Value is not an integer or out of range
Production Risk
Low. The server correctly rejects an invalid operation.
This error occurs when a command that expects an integer argument (like INCR or BITPOS) is used on a key that contains a non-integer string, or the operation would result in a value outside the 64-bit signed integer range.
- 1Attempting to `INCR` a key that holds a string like 'hello' or a floating-point number.
- 2The value stored in the key is already at the maximum value for a 64-bit signed integer.
- 3Providing a non-integer value as an argument to a command expecting one (e.g. `EXPIRE key 'onetwothree'`).
A client tries to increment a key that holds a floating point number.
SET mykey "10.5" INCR mykey
expected output
(error) ERR value is not an integer or out of range
Fix 1
Ensure the key holds an integer value
WHEN Before using integer-specific commands
# Application logic should ensure only integers are set SET mycounter 10 INCR mycounter
Why this works
By only storing valid, base-10 integer strings in keys intended for integer operations, you prevent this error.
Fix 2
Use `INCRBYFLOAT` for floating-point arithmetic
WHEN You need to work with decimal values
SET mykey "10.5" INCRBYFLOAT mykey 0.5
Why this works
Redis provides a separate set of commands for floating-point numbers. These commands correctly handle decimal values.
✕ Store numbers as floats when you only need integers
Using floating point numbers when not necessary can introduce precision issues and makes you unable to use atomic integer operations like `INCR`.
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