Learn how to fix the “Assertion failure in thread 908 in file fut0lst.ic “ error. Our MySQL Support team is here to help you with your questions and concerns.

Assertion failure in thread 908 in file fut0lst.ic

If you have been running into MySQL server crashes with cryptic error messages like the ones below, you’re not alone.

190408 13:44:12 InnoDB: Assertion failure in thread 139664240350976 in file btr/btr0btr.c line 136
InnoDB: Failing assertion: (ibool)!!page_is_comp(root) == dict_table_is_comp(index->table)
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/5.1/en/forcing-innodb-recovery.html
InnoDB: about forcing recovery.
12:44:12 UTC – mysqld got signal 6 ;
InnoDB: Failing assertion: (ibool)!!page_is_comp(root) == dict_table_is_comp(index->table)
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/5.1/en/forcing-innodb-recovery.html
InnoDB: about forcing recovery.
12:44:12 UTC – mysqld got signal 6 ;

Or

MySQL was stopped, attempted start – error 1067

Or

InnoDB: Assertion failure in thread 908 in file fut0lst.ic line 83
InnoDB: Failing assertion: addr.page == FIL_NULL || addr.boffset >= FIL_PAGE_DATA
InnoDB: We intentionally generate a memory trap.

InnoDB corruption is often a result of server outages or faulty hardware components like RAM modules. This can cause havoc on our database operations.

Let’s take a look at the symptoms, root causes, and solutions for this issue.

Symptoms

The telltale signs of InnoDB corruption can be found in error logs like `/var/log/mysqld.log` or `/var/log/mariadb/mariadb.log`.

The entries will resemble assertion failures and memory traps. Additionally, failed attempts to start MySQL seen as error code 1067 also lets us know there are underlying issues.

Root Cause

Severe InnoDB corruption is usually due to unexpected server outages or faulty RAM modules. These factors disrupt the integrity of the InnoDB tablespace, leading to assertion failures and data inconsistencies.

Resolution Strategies

1. We can use server snapshots to roll back to a previously stable state before the onset of corruption. This method restores the database to a functional state.
2. Perform a thorough examination of hardware components, particularly RAM modules. We need to identify and replace any faulty modules responsible for the memory-related errors and system instability. This prevents the error from recurring.

By understanding the symptoms and root causes, we can reduce the impact of InnoDB corruption and protect the integrity of the MySQL infrastructure.

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Conclusion

In brief, our Support Experts offered us tips on how to avoid errors like ”Assertion failure in thread 908 in file fut0lst.ic”.