ulimit -v unlimited might help, see
http://stackoverflow.com/questions/8892143/error-when-opening-a-lucene-index-map-failed Harald. On 18.08.2014 13:10, Shlomit Rosen wrote:
Hi all, Using lucene 3.6.2, we are trying to search a pretty small collection. To open the directory we use Mmap since we are running on a 64 bit linux machine, and we usually get much better results than using SimpleFS or NIO. Although the collection is only a few GB in size, we are getting an OOM exception right from the start: IQQS0003E The searchable object for collection /IndexStore/IndexArea/OS2_Document_20140813023606_9970347625CD4483BD700CA08571491C cannot be loaded. Causes of the problem: IQQS0004E The reader for index /IndexStore/IndexArea/OS2_Document_20140813023606_9970347625CD4483BD700CA08571491C/data/text cannot be created. IQQG0020E java.io.IOException: Map failed IQQG0020E java.lang.OutOfMemoryError: Map failed sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:784) org.apache.lucene.store.MMapDirectory$MMapIndexInput.<init>(MMapDirectory.java:270) org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:220) org.apache.lucene.index.SegmentCoreReaders.<init>(SegmentCoreReaders.java:96) org.apache.lucene.index.SegmentReader.get(SegmentReader.java:116) org.apache.lucene.index.SegmentReader.get(SegmentReader.java:94) org.apache.lucene.index.DirectoryReader.<init>(DirectoryReader.java:105) org.apache.lucene.index.ReadOnlyDirectoryReader.<init>(ReadOnlyDirectoryReader.java:27) org.apache.lucene.index.DirectoryReader$1.doBody(DirectoryReader.java:78) org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:709) org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:72) org.apache.lucene.index.IndexReader.open(IndexReader.java:375) ... Collection details: File Name File Size --------- --------- _9d.prx 700520240 bytes (668.07 MB) _6a.prx 688987818 bytes (657.07 MB) _im.prx 678185165 bytes (646.77 MB) _37.prx 672422515 bytes (641.27 MB) _rv.prx 672034961 bytes (640.90 MB) _fj.prx 669692961 bytes (638.67 MB) _cg.prx 666485509 bytes (635.61 MB) _os.prx 661239341 bytes (630.61 MB) _lp.prx 656960684 bytes (626.53 MB) _9d.frq 237580704 bytes (226.57 MB) _6a.frq 233601024 bytes (222.78 MB) _im.frq 229835093 bytes (219.19 MB) _37.frq 227920880 bytes (217.36 MB) _rv.frq 227857650 bytes (217.30 MB) _fj.frq 227030974 bytes (216.51 MB) _cg.frq 225955651 bytes (215.49 MB) _os.frq 224161119 bytes (213.78 MB) _lp.frq 222748045 bytes (212.43 MB) _tl.cfs 104218657 bytes (99.39 MB) _s2.cfs 99241207 bytes (94.64 MB) _ta.cfs 96972944 bytes (92.48 MB) _sz.cfs 95444312 bytes (91.02 MB) _sd.cfs 95334907 bytes (90.92 MB) _so.cfs 94020302 bytes (89.66 MB) _9d.fdt 67804161 bytes (64.66 MB) _6a.fdt 66670600 bytes (63.58 MB) _im.fdt 65635643 bytes (62.60 MB) _37.fdt 65082068 bytes (62.07 MB) _rv.fdt 65027960 bytes (62.02 MB) _fj.fdt 64820141 bytes (61.82 MB) _cg.fdt 64519880 bytes (61.53 MB) _os.fdt 63995985 bytes (61.03 MB) _lp.fdt 63578365 bytes (60.63 MB) _ts.cfs 16675689 bytes (15.90 MB) _tq.cfs 16630852 bytes (15.86 MB) _tn.cfs 10548412 bytes (10.06 MB) _to.cfs 9935882 bytes (9.48 MB) _tp.cfs 9667762 bytes (9.22 MB) _tm.cfs 9473559 bytes (9.03 MB) _tk.cfs 8742824 bytes (8.34 MB) _9d.tis 8027312 bytes (7.66 MB) _6a.tis 7898747 bytes (7.53 MB) _im.tis 7775053 bytes (7.41 MB) _37.tis 7714470 bytes (7.36 MB) _rv.tis 7702330 bytes (7.35 MB) _fj.tis 7682979 bytes (7.33 MB) _cg.tis 7649182 bytes (7.29 MB) _os.tis 7585214 bytes (7.23 MB) _lp.tis 7537160 bytes (7.19 MB) _tt.cfs 1832496 bytes (1.75 MB) _9d.fdx 858540 bytes (838.42 KB) _6a.fdx 844204 bytes (824.42 KB) _im.fdx 831084 bytes (811.61 KB) _37.fdx 824068 bytes (804.75 KB) _rv.fdx 823380 bytes (804.08 KB) _fj.fdx 820756 bytes (801.52 KB) _cg.fdx 816972 bytes (797.82 KB) _os.fdx 810332 bytes (791.34 KB) _lp.fdx 805044 bytes (786.18 KB) _tr.cfs 640731 bytes (625.71 KB) _tu.cfs 419728 bytes (409.89 KB) _9d.nrm 214638 bytes (209.61 KB) _6a.nrm 211054 bytes (206.11 KB) _im.nrm 207774 bytes (202.90 KB) _37.nrm 206020 bytes (201.19 KB) _rv.nrm 205848 bytes (201.02 KB) _fj.nrm 205192 bytes (200.38 KB) _cg.nrm 204246 bytes (199.46 KB) _os.nrm 202586 bytes (197.84 KB) _lp.nrm 201264 bytes (196.55 KB) _9d.tii 84483 bytes (82.50 KB) _6a.tii 83166 bytes (81.22 KB) _im.tii 81863 bytes (79.94 KB) _37.tii 81277 bytes (79.37 KB) _rv.tii 81113 bytes (79.21 KB) _fj.tii 80939 bytes (79.04 KB) _cg.tii 80709 bytes (78.82 KB) _os.tii 79774 bytes (77.90 KB) _lp.tii 79369 bytes (77.51 KB) segments_qj 5977 bytes (5.84 KB) _37.fnm 86 bytes _6a.fnm 86 bytes _9d.fnm 86 bytes _cg.fnm 86 bytes _fj.fnm 86 bytes _im.fnm 86 bytes _lp.fnm 86 bytes _os.fnm 86 bytes _rv.fnm 86 bytes Does this seem like a reasonable behavior or is this a bug? It seems to me that with this small segments, memory should not be an issue...? We haven't seen this exception in previous testing. In the lucene documentation I found that tweaking the chunk size might help, But this code goes into customer production environment, and this option is not feasible. Is there anything else I can check ahead of time (except for if this is a 32/64 bit platform) to help me decide Whether or not Mmap should be used? Thanks in advance, Shlomit
--------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org