The server reaches an unexpected end-of-file while reading a table or log file, aborting the current statement or startup sequence.
MySQL Error 1039: ER_UNEXPECTED_EOF occurs when the server unexpectedly reaches the end of a file it is reading. Corrupt table data, disk faults, and abrupt shutdowns are common roots. Restore the damaged file or table, run CHECK TABLE/REPAIR TABLE, and ensure disk integrity to resolve the issue.
Unexpected EOF found when reading file '%s' (errno: %d -
MySQL raises error code 1039 when it hits an unexpected end-of-file (EOF) while reading a physical file, such as an .frm, .ibd, or binary log. The server assumes the file ends prematurely, so it cannot finish parsing metadata or data pages.
The failure halts the current SQL statement, prevents table access, or stops the instance from starting.
Quick remediation is vital because the underlying cause often indicates data corruption or hardware problems.
Corrupted table files created by an un-clean shutdown frequently trigger the unexpected EOF condition. Crash recovery may leave partial writes that break the file length header.
Disk-level issues, such as bad sectors or full disks, can truncate files silently.
Copying or moving data directories without completing sync operations also leaves files shorter than MySQL expects.
First, identify the file listed in the error message.
Stop MySQL to avoid further damage, back up the data directory, and verify disk health with fsck or chkdsk.
If the affected object is an InnoDB table, use innodb_force_recovery=1-4 to start the server, export the table with SELECT INTO OUTFILE, drop it, and re-import the data.
During server startup, the error usually points to a broken binary log.
Purge the corrupt log files and restart with --skip-slave-start if replication is affected.
When a single MyISAM table fails, run myisamchk or MySQL’s REPAIR TABLE. For InnoDB, fall back to a recent backup if force recovery fails to extract data.
Always shut down MySQL gracefully to prevent partial writes.
Enable crash-safe settings such as innodb_flush_log_at_trx_commit = 1 and sync_binlog = 1.
Schedule regular CHECK TABLE and mysqlcheck jobs, monitor disk SMART status, and keep redundant backups using Galaxy or mysqlpump.
Error 1030 (HY000): Got error -1 from storage engine often follows disk failures and needs similar disk checks.
Error 145: Table was marked as crashed arises after abrupt shutdowns; run REPAIR TABLE or myisamchk to recover.
.
Incomplete writes or power loss truncate .frm, .ibd, or .MYD files, leaving headers that point past the real EOF.
Bad blocks force the OS to cut reads short, so MySQL encounters premature EOF on healthy looking files.
Moving files between servers without rsync --partial or proper shutdown causes partial transfers MySQL later reads.
When the file system cannot extend a file, writes stop and the next read reports EOF earlier than expected.
.
No. Sometimes only metadata headers are truncated. You can often salvage rows with force-recovery and logical export.
Avoid ignoring it. Silent corruption spreads. Fix immediately to prevent larger outages.
Yes. The slave stops at the corrupt binary log. Purge or replace the file and restart replication.
Galaxy keeps all SQL in version control, encouraging frequent backups and making table rebuild scripts easily shareable, reducing the impact of corruption.
.avif)
.avif){kind=logo}
