# InnoDB data dictionary has unknown flags 50

**URL:** <https://forums.percona.com/t/innodb-data-dictionary-has-unknown-flags-50/3380>\
**Category:** Percona XtraBackup\
**Created:** [April 2, 2014, 4:11pm UTC](https://forums.percona.com/t/innodb-data-dictionary-has-unknown-flags-50/3380 "2014-04-02T16:11:41Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nekatreven](https://avatars.discourse-cdn.com/v4/letter/n/a6a055/32.png) [@nekatreven](https://forums.percona.com/u/nekatreven)\
**Post date:** [April 2, 2014, 4:11pm UTC](https://forums.percona.com/t/innodb-data-dictionary-has-unknown-flags-50/3380/1 "2014-04-02T16:11:41Z")

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When using innobackupex to back up a freshly-installed database host with a fresh copy of our application… I receive this included in the output: [INDENT]

```auto
xtrabackup: innodb_log_group_home_dir = ./
xtrabackup: innodb_log_files_in_group = 1
xtrabackup: innodb_log_file_size = 2097152
xtrabackup: Starting InnoDB instance for recovery.
xtrabackup: Using 104857600 bytes for buffer pool (set by --use-memory parameter)
InnoDB: The InnoDB memory heap is disabled
InnoDB: Mutexes and rw_locks use GCC atomic builtins
InnoDB: Compressed tables use zlib 1.2.3
InnoDB: Using CPU crc32 instructions
InnoDB: Initializing buffer pool, size = 100.0M
InnoDB: Completed initialization of buffer pool
InnoDB: Highest supported file format is Barracuda.
InnoDB: The log sequence numbers 8090774 and 8090774 in ibdata files do not match the log sequence number 8096316 in the ib_logfiles!
InnoDB: Database was not shutdown normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages
InnoDB: from the doublewrite buffer...
InnoDB: Last MySQL binlog file position 0 5040369, file name mysql-bin.000001
InnoDB: 128 rollback segment(s) are active.
InnoDB: Waiting for purge to start
[B]2014-04-02 20:49:23 7f62e5523700 InnoDB: Warning: table 'mysql/innodb_index_stats'
InnoDB: in InnoDB data dictionary has unknown flags 50.
2014-04-02 20:49:23 7f62e5523700 InnoDB: Warning: table 'mysql/innodb_table_stats'
InnoDB: in InnoDB data dictionary has unknown flags 50.
2014-04-02 20:49:23 7f62e5523700 InnoDB: Warning: table 'dev/FilterPreset'
InnoDB: in InnoDB data dictionary has unknown flags 50.
InnoDB: 5.6.15 started; log sequence number 8096316[/B]

```

[/INDENT]  
edit: Also, I should mention… the second pass of the --apply-log process shows the same warnings.

Ubuntu 13.10 x64 running Percona Server 5.6. Searching online, I do not find much for this error and only one result where the flag was ‘50’ ([URL=“[https://mobile.twitter.com/Savagedlight/status/436098380662452224?screen\_name=Savagedlight](https://mobile.twitter.com/Savagedlight/status/436098380662452224?screen_name=Savagedlight)”][https://mobile.twitter.com/Savagedli...e=Savagedlight[/URL]](https://mobile.twitter.com/Savagedli...e=Savagedlight%5B/URL%5D)). I’ve tried looking in some of the InnoDB sections of information\_schema at table flags but I see none that are 50 (and I suspect this is a different type of flag, anyway).

Thanks for reading and let me know if you need some additional info,  
Mark

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<div class="post-metadata">

**Author:** ![nekatreven](https://avatars.discourse-cdn.com/v4/letter/n/a6a055/32.png) [@nekatreven](https://forums.percona.com/u/nekatreven)\
**Post date:** [April 4, 2014, 5:39pm UTC](https://forums.percona.com/t/innodb-data-dictionary-has-unknown-flags-50/3380/2 "2014-04-04T17:39:14Z")

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I’ve opened a bug: [URL][https://bugs.launchpad.net/percona-server/+bug/1302882[/URL]](https://bugs.launchpad.net/percona-server/+bug/1302882%5B/URL%5D)