[Dovecot] Problem with fts lucene, on solaris 10

Pigi pigi at frumar.it
Mon Apr 8 16:20:08 EEST 2013


On Monday 08 April 2013, Timo Sirainen wrote:
> On 8.4.2013, at 12.19, Pigi <pigi at frumar.it> wrote:
> 
> > Program received signal SIGSEGV, Segmentation fault.
> > 0xfebd65dc in _malloc_unlocked () from /lib/libc.so.1
> > (gdb) bt full
> > #0  0xfebd65dc in _malloc_unlocked () from /lib/libc.so.1
> > No symbol table info available.
> > #1  0xfebd66e4 in realloc () from /lib/libc.so.1
> > No symbol table info available.
> > #2  0xff1d9a70 in pool_system_realloc (pool=0xff21576c, mem=0xff21576c, old_size=0, new_size=8192) at mempool-system.c:115
> > No locals.
> > #3  0xff1cda28 in i_realloc (mem=0x0, old_size=0, new_size=8192) at imem.c:14
> > No locals.
> 
> Looks to me like memory corruption, which is just about impossible to debug if you don't have valgrind or a similar tool (and I don't think Solaris has any such free tools).

Yes, you're right. There aren't ( already packaged ) tool for valgrinding or similar.
 
> Do you happen to get any other crashes where it doesn't crash in malloc code? You showed previously that it was crashing with SIGBUS somewhere.

For what I can see, form dovecot.log I have a couple of error:
Apr 08 12:02:18 indexer: Error: Indexer worker disconnected, discarding 1 requests for xxxx
Apr 08 12:02:18 imap(xxxx): Error: indexer failed to index mailbox INBOX
Apr 08 12:02:18 indexer-worker(xxxx): Fatal: master: service(indexer-worker): child 27242 killed with signal 11 (core not dumped)
Apr 08 12:02:19 indexer-worker(xxxx): Error: lucene index /home/xxxx/Maildir/lucene-indexes: IndexWriter() failed (#1): Lock obtain timed out
Apr 08 12:03:46 indexer: Error: Indexer worker disconnected, discarding 1 requests for xxxx
Apr 08 12:03:46 imap(xxxx): Error: indexer failed to index mailbox INBOX
Apr 08 12:03:46 indexer-worker(xxxx): Fatal: master: service(indexer-worker): child 27445 killed with signal 10 (core not dumped)
Apr 08 12:06:57 indexer: Error: Indexer worker disconnected, discarding 1 requests for xxxx
Apr 08 12:06:57 imap(xxxx): Error: indexer failed to index mailbox INBOX
Apr 08 12:06:57 indexer-worker(xxxx): Fatal: master: service(indexer-worker): child 27761 killed with signal 11 (core not dumped)
Apr 08 12:08:33 indexer: Error: Indexer worker disconnected, discarding 1 requests for xxxx

Here a couple or more of gdb"ed" process, but tied to SEGV ( I almost suspect that when gdbing I always catch a SEGV ) : 

==============================================================
First gdb
==============================================================
No symbol table info available.
#1  0xfebd6884 in realloc () from /lib/libc.so.1
No symbol table info available.
#2  0xfe83d270 in lucene::util::StringReader::init (this=0x8d328, _value=0x2bb288, _length=3958, copyData=true)
    at /extpool/PACKAGES/DOVECOT/clucene-core-2.3.3.4/src/core/CLucene/util/Reader.cpp:48
        tmp = (TCHAR *) 0x2051e0
        length = 3958
#3  0xfe8837f0 in lucene::index::DocumentsWriter::ThreadState::FieldData::invertField (this=0x92df8, field=0x8d238, analyzer=0x2cb60, maxFieldLength=10000)
    at /extpool/PACKAGES/DOVECOT/clucene-core-2.3.3.4/src/core/CLucene/index/DocumentsWriterThreadState.cpp:887
        stringValue = (const TCHAR *) 0x2bb288
        stringValueLength = 3958
        stream = (class lucene::analysis::TokenStream *) 0x0
        streamValue = (class lucene::analysis::TokenStream *) 0x8d328
#4  0xfe883a58 in lucene::index::DocumentsWriter::ThreadState::FieldData::processField (this=0x92df8, analyzer=0x2cb60)
    at /extpool/PACKAGES/DOVECOT/clucene-core-2.3.3.4/src/core/CLucene/index/DocumentsWriterThreadState.cpp:798
        field = (class lucene::document::Field *) 0x8d238
#5  0xfe883d6c in lucene::index::DocumentsWriter::ThreadState::processDocument (this=0x8c0a8, analyzer=0x2cb60)
    at /extpool/PACKAGES/DOVECOT/clucene-core-2.3.3.4/src/core/CLucene/util/Array.h:90
        i = 6
#6  0xfe87ea00 in lucene::index::DocumentsWriter::updateDocument (this=0x84790, doc=0x8b838, analyzer=0x2cb60, delTerm=0x0)
    at /extpool/PACKAGES/DOVECOT/clucene-core-2.3.3.4/src/core/CLucene/index/DocumentsWriter.cpp:946
        state = (class lucene::index::DocumentsWriter::ThreadState *) 0x8c0a8
#7  0xfe87eb5c in lucene::index::DocumentsWriter::addDocument (this=0x84790, doc=0x8b838, analyzer=0x2cb60)
    at /extpool/PACKAGES/DOVECOT/clucene-core-2.3.3.4/src/core/CLucene/index/DocumentsWriter.cpp:930
No locals.
#8  0xfe8b1ea0 in lucene::index::IndexWriter::addDocument (this=0x8cc18, doc=0x8b838, analyzer=0x2cb60)
    at /extpool/PACKAGES/DOVECOT/clucene-core-2.3.3.4/src/core/CLucene/index/IndexWriter.cpp:682
No locals.
#9  0xfea18e04 in lucene_index_build_flush (index=0x37ba8) at lucene-wrapper.cc:484
        ret = 0
#10 0xfea18f88 in lucene_index_build_more (index=0x37ba8, uid=2995, data=0x185d18 "<xxxxxx at xxxxxxxx.xx>", size=23, hdr_name=0x8ba60 "Return-Path")
    at lucene-wrapper.cc:507
        id = {4, 0, 0, 0, -4196824, -15011172, 534768, -4196336, 516256, 0, 11560, -20155708, 9, 10, 36, 2727408, 516256, 148, 0, 441, 148864, 534768, 3}
        namesize = 9216
        datasize = 9216
        dest = Cannot access memory at address 0xbb3
(gdb) quit

==============================================================
Second gdb
==============================================================

gdb) bt full
#0  0xfebd6b24 in realfree () from /lib/libc.so.1
No symbol table info available.
#1  0xfebd7354 in cleanfree () from /lib/libc.so.1
No symbol table info available.
#2  0xfebd64ac in _malloc_unlocked () from /lib/libc.so.1
No symbol table info available.
#3  0xfebd639c in malloc () from /lib/libc.so.1
No symbol table info available.
#4  0xfe737b38 in operator new () from /usr/sfw/lib/libstdc++.so.6
No symbol table info available.
#5  0xfe8613f4 in Document (this=0x8b838) at /extpool/PACKAGES/DOVECOT/clucene-core-2.3.3.4/src/core/CLucene/document/Document.cpp:57
No locals.
#6  0xfea18fa8 in lucene_index_build_more (index=0x37ba8, uid=2995, data=0x8d7b0 "<xxxxxx at xxxxxxxx.xx>", size=23, hdr_name=0x8b9d0 "Return-Path")
    at lucene-wrapper.cc:511
        id = {4, 0, 0, 0, -4196824, -15011172, 1605360, -4196336, 516256, 0, 11560, -20155708, 9, 10, 36, 2122656, 516256, 148, 0, 441, 148864, 1605360, 3}
        namesize = 9216
        datasize = 9216
        dest = Cannot access memory at address 0xbb3
(gdb) quit

===============================================
third gdb 
=====================================================
(gdb) cont
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0xfebd710c in t_splay () from /lib/libc.so.1
(gdb) bt full
#0  0xfebd710c in t_splay () from /lib/libc.so.1
No symbol table info available.
#1  0xfebd6eb8 in t_delete () from /lib/libc.so.1
No symbol table info available.
#2  0xfebd6acc in realfree () from /lib/libc.so.1
No symbol table info available.
#3  0xfebd72c8 in _free_unlocked () from /lib/libc.so.1
No symbol table info available.
#4  0xfebd7204 in free () from /lib/libc.so.1
No symbol table info available.
#5  0xfe862144 in lucene::document::Field::_resetValue (this=0x71e288) at /extpool/PACKAGES/DOVECOT/clucene-core-2.3.3.4/src/core/CLucene/document/Field.cpp:300
No locals.
#6  0xfe862248 in ~Field (this=0x71e288) at /extpool/PACKAGES/DOVECOT/clucene-core-2.3.3.4/src/core/CLucene/document/Field.cpp:103
No locals.
#7  0xfe90dcc8 in ~CLVector (this=0x23c248) at /extpool/PACKAGES/DOVECOT/clucene-core-2.3.3.4/src/core/CLucene/util/Equators.h:227
        itr = {_M_current = 0x71eb00}
#8  0xfe860dfc in ~Document (this=0x832e0) at /extpool/PACKAGES/DOVECOT/clucene-core-2.3.3.4/src/core/CLucene/document/Document.cpp:69
No locals.
#9  0xfea18e30 in lucene_index_build_flush (index=0x8adc0) at lucene-wrapper.cc:493
        ret = 0
#10 0xfea18f88 in lucene_index_build_more (index=0x8adc0, uid=4128, data=0x6b2b00 "<YYYYYYYYY at yyyyyyyyyy.yyy>", size=23, hdr_name=0x1b6508 "Return-Path")
    at lucene-wrapper.cc:507
        id = {4, 0, 0, 0, -4196824, -15011172, 3114656, -4196336, 584416, 0, 11560, 0, 0, 0, 36, 7697128, 584416, 845, 0, 2382, 148880, 3114656, 3}
        namesize = 9216
        datasize = 9216
        dest = Cannot access memory at address 0x1020
(gdb)                                                                                   



Here a couple of ( probably ) interesting stuff :

root # grep "signal 10" /usr/local/dovecot/var/log/dovecot.log  |wc
      33     284    2308
root # grep "signal 11" /usr/local/dovecot/var/log/dovecot.log  |wc
      69     549    4457
root # grep "Lock obtain timed out" /usr/local/dovecot/var/log/dovecot.log  |wc
      74     420    3976

Thus, 74 times of 102 seems to be tied to "IndexWriter() failed (#1): Lock obtain timed out" ( which I don't really understand,
or at least I have not enough comprehension of code to understand).
The path where lucene try to get a lock is not NFS, but is an automount on the same machine ( no NFS then ).

It seems that the "Lock obtain timed out" happens every time I read a message with the MUA.

This error ("Lock obtain") happens every time I read a message from my MUA, I think it's due to the indexing process running on READ
imap command:

Apr 08 15:18:13 indexer: Error: Indexer worker disconnected, discarding 1 requests for xxxx
Apr 08 15:18:13 imap(xxxx): Error: indexer failed to index mailbox INBOX
Apr 08 15:18:13 indexer-worker(xxxx): Fatal: master: service(indexer-worker): child 18171 killed with signal 11 (core not dumped)
Apr 08 15:18:15 indexer-worker(xxxx): Error: lucene index /home/xxxx/Maildir/lucene-indexes: IndexWriter() failed (#1): Lock obtain timed out


When searching, instead, get the "Lock timeout" followed by another error:

Apr 08 15:11:37 indexer: Error: Indexer worker disconnected, discarding 1 requests for xxxx
Apr 08 15:11:37 imap(xxxx): Error: indexer failed to index mailbox INBOX
Apr 08 15:11:37 indexer-worker(xxxx): Fatal: master: service(indexer-worker): child 17438 killed with signal 10 (core not dumped)
Apr 08 15:11:38 indexer-worker(xxxx): Error: lucene index /home/xxxx/Maildir/lucene-indexes: IndexWriter() failed (#1): Lock obtain timed out
Apr 08 15:11:51 indexer: Error: Indexer worker disconnected, discarding 1 requests for xxxx
Apr 08 15:11:51 imap(xxxx): Error: indexer failed to index mailbox INBOX



In both case the signal ( 11 or 10, SEGV or SIGBUS ) it's indifferent ( sometimes is 10 sometimes is 11 ).

Hope I've been able to explain, as my english seems to get worst every time ;)

Pigi



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