Dovecot mmap bug

@4000000058c066310c11c66c Mar 08 17:14:31 indexer-worker(compras@kaiani.com.br): Fatal: pool_system_malloc(32656): Out of memory
@4000000058c066310c1675a4 Mar 08 17:14:31 indexer-worker(compras@kaiani.com.br): Error: Raw backtrace: /usr/local/dovecot/lib/dovecot/libdovecot.so.0(+0x9976a) [0x7f3fbc22f76a] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(+0x997e6) [0x7f3fbc22f7e6] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f3fbc1c813d] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(+0xb377f) [0x7f3fbc24977f] -> /usr/local/dovecot/lib/dovecot/lib21_fts_lucene_plugin.so(lucene_index_build_more+0x96) [0x7f3fb75bba26] -> /usr/local/dovecot/lib/dovecot/lib21_fts_lucene_plugin.so(+0x9c10) [0x7f3fb75b9c10] -> /usr/local/dovecot/lib/dovecot/lib20_fts_plugin.so(+0xa895) [0x7f3fb9cf4895] -> /usr/local/dovecot/lib/dovecot/lib20_fts_plugin.so(fts_build_mail+0x66a) [0x7f3fb9cf509a] -> /usr/local/dovecot/lib/dovecot/lib20_fts_plugin.so(+0x11ae0) [0x7f3fb9cfbae0] -> /usr/local/dovecot/lib/dovecot/libdovecot-storage.so.0(mail_precache+0x19) [0x7f3fbc4ee3d9] -> dovecot/indexer-worker() [0x4026b9] -> dovecot/indexer-worker() [0x402b1f] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x61) [0x7f3fbc242ef1] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xbf) [0x7f3fbc2445ef] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x3c) [0x7f3fbc242fac] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f3fbc243168] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f3fbc1cdf93] -> dovecot/indexer-worker(main+0xe1) [0x402131] -> /lib/libc.so.6(__libc_start_main+0xfd) [0x7f3fbbe52c8d] -> dovecot/indexer-worker() [0x401f89]
@4000000058c066310c6febfc Mar 08 17:14:31 indexer: Error: Indexer worker disconnected, discarding 1 requests for compras@kaiani.com.br
@4000000058c066310c741664 Mar 08 17:14:31 indexer-worker(compras@kaiani.com.br): Fatal: master: service(indexer-worker): child 38561 returned error 83 (Out of memory (service indexer-worker { vsz_limit=256 MB }, you may need to increase it) - set CORE_OUTOFMEM=1 environment to get core dump)
@4000000058c066d02df8a37c Mar 08 17:17:10 indexer-worker(compras@kaiani.com.br): Fatal: pool_system_malloc(32656): Out of memory
@4000000058c066d02dfdf2dc Mar 08 17:17:10 indexer-worker(compras@kaiani.com.br): Error: Raw backtrace: /usr/local/dovecot/lib/dovecot/libdovecot.so.0(+0x9976a) [0x7f47382b876a] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(+0x997e6) [0x7f47382b87e6] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f473825113d] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(+0xb377f) [0x7f47382d277f] -> /usr/local/dovecot/lib/dovecot/lib21_fts_lucene_plugin.so(lucene_index_build_more+0x96) [0x7f4733644a26] -> /usr/local/dovecot/lib/dovecot/lib21_fts_lucene_plugin.so(+0x9c10) [0x7f4733642c10] -> /usr/local/dovecot/lib/dovecot/lib20_fts_plugin.so(+0xa895) [0x7f4735d7d895] -> /usr/local/dovecot/lib/dovecot/lib20_fts_plugin.so(fts_build_mail+0x66a) [0x7f4735d7e09a] -> /usr/local/dovecot/lib/dovecot/lib20_fts_plugin.so(+0x11ae0) [0x7f4735d84ae0] -> /usr/local/dovecot/lib/dovecot/libdovecot-storage.so.0(mail_precache+0x19) [0x7f47385773d9] -> dovecot/indexer-worker() [0x4026b9] -> dovecot/indexer-worker() [0x402b1f] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x61) [0x7f47382cbef1] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xbf) [0x7f47382cd5ef] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x3c) [0x7f47382cbfac] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f47382cc168] -> /usr/local/dovecot/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f4738256f93] -> dovecot/indexer-worker(main+0xe1) [0x402131] -> /lib/libc.so.6(__libc_start_main+0xfd) [0x7f4737edbc8d] -> dovecot/indexer-worker() [0x401f89]
@4000000058c066d02e568e74 Mar 08 17:17:10 indexer: Error: Indexer worker disconnected, discarding 1 requests for compras@kaiani.com.br
@4000000058c066d02e5820cc Mar 08 17:17:10 indexer-worker(compras@kaiani.com.br): Fatal: master: service(indexer-worker): child 45516 returned error 83 (Out of memory (service indexer-worker { vsz_limit=256 MB }, you may need to increase it) - set CORE_OUTOFMEM=1 environment to get core dump