Database Errors

0XC0190052

STATUS_TRANSACTIONMANAGER_NOT_ONLINE (0XC0190052) Fix

Windows won't boot or a VM won't start because the transaction manager isn't online. Usually the KTM...

Intermediate 👁 5 1d ago

0X00001A90

ERROR_TRANSACTIONAL_CONFLICT (0x00001A90): Fix Windows Transaction Name Collisions

This error means two processes tried to use the same NTFS transactional name at once. Kill the stale...

Advanced 👁 3 1d ago

FATAL: remaining connection slots are reserved for non-replication superuser con

PostgreSQL FATAL: Remaining Connection Slots Are Reserved — Fix It Fast

You've hit max_connections and the reserved superuser slots are full. Here's how to get back in and ...

Intermediate 👁 9 3d ago

0XC0190004

Fix STATUS_TM_INITIALIZATION_FAILED (0xC0190004) on Windows

0xC0190004 means the transaction manager can't start. Usually a corrupted log or disabled service. H...

Intermediate 👁 10 3d ago

FATAL: could not write to file "pg_wal/xlogtemp.12345": No space left on device

PostgreSQL FATAL: could not write to pg_wal/xlogtemp — Disk Full Fix

Your Postgres disk is full and it can't write WAL. Free space fast or move pg_wal to another volume,...

Intermediate 👁 15 4d ago

FATAL: sorry, too many clients already

PostgreSQL 'Too Many Clients Already' — Fix the Connection Limit

Postgres hit its max_connections cap and won't accept new clients. Raise the limit, kill idle sessio...

Intermediate 👁 11 4d ago

0X00001A95

ERROR_TRANSACTIONS_UNSUPPORTED_REMOTE 0X00001A95: Real Fix

Windows error 0x1A95 hits when an app tries a transacted file op on a share that doesn't support it....

Intermediate 👁 13 4d ago

0XC0190059

Fix STATUS_NO_LINK_TRACKING_IN_TRANSACTION (0xC0190059)

This error hits when a distributed link-tracking call runs inside an active transaction. Here's how ...

Advanced 👁 16 5d ago

IllegalOperation: unsupported format characteristic: data

MongoDB Won't Start: Fix 'IllegalOperation: unsupported format characteristic: data'

That MongoDB startup error after a crash usually means a corrupted WiredTiger metadata file. You can...

Intermediate 👁 12 6d ago

0XC0220012

STATUS_FWP_TIMEOUT (0XC0220012): Fix Transaction Lock Timeout

If you're seeing STATUS_FWP_TIMEOUT, a process is stuck waiting for a transaction lock. It's usually...

Intermediate 👁 17 6d ago

40001

PostgreSQL 40001: Fix Serialization Failure in REPEATABLE READ

Hit 40001 in Postgres? Your REPEATABLE READ transaction lost a write race. Here's how to fix the cod...

Intermediate 👁 19 6d ago

0X00001AAB

Fix ERROR_INDOUBT_TRANSACTIONS_EXIST (0x00001AAB) on Windows Server

This error shows up when Windows can't tell if a database transaction committed during a crash. Here...

Intermediate 👁 18 Sep 16, 2026

0X8004D10B

Fix XACT_E_DUPLICATE_TRANSID (0x8004D10B) in SQL Server and MSDTC

XACT_E_DUPLICATE_TRANSID hits when a transaction ID is reused — usually a retry bug, a stale MSDTC t...

Intermediate 👁 20 Sep 16, 2026

0X8004E031

CO_E_EXIT_TRANSACTION_SCOPE_NOT_CALLED (0x8004E031) Fix

You're seeing 0x8004E031 because a COM+ transaction ran the work but never called SetComplete or Set...

Intermediate 👁 19 Sep 15, 2026

FATAL: too many connections

PostgreSQL FATAL: too many connections — fix it fast

Your Postgres server hit max_connections and rejects new clients. Here's how to get back in, then st...

Intermediate 👁 24 Sep 14, 2026

0XC0190028

STATUS_HANDLE_NO_LONGER_VALID: Fix the 0xC0190028 Handle Error

That STATUS_HANDLE_NO_LONGER_VALID (0xC0190028) crash usually means a file handle got closed mid-ope...

Advanced 👁 16 Sep 13, 2026

WiredTiger error (Operation not permitted)

MongoDB WiredTiger error (Operation not permitted) after crash: 3 fixes

MongoDB won't start after a crash because WiredTiger can't create a lock file. Here's how to fix it ...

Beginner 👁 18 Sep 10, 2026

FATAL: 53300

PostgreSQL FATAL: sorry, too many clients already — Fix Connection Exhaustion

PostgreSQL FATAL 53300 means max_connections is maxed out. Fix it by raising limits, fixing leaks, a...

Intermediate 👁 14 Sep 10, 2026

null

Dealing with Database Connection Timeout: Fixes That Work

Database connection timeouts hit when the app can't reach the DB in time. I'll show you why it happe...

Intermediate 👁 19 Sep 8, 2026

Table './mysql/innodb_table_stats' is marked as crashed

MySQL 8.0.34+ crash after upgrade: fix innodb_table_stats

MySQL 8.0.34+ crashes on restart after an upgrade when the innodb_table_stats table is corrupted. Fi...

Intermediate 👁 20 Sep 7, 2026

0X8004E007

CONTEXT_E_OLDREF 0X8004E007 Fix for COM+ Database

This error pops up when a COM+ app tries to use stale transaction context after a database failover....

Intermediate 👁 23 Sep 7, 2026

0X00000239

Fix Sync Required Error 0X00000239 Step by Step

This error appears when Windows can't sync your files or settings. I'll show you the fastest fixes f...

Beginner 👁 22 Sep 6, 2026

ERROR 1040 (HY000): Too many connections

MySQL Error 1040: Too Many Connections — Real Fix

Too many connections means MySQL hit its connection cap. The real fix is raising max_connections, no...

Intermediate 👁 21 Sep 6, 2026

0X00001A2D

Fix ERROR_TRANSACTION_NOT_ACTIVE 0X00001A2D in Windows

Transaction handle went stale. Close the app or service that's holding it, then try again. Rollback ...

Intermediate 👁 20 Sep 6, 2026