AWS
LambdaInvalidParameterValueException - Lambda Invalid Parameter Value
Getting a **LambdaInvalidParameterValueException** means one or more Lambda function parameters have invalid values—function name format, runtime, memory size, timeout, or environment variables don't meet Lambda requirements. This client-side error (4xx) happens when AWS validates Lambda parameters. Most common when memory size is invalid, but also appears when function name format is wrong, runtime specification is invalid, timeout is out of range, or environment variable format is incorrect.
#Common Causes
- →Identity: IAM policy allows Lambda creation but parameter invalid. Service Control Policy (SCP) enforces parameter restrictions.
- →Network: VPC endpoint Lambda parameter restrictions. API Gateway Lambda integration limits.
- →Limits: Invalid function name format. Invalid runtime specification. Invalid memory size value (must be 128-10240 MB, multiple of 64). Invalid timeout value (must be 1-900 seconds). Invalid environment variable format.
✓Solutions
- 1Step 1: Diagnose - Check exact error message: AWS usually specifies which parameter is invalid. Review error message for parameter name. Check parameter value.
- 2Step 2: Diagnose - Verify function name format: Function name must be 1-64 characters. Alphanumeric, hyphens, underscores allowed. Cannot start with number. Check naming conventions.
- 3Step 3: Diagnose - Validate memory and timeout: Check memory size is 128-10240 MB and multiple of 64. Verify timeout is 1-900 seconds. Check runtime is supported.
- 4Step 4: Fix - Use valid parameter values: Set memory to valid value: aws lambda update-function-configuration --function-name FUNCTION_NAME --memory-size 512. Set timeout: --timeout 30. Verify runtime: --runtime python3.11.
- 5Step 5: Fix - Validate environment variables: Check environment variable names (no spaces, valid characters). Verify values are valid JSON if using JSON format. Check variable count limits (4KB total).
</>Code Examples
Validate Lambda Function Parameters
1#!/bin/bash
2FUNCTION_NAME="my-function"
3RUNTIME="python3.11"
4MEMORY_SIZE=512
5TIMEOUT=30
6
7echo "=== Validating Lambda Parameters ==="
8
9# Validate function name (1-64 characters, alphanumeric, hyphens, underscores)
10if [ ${#FUNCTION_NAME} -lt 1 ] || [ ${#FUNCTION_NAME} -gt 64 ]; then
11 echo "✗ Invalid function name length: ${#FUNCTION_NAME} (must be 1-64)"
12 exit 1
13fi
14
15if [[ ! "${FUNCTION_NAME}" =~ ^[a-zA-Z0-9_-]+$ ]]; then
16 echo "✗ Invalid function name format: ${FUNCTION_NAME}"
17 echo "Must be alphanumeric, hyphens, underscores only"
18 exit 1
19fi
20
21# Validate memory size (128-10240 MB, multiple of 64)
22if [ ${MEMORY_SIZE} -lt 128 ] || [ ${MEMORY_SIZE} -gt 10240 ]; then
23 echo "✗ Invalid memory size: ${MEMORY_SIZE} (must be 128-10240 MB)"
24 exit 1
25fi
26
27if [ $((${MEMORY_SIZE} % 64)) -ne 0 ]; then
28 echo "✗ Invalid memory size: ${MEMORY_SIZE} (must be multiple of 64)"
29 exit 1
30fi
31
32# Validate timeout (1-900 seconds)
33if [ ${TIMEOUT} -lt 1 ] || [ ${TIMEOUT} -gt 900 ]; then
34 echo "✗ Invalid timeout: ${TIMEOUT} (must be 1-900 seconds)"
35 exit 1
36fi
37
38# Check runtime is supported
39SUPPORTED_RUNTIMES=("python3.11" "python3.12" "nodejs20.x" "java21" "go1.x")
40if [[ ! " ${SUPPORTED_RUNTIMES[@]} " =~ " ${RUNTIME} " ]]; then
41 echo "⚠ Runtime ${RUNTIME} may not be supported"
42 echo "Check: aws lambda list-runtimes"
43fi
44
45echo "✓ All parameters valid"
46echo "Function name: ${FUNCTION_NAME}"
47echo "Runtime: ${RUNTIME}"
48echo "Memory: ${MEMORY_SIZE} MB"
49echo "Timeout: ${TIMEOUT} seconds"Update Lambda Function with Valid Parameters
1#!/bin/bash
2FUNCTION_NAME="my-function"
3
4echo "=== Updating Lambda Function Configuration ==="
5
6# Update memory size (must be multiple of 64)
7MEMORY_SIZE=512
8if [ $((${MEMORY_SIZE} % 64)) -ne 0 ]; then
9 echo "✗ Memory size must be multiple of 64"
10 MEMORY_SIZE=512 # Round to nearest multiple
11fi
12
13aws lambda update-function-configuration \
14 --function-name ${FUNCTION_NAME} \
15 --memory-size ${MEMORY_SIZE} 2>&1
16
17# Update timeout (1-900 seconds)
18TIMEOUT=30
19if [ ${TIMEOUT} -lt 1 ] || [ ${TIMEOUT} -gt 900 ]; then
20 echo "✗ Timeout must be 1-900 seconds"
21 exit 1
22fi
23
24aws lambda update-function-configuration \
25 --function-name ${FUNCTION_NAME} \
26 --timeout ${TIMEOUT} 2>&1
27
28# Verify configuration
29echo "\n=== Current Configuration ==="
30aws lambda get-function-configuration \
31 --function-name ${FUNCTION_NAME} \
32 --query '[FunctionName,MemorySize,Timeout,Runtime]' \
33 --output tableList Supported Lambda Runtimes
1#!/bin/bash
2echo "=== Supported Lambda Runtimes ==="
3echo "Check current supported runtimes:"
4echo "aws lambda list-runtimes"
5
6# Common runtimes
7echo "\n=== Common Lambda Runtimes ==="
8echo "Python: python3.11, python3.12"
9echo "Node.js: nodejs20.x, nodejs18.x"
10echo "Java: java21, java17"
11echo "Go: go1.x"
12echo ".NET: dotnet8, dotnet6"
13echo "Ruby: ruby3.3"
14
15# Validate runtime before use
16RUNTIME="python3.11"
17echo "\n=== Validating Runtime: ${RUNTIME} ==="
18echo "Use: aws lambda create-function --runtime ${RUNTIME} ..."↗Related Errors
Provider Information
This error code is specific to AWS services. For more information, refer to the official AWS documentation.