InternalServerError
anthropic.errors.InternalServerError (HTTP 500)
Stack trace
anthropic.errors.InternalServerError: HTTP 500 Internal Server Error: An unexpected error occurred on the server side. Please retry your request.
Why it happens
This error occurs when Anthropic's backend service encounters an unexpected failure or overload, causing it to return a 500 status. It is not caused by client-side issues but requires retrying the request after a short delay.
Detection
Detect this error by catching the InternalServerError exception from the Anthropic SDK and logging the HTTP status code 500 before retrying the request.
Causes & fixes
Temporary server overload or internal failure at Anthropic's API endpoint
Implement exponential backoff retry logic with a maximum retry count to handle transient 500 errors gracefully.
Malformed or unexpected request triggering server-side exception
Validate and sanitize all request parameters and payloads before sending to ensure compliance with Anthropic API specifications.
Using an outdated or incompatible version of the Anthropic SDK
Upgrade to the latest Anthropic SDK version to benefit from bug fixes and improved error handling.
Code: broken vs fixed
from anthropic import Anthropic
client = Anthropic(api_key='sk-...')
response = client.completions.create(model='claude-3-5-haiku-20241022', prompt='Hello') # This may raise InternalServerError
print(response)import os
from anthropic import Anthropic, errors
import time
client = Anthropic(api_key=os.environ['ANTHROPIC_API_KEY'])
max_retries = 3
for attempt in range(max_retries):
try:
response = client.messages.create(model='claude-3-5-haiku-20241022', messages=[{"role": "user", "content": "Hello"}]) # Added retry logic
print(response)
break
except errors.InternalServerError:
if attempt < max_retries - 1:
time.sleep(2 ** attempt) # exponential backoff
else:
raiseWorkaround
If immediate retry is not possible, catch InternalServerError, log the failure, and queue the request for asynchronous retry later.
Prevention
Design your client to always implement retries with exponential backoff for 500 errors and keep your SDK updated to avoid known issues.