For some, even small, tables (with .ibd files passed through normal recovery and shutdown) innochecksum from MariaDB versions 10.1,.x and 10.2.x dumps core because of floating point exception, like this:
openxs@ao756:/tmp$ ~/dbs/maria10.2/bin/innochecksum -v table_name.ibd
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InnoDB offline file checksum utility.
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Variables (--variable-name=value)
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and boolean options {FALSE|TRUE} Value (after reading options)
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--------------------------------- ----------------------------------------
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verbose TRUE
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debug FALSE
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skip-corrupt FALSE
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count FALSE
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start-page 0
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end-page 0
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page 0
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per-page-details FALSE
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leaf FALSE
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merge 0
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Table is uncompressed
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Page size is 16384
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file table_name.ibd = 147456 bytes (9 pages)...
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InnoChecksum; checking pages in range 0 to 8
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0 bad checksum
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4 FIL_PAGE_INDEX
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0 FIL_PAGE_UNDO_LOG
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1 FIL_PAGE_INODE
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0 FIL_PAGE_IBUF_FREE_LIST
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2 FIL_PAGE_TYPE_ALLOCATED
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1 FIL_PAGE_IBUF_BITMAP
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0 FIL_PAGE_TYPE_SYS
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0 FIL_PAGE_TYPE_TRX_SYS
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1 FIL_PAGE_TYPE_FSP_HDR
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0 FIL_PAGE_TYPE_XDES
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0 FIL_PAGE_TYPE_BLOB
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0 FIL_PAGE_TYPE_ZBLOB
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0 FIL_PAGE_PAGE_COMPRESSED
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0 FIL_PAGE_PAGE_COMPRESSED_ENCRYPTED
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0 other
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0 max index_id
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undo type: 0 insert, 0 update, 0 other
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undo state: 0 active, 0 cached, 0 to_free, 0 to_purge, 0 prepared, 0 other
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index_id #pages #leaf_pages #recs_per_page #bytes_per_page
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787 1 1 45 1350
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Floating point exception (core dumped)
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If we let it create core file, gdb shows the following:
openxs@ao756:/tmp$ gdb ./innochecksum core.*
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GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
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...
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Core was generated by `innochecksum -v table_name.ibd'.
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Program terminated with signal SIGFPE, Arithmetic exception.
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#0 print_stats ()
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at /home/buildbot/buildbot/build/mariadb-10.1.13/extra/innochecksum.cc:645
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645 /home/buildbot/buildbot/build/mariadb-10.1.13/extra/innochecksum.cc: No such file or directory.
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(gdb) bt
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#0 print_stats ()
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at /home/buildbot/buildbot/build/mariadb-10.1.13/extra/innochecksum.cc:645
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#1 0x000055555556d8f1 in main (argc=1, argv=0x7fffffffe0e0)
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at /home/buildbot/buildbot/build/mariadb-10.1.13/extra/innochecksum.cc:983
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innochecksum from MySQL 5.6 or Percona Serrver 5.7.14 works without dumping core on the same .ibd file:
openxs@ao756:/tmp$ ~/dbs/5.6/bin/innochecksum -v table_name.ibd
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InnoDB offline file checksum utility.
|
|
Variables (--variable-name=value)
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and boolean options {FALSE|TRUE} Value (after reading options)
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--------------------------------- ----------------------------------------
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verbose TRUE
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debug FALSE
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count FALSE
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start-page 0
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end-page 0
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page 0
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file table_name.ibd = 147456 bytes (9 pages)...
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InnoChecksum; checking pages in range 0 to 8
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Bug
Major
commit ec5bd0d3855aa49afc3e356aa18b7edea3b7a18b
Author: Jan Lindström <jan.lindstrom@mariadb.com>
Date: Mon Oct 24 09:25:36 2016 +0300
MDEV-10969: innochecksum dumps core for some .ibd files due to floating point exceptionCheck that index has pages before using number of pages in
divide operation.