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  1. MariaDB Server
  2. MDEV-11968

With innodb_page_size=8K crash with 'Error 17' after "Tried to read 65536 bytes at offset 0. Was only able to read 49152."

    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Cannot Reproduce
    • Affects Version/s: 10.1
    • Fix Version/s: 10.1.23
    • Component/s: Backup
    • Labels:
      None

      Description

      Backup on empty database created with innodb_page_size=8K intentionally crashes trying to read 65K from ibdata1 :

      170201 15:29:20 Connecting to MySQL server host: localhost, user: root, password: not set, port: 3306, socket: /farm/m0-bb-10.1-wlad-xtrabackup/my.sock
      Using server version 10.1.21-MariaDB
      /farm/m0-bb-10.1-wlad-xtrabackup/build/extra/xtrabackup/xtrabackup based on MariaDB server 10.1.21-MariaDB Linux (x86_64)
      xtrabackup: uses posix_fadvise().
      xtrabackup: cd to /farm/m0-bb-10.1-wlad-xtrabackup/dt
      xtrabackup: open files limit requested 0, set to 1048576
      InnoDB: The universal page size of the database is set to 8192.
      xtrabackup: using the following InnoDB configuration:
      xtrabackup:   innodb_data_home_dir = ./
      xtrabackup:   innodb_data_file_path = ibdata1:12M:autoextend
      xtrabackup:   innodb_log_group_home_dir = ./
      xtrabackup:   innodb_log_files_in_group = 2
      xtrabackup:   innodb_log_file_size = 50331648
      170201 15:30:30 >> log scanned up to (927384)
      170201 15:30:31 >> log scanned up to (927384)
      ...
      170201 15:31:05 >> log scanned up to (927384)
      xtrabackup: Generating a list of tablespaces
      170201 15:31:06 >> log scanned up to (927384)
      ...
      170201 15:32:35 >> log scanned up to (927384)
      170201 15:32:36 >> log scanned up to (927384)
      170201 15:32:37 [01] Copying ./ibdata1 to /farm/m0-bb-10.1-wlad-xtrabackup/bkup/ibdata1
      170201 15:32:37 [01]        ...done
      InnoDB: Tried to read 65536 bytes at offset 0. Was only able to read 49152.
      InnoDB: Fatal error: cannot read from file. OS error number 17.
      2017-02-01 15:32:37 7f4bddffd700  InnoDB: Assertion failure in thread 139963823806208 in file os0file.cc line 3226
      InnoDB: We intentionally generate a memory trap.
      InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
      InnoDB: If you get repeated assertion failures or crashes, even
      InnoDB: immediately after the mysqld startup, there may be
      InnoDB: corruption in the InnoDB tablespace. Please refer to
      InnoDB: http://dev.mysql.com/doc/refman/5.6/en/forcing-innodb-recovery.html
      InnoDB: about forcing recovery.
      170201 15:32:37 [ERROR] mysqld got signal 6 ;
      ...
      stack_bottom = 0x0 thread_stack 0x48400
      /farm/m0-bb-10.1-wlad-xtrabackup/build/extra/xtrabackup/xtrabackup(my_print_stacktrace+0x29)[0x55c259874519]
      170201 15:32:37 >> log scanned up to (927384)
      /farm/m0-bb-10.1-wlad-xtrabackup/build/extra/xtrabackup/xtrabackup(handle_fatal_signal+0x2f5)[0x55c25945e395]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f4be42d1390]
      /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f4be2765428]
      /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7f4be276702a]
      /farm/m0-bb-10.1-wlad-xtrabackup/build/extra/xtrabackup/xtrabackup(+0x8dffb3)[0x55c259790fb3]
      /farm/m0-bb-10.1-wlad-xtrabackup/build/extra/xtrabackup/xtrabackup(_Z15xb_get_zip_sizei+0xe5)[0x55c25923c815]
      /farm/m0-bb-10.1-wlad-xtrabackup/build/extra/xtrabackup/xtrabackup(_Z15xb_fil_cur_openP12xb_fil_cur_tP14xb_read_filt_tP10fil_node_tj+0x1dd)[0x55c2592464dd]
      /farm/m0-bb-10.1-wlad-xtrabackup/build/extra/xtrabackup/xtrabackup(+0x38b967)[0x55c25923c967]
      /farm/m0-bb-10.1-wlad-xtrabackup/build/extra/xtrabackup/xtrabackup(+0x38bcb2)[0x55c25923ccb2]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7f4be42c76ba]
      /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f4be283682d]
      

      # du -ah
      256K    ./xtrabackup_logfile
      12M     ./ibdata1
      

      Om Windows error is little different and exits without crash :

      xtrabackup: open files limit requested 0, set to 0
      InnoDB: The universal page size of the database is set to 8192.
      xtrabackup: using the following InnoDB configuration:
      xtrabackup:   innodb_data_home_dir = .\
      xtrabackup:   innodb_data_file_path = ibdata1:12M:autoextend
      xtrabackup:   innodb_log_group_home_dir = .\
      xtrabackup:   innodb_log_files_in_group = 2
      xtrabackup:   innodb_log_file_size = 50331648
      InnoDB: Created tablespace for space 4294967280 name .\ib_logfile0 key_id 0 encryption 0.
      170201 16:40:56 >> log scanned up to (927384)
      InnoDB: Created tablespace for space 0 name .\ibdata1 key_id 1 encryption 0.
      xtrabackup: Generating a list of tablespaces
      InnoDB: Created tablespace for space 1 name mysql/innodb_table_stats key_id 0 encryption 0.
      InnoDB: Created tablespace for space 2 name mysql/innodb_index_stats key_id 0 encryption 0.
      InnoDB: Created tablespace for space 3 name mysql/gtid_slave_pos key_id 0 encryption 0.
      170201 16:40:56 [01] Copying .\ibdata1 to O:\f1\m1-bb-10.1-wlad-xtrabackup\bkup\ibdata1
      170201 16:40:56 [01]        ...done
       InnoDB: Operation read to file O:\f1\_depot\m-branch\bb-10.1-wlad-xtrabackup\storage\xtradb\os\os0file.cc and at line 3209
      InnoDB: File (unknown): 'read' returned OS error 0. Cannot continue operation
      

      O:\f1\m1-bb-10.1-wlad-xtrabackup\bkup>dir -s
      total 12544
      12288 ibdata1    256 xtrabackup_logfile
      

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              • Assignee:
                wlad Vladislav Vaintroub
                Reporter:
                anikitin Andrii Nikitin (Inactive)
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                • Created:
                  Updated:
                  Resolved: