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From Rich Cariens <richcari...@gmail.com>
Subject Re: MMapDirectory failed to map a 23G compound index segment
Date Thu, 08 Sep 2011 20:27:12 GMT
Thanks for the response. "free -g" reports:

        total        used        free        shared        buffers
cached
Mem:      141          95          46             0
0            93
-/+ buffers/cache:      2         139
Swap:       3           0           3

2011/9/7 Fran├žois Schiettecatte <fschiettecatte@gmail.com>

> My memory of this is a little rusty but isn't mmap also limited by mem +
> swap on the box? What does 'free -g' report?
>
> Fran├žois
>
> On Sep 7, 2011, at 12:25 PM, Rich Cariens wrote:
>
> > Ahoy ahoy!
> >
> > I've run into the dreaded OOM error with MMapDirectory on a 23G cfs
> compound
> > index segment file. The stack trace looks pretty much like every other
> trace
> > I've found when searching for OOM & "map failed"[1]. My configuration
> > follows:
> >
> > Solr 1.4.1/Lucene 2.9.3 (plus
> > SOLR-1969<https://issues.apache.org/jira/browse/SOLR-1969>
> > )
> > CentOS 4.9 (Final)
> > Linux 2.6.9-100.ELsmp x86_64 yada yada yada
> > Java SE (build 1.6.0_21-b06)
> > Hotspot 64-bit Server VM (build 17.0-b16, mixed mode)
> > ulimits:
> >    core file size     (blocks, -c)     0
> >    data seg size    (kbytes, -d)     unlimited
> >    file size     (blocks, -f)     unlimited
> >    pending signals    (-i)     1024
> >    max locked memory     (kbytes, -l)     32
> >    max memory size     (kbytes, -m)     unlimited
> >    open files    (-n)     256000
> >    pipe size     (512 bytes, -p)     8
> >    POSIX message queues     (bytes, -q)     819200
> >    stack size    (kbytes, -s)     10240
> >    cpu time    (seconds, -t)     unlimited
> >    max user processes     (-u)     1064959
> >    virtual memory    (kbytes, -v)     unlimited
> >    file locks    (-x)     unlimited
> >
> > Any suggestions?
> >
> > Thanks in advance,
> > Rich
> >
> > [1]
> > ...
> > java.io.IOException: Map failed
> > at sun.nio.ch.FileChannelImpl.map(Unknown Source)
> > at org.apache.lucene.store.MMapDirectory$MMapIndexInput.<init>(Unknown
> > Source)
> > at org.apache.lucene.store.MMapDirectory$MMapIndexInput.<init>(Unknown
> > Source)
> > at org.apache.lucene.store.MMapDirectory.openInput(Unknown Source)
> > at org.apache.lucene.index.SegmentReader$CoreReaders.<init>(Unknown
> Source)
> >
> > at org.apache.lucene.index.SegmentReader.get(Unknown Source)
> > at org.apache.lucene.index.SegmentReader.get(Unknown Source)
> > at org.apache.lucene.index.DirectoryReader.<init>(Unknown Source)
> > at org.apache.lucene.index.ReadOnlyDirectoryReader.<init>(Unknown Source)
> > at org.apache.lucene.index.DirectoryReader$1.doBody(Unknown Source)
> > at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(Unknown
> > Source)
> > at org.apache.lucene.index.DirectoryReader.open(Unknown Source)
> > at org.apache.lucene.index.IndexReader.open(Unknown Source)
> > ...
> > Caused by: java.lang.OutOfMemoryError: Map failed
> > at sun.nio.ch.FileChannelImpl.map0(Native Method)
> > ...
>
>

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