> > Sent: Friday, December 12, 2014 6:53 PM
> > To: java-user@lucene.apache.org
> > Subject: Re: unsafe memory access operation
> >
> > Uwe,
> >
> > We never seen these errors before with the same version of java. Would
> > you think updating to latest version of 1.7 would get rid of this?
> >
> > Here is the info you requested:
> >
> > java version "1.7.0_25"
> > Java(TM) SE Runtime Environment (build 1.7.0_25-b15) Java HotSpot(TM) 64-
> > Bit Server VM (build 23.25-b01, mixed mode)
> >
> > On Fri, Dec 12, 2014 at 12:51 PM, Vijay B <vijay.nipuna@gmail.com>
> wrote:
> > >
> > > Here is the info you requested:
> > >
> > > java version "1.7.0_25"
> > > Java(TM) SE Runtime Environment (build 1.7.0_25-b15) Java HotSpot(TM)
> > > 64-Bit Server VM (build 23.25-b01, mixed mode)
> > >
> > >
> > >
> > > On Fri, Dec 12, 2014 at 12:05 PM, Uwe Schindler <uwe@thetaphi.de>
> > wrote:
> > >>
> > >> Hi,
> > >>
> > >> Which Java 7 build number / update level are you using? Those errors
> > >> occur easily if you use an outdated JDK version.
> > >>
> > >> Uwe
> > >>
> > >> -----
> > >> Uwe Schindler
> > >> H.-H.-Meier-Allee 63, D-28213 Bremen
> > >> http://www.thetaphi.de
> > >> eMail: uwe@thetaphi.de
> > >>
> > >> > -----Original Message-----
> > >> > From: Vijay B [mailto:vijay.nipuna@gmail.com]
> > >> > Sent: Friday, December 12, 2014 5:31 PM
> > >> > To: java-user@lucene.apache.org
> > >> > Subject: unsafe memory access operation
> > >> >
> > >> > we are running into this issue for the first time while searching
a
> > >> lucene index
> > >> > hosted on NFS. Once, this error occurs, all subsequent requests
> fails.
> > >> help
> > >> > appreciated.
> > >> >
> > >> > Our Config:
> > >> >  64-bit Java 1.7  (we are making use of MMapDirectory)  Lucene
> > >> > 4.2.1
> > >> Index
> > >> > size: 8GB
> > >> >
> > >> > Let me know if you need any futher info.
> > >> >
> > >> >
> > >> > java.lang.InternalError: a fault occurred in a recent unsafe memory
> > >> access
> > >> > operation in compiled Java code
> > >> >
> > org.apache.lucene.codecs.BlockTreeTermsReader$FieldReader$SegmentTe
> > >> > r
> > >> > msEnum$Frame.loadBlock(BlockTreeTermsReader.java:2373)
> > >> >
> > org.apache.lucene.codecs.BlockTreeTermsReader$FieldReader$SegmentTe
> > >> > r
> > >> > msEnum.seekExact(BlockTreeTermsReader.java:1693)
> > >> > org.apache.lucene.index.TermContext.build(TermContext.java:95)
> > >> >
> > org.apache.lucene.search.TermQuery.createWeight(TermQuery.java:167)
> > >> >
> > org.apache.lucene.search.BooleanQuery$BooleanWeight.&lt;init&gt;(Bo
> > >> > olea
> > >> > nQuery.java:187)
> > >> >
> > org.apache.lucene.search.BooleanQuery.createWeight(BooleanQuery.jav
> > >> > a:4
> > >> > 01)
> > >> >
> > org.apache.lucene.search.IndexSearcher.createNormalizedWeight(Index
> > >> > Sea
> > >> > rcher.java:664)
> > >> > org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:30
> > >> > 9)
> > >>
> > >>
> > >> ---------------------------------------------------------------------
> > >> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> > >> For additional commands, e-mail: java-user-help@lucene.apache.org
> > >>
> > >>
>
>
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>

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