All Errors

MySQL error EE_WRITE (3) indicates a failure writing to a file, typically caused by permission problems, non-existent directories, or path issues with the tmpdir setting. This error blocks database operations until the underlying filesystem problem is resolved. Quick fixes include checking permissions, verifying directory existence, and ensuring the MySQL tmpdir points to a valid location.

This generic Firebase Cloud Messaging error occurs when FCM encounters an unexpected condition that doesn't fit standard error categories. The fix involves validating Firebase setup, checking network connectivity, reviewing message payloads, and implementing robust error logging to identify the root cause.

This MySQL client error occurs when a prepared statement is executed without binding values to all the parameter placeholders (?) defined in the SQL query. The error indicates a mismatch between the expected parameters and the data actually provided.

This MySQL client error occurs when DNS SRV record lookup fails during connection attempts using the mysql_real_connect_dns_srv() function or --dns-srv-name option. The error indicates the DNS server either cannot find the SRV record, the SRV record is misconfigured, or DNS resolution is failing. This commonly affects MySQL 8.0+ clients using DNS SRV for failover and load balancing scenarios.

This error occurs when importing users with a password hash algorithm that Firebase Authentication does not recognize or support. Learn how to identify supported hash algorithms, validate import parameters, and correctly configure user migration.

The "must be owner of table" error (PostgreSQL error code 42501) occurs when pg_restore attempts to perform operations on tables owned by a different user. This typically happens when restoring a dump to a different database environment or when the restoring user lacks superuser privileges.

SQLITE_LOCKED_SHAREDCACHE occurs when multiple connections to the same database in shared-cache mode attempt conflicting operations simultaneously. This error indicates a table-level lock conflict and typically appears in multi-threaded applications. The recommended solution is to disable shared-cache mode or migrate to WAL mode, which handles concurrent access more efficiently.

The "trigger cannot change partition destination" error occurs when a BEFORE INSERT trigger modifies the partition key column on a partitioned table. PostgreSQL determines partition assignment before trigger execution, so changing the partition key value creates a conflict. Redesign triggers to avoid modifying partition key columns, or use alternative approaches like staging tables.

PostgreSQL has activated its vacuum failsafe mechanism to prevent transaction ID wraparound. This emergency response occurs when a table's transaction ID age exceeds the safety threshold and autovacuum hasn't kept up with freezing old transactions, risking database shutdown.

This error occurs when PostgreSQL's parser reaches the end of a statement unexpectedly. It typically indicates incomplete SQL syntax, missing parentheses, unclosed quotes, or incorrect parameter placeholders.

PostgreSQL PANIC: could not write to file occurs when the database runs out of disk space or encounters I/O errors while writing critical data. This is a severe issue that stops the server and requires immediate action to resolve.

This error occurs when your application attempts a write operation on a Redis replica instead of the primary master node. Redis replicas are read-only by design to maintain data consistency across the replication cluster.

The BUSY error occurs when a Lua script is running longer than Redis expects, blocking other clients from executing commands. Clients attempting to send commands receive a BUSY response, indicating they must wait or kill the script.

This SSL error occurs when the hostname in your connection string doesn't match the hostname in the PostgreSQL server's SSL certificate. The mismatch happens when using verify-full SSL mode, which validates both the certificate chain and the hostname.

The 'No SSL connection' error occurs when a PostgreSQL client expects an SSL/TLS encrypted connection but the server either doesn't support SSL, hasn't enabled it, or the connection parameters don't match. This commonly appears when sslmode is set to require or verify-ca but SSL isn't properly configured.

This error occurs when executing a prepared statement with a mismatched number of parameters. The SQL query expects M parameter placeholders (like $1, $2) but your application is providing N values instead. This commonly happens when parameter placeholders are accidentally placed inside string literals or when parameters are missing from the query.

This error occurs when you try to run a Redis command on a key that stores a different data type than the command expects. For example, using HGETALL (hash command) on a string key will fail. The fix is to check the key's actual type and use the correct command.

Redis detects a checksum mismatch in DUMP payloads or corrupted RDB files, typically during DUMP/RESTORE operations or RDB loading. This happens when data is corrupted during transfer, stored on a bad disk sector, or incompatible with your Redis version. Verify file integrity and restore from backups to recover.

This error occurs when Elasticsearch cannot find any available shard replica to execute a search query, typically due to unassigned shards from node failures, cluster rebalancing, or misconfigured replication settings. Resolving shard allocation issues restores search functionality.

When using SQLite's shared-cache mode, connections within the same process experience table-level locking conflicts that return SQLITE_LOCKED_SHAREDCACHE (error code 6). Unlike SQLITE_BUSY (which occurs between separate processes), this error indicates a locking conflict between connections sharing the same cache and cannot be resolved with timeout settings.